Not sure if my engine cam chain is timed correctly
Not sure if my engine cam chain is timed correctly
Hi guys,
So I got my engine back in the car today and sort of started it. It barely starts at all, and when it does, it runs really rough.
I have to retard the timing as much as possible to get it to start. I'm wondering if I set the cam shaft correctly??
I lined the engine belt pulley up with the "T" on the case, and checked to make sure my piston really was at TDC, and not at BDC.
Then I put in the cam so that the line on the gear was perfectly level and flat. Put the chain on the cam, and installed the two cam shaft holders on the sides. Then I rotated the engine around a couple times with the cam chain tensioner installed, so there was no slack in the chain. When I lined the pulley up with the "T" again, the flat line was still flat like it should be. But kind of feels like the timing is not right.
Tomorrow, I plan to get it started and put a timing light on the engine. But I don't know where the mark on the pulley should be when I point the timing light at it. Does anyone know where it should be??
thanks a lot,
Mike.
So I got my engine back in the car today and sort of started it. It barely starts at all, and when it does, it runs really rough.
I have to retard the timing as much as possible to get it to start. I'm wondering if I set the cam shaft correctly??
I lined the engine belt pulley up with the "T" on the case, and checked to make sure my piston really was at TDC, and not at BDC.
Then I put in the cam so that the line on the gear was perfectly level and flat. Put the chain on the cam, and installed the two cam shaft holders on the sides. Then I rotated the engine around a couple times with the cam chain tensioner installed, so there was no slack in the chain. When I lined the pulley up with the "T" again, the flat line was still flat like it should be. But kind of feels like the timing is not right.
Tomorrow, I plan to get it started and put a timing light on the engine. But I don't know where the mark on the pulley should be when I point the timing light at it. Does anyone know where it should be??
thanks a lot,
Mike.
-
misterpoopoohead
- Posts: 30
- Joined: Tue Mar 20, 2007 3:34 am
Re: Not sure if my engine cam chain is timed correctly
Dude. Some cams are marked wrong from the factory. Crazy, but apparently true.
Kev Sent from my Verizon Wireless BlackBerry
From:
"Mega"
Sender:
anzhonda600owners@yahoogroups.com
Date:
Mon, 26 Jul 2010 23:11:01 -0000
To:
ReplyTo:
anzhonda600owners@yahoogroups.com
Subject:
[anzhonda600owners] Not sure if my engine cam chain is timed correctly
Hi guys,
So I got my engine back in the car today and sort of started it. It barely starts at all, and when it does, it runs really rough.
I have to retard the timing as much as possible to get it to start. I'm wondering if I set the cam shaft correctly??
I lined the engine belt pulley up with the "T" on the case, and checked to make sure my piston really was at TDC, and not at BDC.
Then I put in the cam so that the line on the gear was perfectly level and flat. Put the chain on the cam, and installed the two cam shaft holders on the sides. Then I rotated the engine around a couple times with the cam chain tensioner installed, so there was no slack in the chain. When I lined the pulley up with the "T" again, the flat line was still flat like it should be. But kind of feels like the timing is not right.
Tomorrow, I plan to get it started and put a timing light on the engine. But I don't know where the mark on the pulley should be when I point the timing light at it. Does anyone know where it should be??
thanks a lot,
Mike.
Kev Sent from my Verizon Wireless BlackBerry
From:
"Mega"
Sender:
anzhonda600owners@yahoogroups.com
Date:
Mon, 26 Jul 2010 23:11:01 -0000
To:
ReplyTo:
anzhonda600owners@yahoogroups.com
Subject:
[anzhonda600owners] Not sure if my engine cam chain is timed correctly
Hi guys,
So I got my engine back in the car today and sort of started it. It barely starts at all, and when it does, it runs really rough.
I have to retard the timing as much as possible to get it to start. I'm wondering if I set the cam shaft correctly??
I lined the engine belt pulley up with the "T" on the case, and checked to make sure my piston really was at TDC, and not at BDC.
Then I put in the cam so that the line on the gear was perfectly level and flat. Put the chain on the cam, and installed the two cam shaft holders on the sides. Then I rotated the engine around a couple times with the cam chain tensioner installed, so there was no slack in the chain. When I lined the pulley up with the "T" again, the flat line was still flat like it should be. But kind of feels like the timing is not right.
Tomorrow, I plan to get it started and put a timing light on the engine. But I don't know where the mark on the pulley should be when I point the timing light at it. Does anyone know where it should be??
thanks a lot,
Mike.
Re: Not sure if my engine cam chain is timed correctly
Its been a while since I had a 600 engine apart, but doesn't the cam have a slot cut in one end that can be seen through the camholder. And that slot should be straight up when at TDC.
From:
"misterpoopoohead@..." To:
anzhonda600owners@yahoogroups.com Sent:
Mon, July 26, 2010 11:06:27 PM Subject:
Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
Dude. Some cams are marked wrong from the factory. Crazy, but apparently true.
Kev Sent from my Verizon Wireless BlackBerry From:
"Mega"
Sender:
anzhonda600owners@ yahoogroups. com
Date:
Mon, 26 Jul 2010 23:11:01 -0000 To:
ReplyTo:
anzhonda600owners@ yahoogroups. com
Subject:
[anzhonda600owners] Not sure if my engine cam chain is timed correctly
Hi guys,
So I got my engine back in the car today and sort of started it. It barely starts at all, and when it does, it runs really rough.
I have to retard the timing as much as possible to get it to start. I'm wondering if I set the cam shaft correctly??
I lined the engine belt pulley up with the "T" on the case, and checked to make sure my piston really was at TDC, and not at BDC.
Then I put in the cam so that the line on the gear was perfectly level and flat. Put the chain on the cam, and installed the two cam shaft holders on the sides. Then I rotated the engine around a couple times with the cam chain tensioner installed, so there was no slack in the chain. When I lined the pulley up with the "T" again, the flat line was still flat like it should be. But kind of feels like the timing is not right.
Tomorrow, I plan to get it started and put a timing light on the engine. But I don't know where the mark on the pulley should be when I point the timing light at it. Does anyone know where it should be??
thanks a lot,
Mike.
From:
"misterpoopoohead@..." To:
anzhonda600owners@yahoogroups.com Sent:
Mon, July 26, 2010 11:06:27 PM Subject:
Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
Dude. Some cams are marked wrong from the factory. Crazy, but apparently true.
Kev Sent from my Verizon Wireless BlackBerry From:
"Mega"
Sender:
anzhonda600owners@ yahoogroups. com
Date:
Mon, 26 Jul 2010 23:11:01 -0000 To:
ReplyTo:
anzhonda600owners@ yahoogroups. com
Subject:
[anzhonda600owners] Not sure if my engine cam chain is timed correctly
Hi guys,
So I got my engine back in the car today and sort of started it. It barely starts at all, and when it does, it runs really rough.
I have to retard the timing as much as possible to get it to start. I'm wondering if I set the cam shaft correctly??
I lined the engine belt pulley up with the "T" on the case, and checked to make sure my piston really was at TDC, and not at BDC.
Then I put in the cam so that the line on the gear was perfectly level and flat. Put the chain on the cam, and installed the two cam shaft holders on the sides. Then I rotated the engine around a couple times with the cam chain tensioner installed, so there was no slack in the chain. When I lined the pulley up with the "T" again, the flat line was still flat like it should be. But kind of feels like the timing is not right.
Tomorrow, I plan to get it started and put a timing light on the engine. But I don't know where the mark on the pulley should be when I point the timing light at it. Does anyone know where it should be??
thanks a lot,
Mike.
Re: Not sure if my engine cam chain is timed correctly
The notch is the more reliable mark on the camshaft. It should be showing in the cam shaft holder (on the oil cap side) when the piston is at TDC. When the notch is showing, all the valves should be closed. While I have seen the scribe on the cam sprocket incorrect, I have never seen the notch on the cam incorrect. Others may have a different experience.
Dale
Dale
> Its been
> a while since I had a 600 engine apart, but doesn't the cam have a slot cut in > one end that can be seen through the camholder. And that slot should be > straight up when at TDC.
-
misterpoopoohead
- Posts: 30
- Joined: Tue Mar 20, 2007 3:34 am
Re: Not sure if my engine cam chain is timed correctly
From what I've been told the slot and the straight line are in the wrong place on some cams. They aren't serialized so apparently no way to identify except by looking at them. Sucks, don't it?
Kev Sent from my Verizon Wireless BlackBerry
From:
brad fenn
Sender:
anzhonda600owners@yahoogroups.com
Date:
Mon, 26 Jul 2010 21:20:24 -0700 (PDT)
To:
ReplyTo:
anzhonda600owners@yahoogroups.com
Subject:
Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
Its been a while since I had a 600 engine apart, but doesn't the cam have a slot cut in one end that can be seen through the camholder. And that slot should be straight up when at TDC.
From:
"misterpoopoohead@ yahoo.com" To:
anzhonda600owners@ yahoogroups. com Sent:
Mon, July 26, 2010 11:06:27 PM Subject:
Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
Dude. Some cams are marked wrong from the factory. Crazy, but apparently true.
Kev Sent from my Verizon Wireless BlackBerry From:
"Mega"
Sender:
anzhonda600owners@ yahoogroups. com
Date:
Mon, 26 Jul 2010 23:11:01 -0000 To:
ReplyTo:
anzhonda600owners@ yahoogroups. com
Subject:
[anzhonda600owners] Not sure if my engine cam chain is timed correctly
Hi guys,
So I got my engine back in the car today and sort of started it. It barely starts at all, and when it does, it runs really rough.
I have to retard the timing as much as possible to get it to start. I'm wondering if I set the cam shaft correctly??
I lined the engine belt pulley up with the "T" on the case, and checked to make sure my piston really was at TDC, and not at BDC.
Then I put in the cam so that the line on the gear was perfectly level and flat. Put the chain on the cam, and installed the two cam shaft holders on the sides. Then I rotated the engine around a couple times with the cam chain tensioner installed, so there was no slack in the chain. When I lined the pulley up with the "T" again, the flat line was still flat like it should be. But kind of feels like the timing is not right.
Tomorrow, I plan to get it started and put a timing light on the engine. But I don't know where the mark on the pulley should be when I point the timing light at it. Does anyone know where it should be??
thanks a lot,
Mike.
Kev Sent from my Verizon Wireless BlackBerry
From:
brad fenn
Sender:
anzhonda600owners@yahoogroups.com
Date:
Mon, 26 Jul 2010 21:20:24 -0700 (PDT)
To:
ReplyTo:
anzhonda600owners@yahoogroups.com
Subject:
Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
Its been a while since I had a 600 engine apart, but doesn't the cam have a slot cut in one end that can be seen through the camholder. And that slot should be straight up when at TDC.
From:
"misterpoopoohead@ yahoo.com" To:
anzhonda600owners@ yahoogroups. com Sent:
Mon, July 26, 2010 11:06:27 PM Subject:
Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
Dude. Some cams are marked wrong from the factory. Crazy, but apparently true.
Kev Sent from my Verizon Wireless BlackBerry From:
"Mega"
Sender:
anzhonda600owners@ yahoogroups. com
Date:
Mon, 26 Jul 2010 23:11:01 -0000 To:
ReplyTo:
anzhonda600owners@ yahoogroups. com
Subject:
[anzhonda600owners] Not sure if my engine cam chain is timed correctly
Hi guys,
So I got my engine back in the car today and sort of started it. It barely starts at all, and when it does, it runs really rough.
I have to retard the timing as much as possible to get it to start. I'm wondering if I set the cam shaft correctly??
I lined the engine belt pulley up with the "T" on the case, and checked to make sure my piston really was at TDC, and not at BDC.
Then I put in the cam so that the line on the gear was perfectly level and flat. Put the chain on the cam, and installed the two cam shaft holders on the sides. Then I rotated the engine around a couple times with the cam chain tensioner installed, so there was no slack in the chain. When I lined the pulley up with the "T" again, the flat line was still flat like it should be. But kind of feels like the timing is not right.
Tomorrow, I plan to get it started and put a timing light on the engine. But I don't know where the mark on the pulley should be when I point the timing light at it. Does anyone know where it should be??
thanks a lot,
Mike.
-
misterpoopoohead
- Posts: 30
- Joined: Tue Mar 20, 2007 3:34 am
Re: Not sure if my engine cam chain is timed correctly
Thanks Dale. I've been told the notch can be off as well!
Sent from my Verizon Wireless BlackBerry
From:
goinhm@...
Sender:
anzhonda600owners@yahoogroups.com
Date:
Tue, 27 Jul 2010 05:33:12 EDT
To:
ReplyTo:
anzhonda600owners@yahoogroups.com
Subject:
Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
The notch is the more reliable mark on the camshaft. It should be showing in the cam shaft holder (on the oil cap side) when the piston is at TDC. When the notch is showing, all the valves should be closed. While I have seen the scribe on the cam sprocket incorrect, I have never seen the notch on the cam incorrect. Others may have a different experience.
Dale
Sent from my Verizon Wireless BlackBerry
From:
goinhm@...
Sender:
anzhonda600owners@yahoogroups.com
Date:
Tue, 27 Jul 2010 05:33:12 EDT
To:
ReplyTo:
anzhonda600owners@yahoogroups.com
Subject:
Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
The notch is the more reliable mark on the camshaft. It should be showing in the cam shaft holder (on the oil cap side) when the piston is at TDC. When the notch is showing, all the valves should be closed. While I have seen the scribe on the cam sprocket incorrect, I have never seen the notch on the cam incorrect. Others may have a different experience.
Dale
> Its been
> a while since I had a 600 engine apart, but doesn't the cam have a slot cut in > one end that can be seen through the camholder. And that slot should be > straight up when at TDC.
-
blake neilson
- Posts: 0
- Joined: Fri Mar 07, 2008 10:32 am
Re: Not sure if my engine cam chain is timed correctly
Milling the head, or cylinders, or cases will RETARD the cam timing. And milling accuracy has nothing to do with it. Only thicker (by the amount milled) gaskets will compensate.
Blake
Blake
--- On
Tue, 7/27/10, lyletrudell
wrote:
> From: lyletrudell
> Subject: [anzhonda600owners] Re: Not sure if my engine cam chain is timed correctly > To: anzhonda600owners@yahoogroups.com > Date: Tuesday, July 27, 2010, 3:01 PM
> The slot should be the best spot to get cam orientation, it should also be in alignment with the ignition locator pin.
> This is where the cam was located off to grind it.
> The other mark is a casting mark and it might not be right, it may have been used for reference when the rough casting was being machined.
> Problem area:
> This Honda engine, like any over head cam design must be machined accuratly for height between the crank centerline and cam centerline!
> If you or a past owner machined any material off the cam housing, head, cylinders or cases then the cam timing will be advanced. And because our cam gear is not adjustable we are in trouble! Although I did see a cam with an adjustable cam gear somewhere.
> Mike, I can't see how you could be off one tooth on the cam chain and have any of the marks line up. If you know cam specs for this engine, then you could use a degree wheel and check the cam. Your teacher should be able to help you.
> Lyle
> --- In
> anzhonda600owners@yahoogroups.com
> , misterpoopoohead@... wrote:
> > From what I've been told the slot and the straight line are in the wrong place on some cams. They aren't serialized so apparently no way to identify except by looking at them. Sucks, don't it?
> > Kev
> > Sent from my Verizon Wireless BlackBerry
> > -----Original Message-----
> > From: brad fenn
> > Sender:
> anzhonda600owners@yahoogroups.com
> > Date: Mon, 26 Jul 2010 21:20:24
> > To: anzhonda600owners@yahoogroups.com
> > Reply-To:
> anzhonda600owners@yahoogroups.com
> > Subject: Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
> > Its been a while since I had a 600 engine apart, but doesn't the cam have a slot
> > cut in one end that can be seen through the camholder. And that slot should be
> > straight up when at TDC.
> > From: "misterpoopoohead@..."
> > To:
> anzhonda600owners@yahoogroups.com
> > Sent: Mon, July 26, 2010 11:06:27 PM
> > Subject: Re: [anzhonda600owners] Not sure if my engine cam chain is timed
> > correctly
> > Dude. Some cams are marked wrong from the factory. Crazy, but apparently true.
> > Kev
> > Sent from my Verizon Wireless BlackBerry
> > From: "Mega"
> > Sender: anzhonda600owners@ yahoogroups. com
> > Date: Mon, 26 Jul 2010 23:11:01 -0000
> > To:
> > ReplyTo: anzhonda600owners@ yahoogroups. com
> > Subject: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
> > Hi guys,
> > So I got my engine back in the car today and sort of started it. It barely
> > starts at all, and when it does, it runs really rough.
> > I have to retard the timing as much as possible to get it to start. I'm
> > wondering if I set the cam shaft correctly??
> > I lined the engine belt pulley up with the "T" on the case, and checked to make
> > sure my piston really was at TDC, and not at BDC.
> > Then I put in the cam so that the line on the gear was perfectly level and flat.
> > Put the chain on the cam, and installed the two cam shaft holders on the sides.
> > Then I rotated the engine around a couple times with the cam chain tensioner
> > installed, so there was no slack in the chain. When I lined the pulley up with
> > the "T" again, the flat line was still flat like it should be. But kind of
> > feels like the timing is not right.
> > Tomorrow, I plan to get it started and put a timing light on the engine. But I
> > don't know where the mark on the pulley should be when I point the timing light
> > at it. Does anyone know where it should be??
> > thanks a lot,
> > Mike.
-
lyletrudell
- Posts: 56
- Joined: Wed Apr 14, 2010 12:54 pm
Re: Not sure if my engine cam chain is timed correctly
Blake, your right. It will retard the timing...oops.
Will change my post.
Accuracy has everything to do with engines!
Mill the cylinder base off square by .002" from the bores and see how it runs.
The actual distance is not important, but has to be a known accurate dimension.
Any motor that I mill or change, I degree the cam.
Then you check the timing, disassemble, add gasket thickness like Blake said, then reassemble and check.
Most stuff I work on has adjustable cam gears.
Mike, if the past owner machined anything or the chain & sprockets are worn the cam timing would be off.
Just degree it and go from there.
Someone in this club must have done it before, maybe Blake.
Of course this is not a race engine, so it will probably be close enough.
Lyle
Will change my post.
Accuracy has everything to do with engines!
Mill the cylinder base off square by .002" from the bores and see how it runs.
The actual distance is not important, but has to be a known accurate dimension.
Any motor that I mill or change, I degree the cam.
Then you check the timing, disassemble, add gasket thickness like Blake said, then reassemble and check.
Most stuff I work on has adjustable cam gears.
Mike, if the past owner machined anything or the chain & sprockets are worn the cam timing would be off.
Just degree it and go from there.
Someone in this club must have done it before, maybe Blake.
Of course this is not a race engine, so it will probably be close enough.
Lyle
--- In
anzhonda600owners@yahoogroups.com
, blake neilson wrote:
> Milling the head, or cylinders, or cases will RETARD the cam timing. And milling accuracy has nothing to do with it. Only thicker (by the amount milled) gaskets will compensate.
> Blake
> --- On Tue, 7/27/10, lyletrudell wrote:
> From: lyletrudell
> Subject: [anzhonda600owners] Re: Not sure if my engine cam chain is timed correctly
> To:
anzhonda600owners@yahoogroups.com
> Date: Tuesday, July 27, 2010, 3:01 PM
> The slot should be the best spot to get cam orientation, it should also be in alignment with the ignition locator pin.
> This is where the cam was located off to grind it.
> The other mark is a casting mark and it might not be right, it may have been used for reference when the rough casting was being machined.
> Problem area:
> This Honda engine, like any over head cam design must be machined accuratly for height between the crank centerline and cam centerline!
> If you or a past owner machined any material off the cam housing, head, cylinders or cases then the cam timing will be advanced. And because our cam gear is not adjustable we are in trouble! Although I did see a cam with an adjustable cam gear somewhere.
> Mike, I can't see how you could be off one tooth on the cam chain and have any of the marks line up. If you know cam specs for this engine, then you could use a degree wheel and check the cam. Your teacher should be able to help you.
> Lyle
> --- In
anzhonda600owners@yahoogroups.com
, misterpoopoohead@ wrote:
> > From what I've been told the slot and the straight line are in the wrong place on some cams. They aren't serialized so apparently no way to identify except by looking at them. Sucks, don't it?
> > Kev
> > Sent from my Verizon Wireless BlackBerry
> > -----Original Message-----
> > From: brad fenn
> > Sender:
anzhonda600owners@yahoogroups.com
> > Date: Mon, 26 Jul 2010 21:20:24
> > To: > Reply-To:
anzhonda600owners@yahoogroups.com
> > Subject: Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
> > Its been a while since I had a 600 engine apart, but doesn't the cam have a slot
> > cut in one end that can be seen through the camholder. And that slot should be
> > straight up when at TDC.
> > From: "misterpoopoohead@"
> > To:
anzhonda600owners@yahoogroups.com
> > Sent: Mon, July 26, 2010 11:06:27 PM
> > Subject: Re: [anzhonda600owners] Not sure if my engine cam chain is timed
> > correctly
> > Dude. Some cams are marked wrong from the factory. Crazy, but apparently true.
> > Kev
> > Sent from my Verizon Wireless BlackBerry
> > From: "Mega"
> > Sender: anzhonda600owners@ yahoogroups. com
> > Date: Mon, 26 Jul 2010 23:11:01 -0000
> > To:
> > ReplyTo: anzhonda600owners@ yahoogroups. com
> > Subject: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
> > Hi guys,
> > So I got my engine back in the car today and sort of started it. It barely
> > starts at all, and when it does, it runs really rough.
> > I have to retard the timing as much as possible to get it to start. I'm
> > wondering if I set the cam shaft correctly??
> > I lined the engine belt pulley up with the "T" on the case, and checked to make
> > sure my piston really was at TDC, and not at BDC.
> > Then I put in the cam so that the line on the gear was perfectly level and flat.
> > Put the chain on the cam, and installed the two cam shaft holders on the sides.
> > Then I rotated the engine around a couple times with the cam chain tensioner
> > installed, so there was no slack in the chain. When I lined the pulley up with
> > the "T" again, the flat line was still flat like it should be. But kind of
> > feels like the timing is not right.
> > Tomorrow, I plan to get it started and put a timing light on the engine. But I
> > don't know where the mark on the pulley should be when I point the timing light
> > at it. Does anyone know where it should be??
> > thanks a lot,
> > Mike.
-
lyletrudell
- Posts: 56
- Joined: Wed Apr 14, 2010 12:54 pm
Re: Not sure if my engine cam chain is timed correctly
Updated post, want the info to be as accurate as possible.
The slot should be the best spot to get cam orientation, it should also be in alignment with the ignition locator pin. This is where the cam was located off to grind it.
The other mark is a casting mark and it might not be right, it may have been used for reference when the rough casting was being machined.
Problem area:
This Honda engine, like any over head cam design must be machined accuratly from the factory for the height dimension between the crank centerline and cam centerline! This dimension must be maintained!
If you or a past owner machined any material off the cam housing, head, cylinders or cases then the cam timing will be "Retarded".
Also the gaskets must be the stock thickness.
If the timing is off using thicker/thinner gaskets is one way to adjust timing, like Blake said. But you have to check cam timing first to adjust, or know what machining has been done to the engine.
Mike, I can't see how you could be off one tooth on the cam chain and have any of the marks line up. If you know cam specs for this engine, then you could use a degree wheel and check the cam. Your teacher should be able to help you.
Lyle
The slot should be the best spot to get cam orientation, it should also be in alignment with the ignition locator pin. This is where the cam was located off to grind it.
The other mark is a casting mark and it might not be right, it may have been used for reference when the rough casting was being machined.
Problem area:
This Honda engine, like any over head cam design must be machined accuratly from the factory for the height dimension between the crank centerline and cam centerline! This dimension must be maintained!
If you or a past owner machined any material off the cam housing, head, cylinders or cases then the cam timing will be "Retarded".
Also the gaskets must be the stock thickness.
If the timing is off using thicker/thinner gaskets is one way to adjust timing, like Blake said. But you have to check cam timing first to adjust, or know what machining has been done to the engine.
Mike, I can't see how you could be off one tooth on the cam chain and have any of the marks line up. If you know cam specs for this engine, then you could use a degree wheel and check the cam. Your teacher should be able to help you.
Lyle
--- In
anzhonda600owners@yahoogroups.com
, "lyletrudell" wrote:
> Blake, your right. It will retard the timing...oops.
> Will change my post.
> Accuracy has everything to do with engines!
> Mill the cylinder base off square by .002" from the bores and see how it runs.
> The actual distance is not important, but has to be a known accurate dimension.
> Any motor that I mill or change, I degree the cam.
> Then you check the timing, disassemble, add gasket thickness like Blake said, then reassemble and check.
> Most stuff I work on has adjustable cam gears.
> Mike, if the past owner machined anything or the chain & sprockets are worn the cam timing would be off.
> Just degree it and go from there.
> Someone in this club must have done it before, maybe Blake.
> Of course this is not a race engine, so it will probably be close enough.
> Lyle
> --- In
anzhonda600owners@yahoogroups.com
, blake neilson wrote:
> > Milling the head, or cylinders, or cases will RETARD the cam timing. And milling accuracy has nothing to do with it. Only thicker (by the amount milled) gaskets will compensate.
> > Blake
> > --- On Tue, 7/27/10, lyletrudell wrote:
> > From: lyletrudell
> > Subject: [anzhonda600owners] Re: Not sure if my engine cam chain is timed correctly
> > To:
anzhonda600owners@yahoogroups.com
> > Date: Tuesday, July 27, 2010, 3:01 PM
> > The slot should be the best spot to get cam orientation, it should also be in alignment with the ignition locator pin.
> > This is where the cam was located off to grind it.
> > The other mark is a casting mark and it might not be right, it may have been used for reference when the rough casting was being machined.
> > Problem area:
> > This Honda engine, like any over head cam design must be machined accuratly for height between the crank centerline and cam centerline!
> > If you or a past owner machined any material off the cam housing, head, cylinders or cases then the cam timing will be advanced. And because our cam gear is not adjustable we are in trouble! Although I did see a cam with an adjustable cam gear somewhere.
> > Mike, I can't see how you could be off one tooth on the cam chain and have any of the marks line up. If you know cam specs for this engine, then you could use a degree wheel and check the cam. Your teacher should be able to help you.
> > Lyle
> > --- In
anzhonda600owners@yahoogroups.com
, misterpoopoohead@ wrote:
> > > From what I've been told the slot and the straight line are in the wrong place on some cams. They aren't serialized so apparently no way to identify except by looking at them. Sucks, don't it?
> > > Kev
> > > Sent from my Verizon Wireless BlackBerry
> > > -----Original Message-----
> > > From: brad fenn
> > > Sender:
anzhonda600owners@yahoogroups.com
> > > Date: Mon, 26 Jul 2010 21:20:24
> > > To: > > Reply-To:
anzhonda600owners@yahoogroups.com
> > > Subject: Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
> > > Its been a while since I had a 600 engine apart, but doesn't the cam have a slot
> > > cut in one end that can be seen through the camholder. And that slot should be
> > > straight up when at TDC.
> > > From: "misterpoopoohead@"
> > > To:
anzhonda600owners@yahoogroups.com
> > > Sent: Mon, July 26, 2010 11:06:27 PM
> > > Subject: Re: [anzhonda600owners] Not sure if my engine cam chain is timed
> > > correctly
> > > Dude. Some cams are marked wrong from the factory. Crazy, but apparently true.
> > > Kev
> > > Sent from my Verizon Wireless BlackBerry
> > > From: "Mega"
> > > Sender: anzhonda600owners@ yahoogroups. com
> > > Date: Mon, 26 Jul 2010 23:11:01 -0000
> > > To:
> > > ReplyTo: anzhonda600owners@ yahoogroups. com
> > > Subject: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
> > > Hi guys,
> > > So I got my engine back in the car today and sort of started it. It barely
> > > starts at all, and when it does, it runs really rough.
> > > I have to retard the timing as much as possible to get it to start. I'm
> > > wondering if I set the cam shaft correctly??
> > > I lined the engine belt pulley up with the "T" on the case, and checked to make
> > > sure my piston really was at TDC, and not at BDC.
> > > Then I put in the cam so that the line on the gear was perfectly level and flat.
> > > Put the chain on the cam, and installed the two cam shaft holders on the sides.
> > > Then I rotated the engine around a couple times with the cam chain tensioner
> > > installed, so there was no slack in the chain. When I lined the pulley up with
> > > the "T" again, the flat line was still flat like it should be. But kind of
> > > feels like the timing is not right.
> > > Tomorrow, I plan to get it started and put a timing light on the engine. But I
> > > don't know where the mark on the pulley should be when I point the timing light
> > > at it. Does anyone know where it should be??
> > > thanks a lot,
> > > Mike.
Re: Not sure if my engine cam chain is timed correctly and Coil ques
Thanks for the info about the notch on the cam shaft. I re-checked my timing using the notch on the cam and the mark on the belt drive wheel. The timing was right on. I actually got my car to start up and run yesterday. I simply messed with the points a little bit, and installed the rest of the exhaust, and used the choke a little.
It ran pretty well for a while, but then it stopped sparking. A few moments later, my ignition coil litterally pooped and shot smoke and goo out of the side of it. I've ordered a new one.
I'm curious what do most of you use for an ignition coil on your engines?? Mine is an aftermarket Accel Harley Super Coil, part number 140403S.
Is that a good coil to use?? My engine ran ok with it before it exploded.
thanks,
Mike.
It ran pretty well for a while, but then it stopped sparking. A few moments later, my ignition coil litterally pooped and shot smoke and goo out of the side of it. I've ordered a new one.
I'm curious what do most of you use for an ignition coil on your engines?? Mine is an aftermarket Accel Harley Super Coil, part number 140403S.
Is that a good coil to use?? My engine ran ok with it before it exploded.
thanks,
Mike.
--- In
anzhonda600owners@yahoogroups.com
, "lyletrudell" wrote:
> Updated post, want the info to be as accurate as possible.
> The slot should be the best spot to get cam orientation, it should also be in alignment with the ignition locator pin. This is where the cam was located off to grind it.
> The other mark is a casting mark and it might not be right, it may have been used for reference when the rough casting was being machined.
> Problem area:
> This Honda engine, like any over head cam design must be machined accuratly from the factory for the height dimension between the crank centerline and cam centerline! This dimension must be maintained!
> If you or a past owner machined any material off the cam housing, head, cylinders or cases then the cam timing will be "Retarded".
> Also the gaskets must be the stock thickness.
> If the timing is off using thicker/thinner gaskets is one way to adjust timing, like Blake said. But you have to check cam timing first to adjust, or know what machining has been done to the engine.
> Mike, I can't see how you could be off one tooth on the cam chain and have any of the marks line up. If you know cam specs for this engine, then you could use a degree wheel and check the cam. Your teacher should be able to help you.
> Lyle
> --- In
anzhonda600owners@yahoogroups.com
, "lyletrudell" wrote:
> > Blake, your right. It will retard the timing...oops.
> > Will change my post.
> > Accuracy has everything to do with engines!
> > Mill the cylinder base off square by .002" from the bores and see how it runs.
> > The actual distance is not important, but has to be a known accurate dimension.
> > Any motor that I mill or change, I degree the cam.
> > Then you check the timing, disassemble, add gasket thickness like Blake said, then reassemble and check.
> > Most stuff I work on has adjustable cam gears.
> > Mike, if the past owner machined anything or the chain & sprockets are worn the cam timing would be off.
> > Just degree it and go from there.
> > Someone in this club must have done it before, maybe Blake.
> > Of course this is not a race engine, so it will probably be close enough.
> > Lyle
> > --- In
anzhonda600owners@yahoogroups.com
, blake neilson wrote:
> > > Milling the head, or cylinders, or cases will RETARD the cam timing. And milling accuracy has nothing to do with it. Only thicker (by the amount milled) gaskets will compensate.
> > > Blake
> > > --- On Tue, 7/27/10, lyletrudell wrote:
> > > From: lyletrudell
> > > Subject: [anzhonda600owners] Re: Not sure if my engine cam chain is timed correctly
> > > To:
anzhonda600owners@yahoogroups.com
> > > Date: Tuesday, July 27, 2010, 3:01 PM
> > > The slot should be the best spot to get cam orientation, it should also be in alignment with the ignition locator pin.
> > > This is where the cam was located off to grind it.
> > > The other mark is a casting mark and it might not be right, it may have been used for reference when the rough casting was being machined.
> > > Problem area:
> > > This Honda engine, like any over head cam design must be machined accuratly for height between the crank centerline and cam centerline!
> > > If you or a past owner machined any material off the cam housing, head, cylinders or cases then the cam timing will be advanced. And because our cam gear is not adjustable we are in trouble! Although I did see a cam with an adjustable cam gear somewhere.
> > > Mike, I can't see how you could be off one tooth on the cam chain and have any of the marks line up. If you know cam specs for this engine, then you could use a degree wheel and check the cam. Your teacher should be able to help you.
> > > Lyle
> > > --- In
anzhonda600owners@yahoogroups.com
, misterpoopoohead@ wrote:
> > > > From what I've been told the slot and the straight line are in the wrong place on some cams. They aren't serialized so apparently no way to identify except by looking at them. Sucks, don't it?
> > > > Kev
> > > > Sent from my Verizon Wireless BlackBerry
> > > > -----Original Message-----
> > > > From: brad fenn
> > > > Sender:
anzhonda600owners@yahoogroups.com
> > > > Date: Mon, 26 Jul 2010 21:20:24
> > > > To: > > > Reply-To:
anzhonda600owners@yahoogroups.com
> > > > Subject: Re: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
> > > > Its been a while since I had a 600 engine apart, but doesn't the cam have a slot
> > > > cut in one end that can be seen through the camholder. And that slot should be
> > > > straight up when at TDC.
> > > > From: "misterpoopoohead@"
> > > > To:
anzhonda600owners@yahoogroups.com
> > > > Sent: Mon, July 26, 2010 11:06:27 PM
> > > > Subject: Re: [anzhonda600owners] Not sure if my engine cam chain is timed
> > > > correctly
> > > > Dude. Some cams are marked wrong from the factory. Crazy, but apparently true.
> > > > Kev
> > > > Sent from my Verizon Wireless BlackBerry
> > > > From: "Mega"
> > > > Sender: anzhonda600owners@ yahoogroups. com
> > > > Date: Mon, 26 Jul 2010 23:11:01 -0000
> > > > To:
> > > > ReplyTo: anzhonda600owners@ yahoogroups. com
> > > > Subject: [anzhonda600owners] Not sure if my engine cam chain is timed correctly
> > > > Hi guys,
> > > > So I got my engine back in the car today and sort of started it. It barely
> > > > starts at all, and when it does, it runs really rough.
> > > > I have to retard the timing as much as possible to get it to start. I'm
> > > > wondering if I set the cam shaft correctly??
> > > > I lined the engine belt pulley up with the "T" on the case, and checked to make
> > > > sure my piston really was at TDC, and not at BDC.
> > > > Then I put in the cam so that the line on the gear was perfectly level and flat.
> > > > Put the chain on the cam, and installed the two cam shaft holders on the sides.
> > > > Then I rotated the engine around a couple times with the cam chain tensioner
> > > > installed, so there was no slack in the chain. When I lined the pulley up with
> > > > the "T" again, the flat line was still flat like it should be. But kind of
> > > > feels like the timing is not right.
> > > > Tomorrow, I plan to get it started and put a timing light on the engine. But I
> > > > don't know where the mark on the pulley should be when I point the timing light
> > > > at it. Does anyone know where it should be??
> > > > thanks a lot,
> > > > Mike.