I am cleaning up my recently purchased engine before installing it. I am pulling off the exhaust header and plan to sandblast and paint it. Besides all the rust, I see that there is a 1/8 inch thick layer of some sort of insulation/paint/something on it, which is flaking off in big chunks. See the picture...
http://www.honda600coupe.com/new_engine_from_sedan.jpg
What shall I do about this stuff? Certainly sandblasting will make it all go away, but should it be replaced with a similar coating, or should I just use a high temp black paint and be done with it? By the way, I intend to remove, clean and replace it as a unit, brackets and all. I do not want to have to deal with seals that I don't have to mess with.
I notice that the heat shields on either side of the engine have a similar, lumpy black coating, but in better shape. Should I attempt to leave this in place?
Steve
cleaning up exhaust headers
Re: cleaning up exhaust headers
Pretty much when the engine is in the car you can't see the heater
parts. More importantly is the fins on the inside of the heat
exchanger. Many times they are loose or missing and make noise or the
heater is insufficient. I would just lightly sandblast the pipes and
paint black with high temp paint. The front pipes get so hot the
paint usually burns off.
If you are not going to dismantle the pipes, I hope you never plan to
do a clutch job with the engine in car. Those bolts get rusted into
the heat exchanger and a a bear to get out, they usually snap off.
You will may have a difficult time reinstalling the vibration washers
between the larger bracket and the clutch cover, if for some reason
you opt not to use the original bolts keep in mind too long of a top
bolt will interfere with the clutch rotation.
Miles
PS, sounds like you old engine threw a rod, may not have actually
gone thru the cases but.....
parts. More importantly is the fins on the inside of the heat
exchanger. Many times they are loose or missing and make noise or the
heater is insufficient. I would just lightly sandblast the pipes and
paint black with high temp paint. The front pipes get so hot the
paint usually burns off.
If you are not going to dismantle the pipes, I hope you never plan to
do a clutch job with the engine in car. Those bolts get rusted into
the heat exchanger and a a bear to get out, they usually snap off.
You will may have a difficult time reinstalling the vibration washers
between the larger bracket and the clutch cover, if for some reason
you opt not to use the original bolts keep in mind too long of a top
bolt will interfere with the clutch rotation.
Miles
PS, sounds like you old engine threw a rod, may not have actually
gone thru the cases but.....
Re: cleaning up exhaust headers
I got all the bolts off OK, and bagged and labelled them for re-use. I
discovered that it is pretty much impossible to remove the heat
exchanger/exhaust pipes with separating them into two parts. In one piece,
the combination of the clutch lever in the back and the bolts in the front,
blocks the removal. The seal found between them is solid and reusable,
fortunately.
The fins seem OK - not loose, no rattle. I will not worry about replacing
the eighth-inch thick insulation, or whatever it was, around the heat
exchanger. Here is another picture of the stuff...
http://www.honda600coupe.com/thick_and_ ... lation.jpg Could it be
asbestos?
Vibration washers between the larger bracket and the clutch cover? They
look like regular washers to me...just plain steel. I see that the heat
shields have rubber washers - but they are disintegrating. Is there an
easy-to-find replacement for those?
Steve
discovered that it is pretty much impossible to remove the heat
exchanger/exhaust pipes with separating them into two parts. In one piece,
the combination of the clutch lever in the back and the bolts in the front,
blocks the removal. The seal found between them is solid and reusable,
fortunately.
The fins seem OK - not loose, no rattle. I will not worry about replacing
the eighth-inch thick insulation, or whatever it was, around the heat
exchanger. Here is another picture of the stuff...
http://www.honda600coupe.com/thick_and_ ... lation.jpg Could it be
asbestos?
Vibration washers between the larger bracket and the clutch cover? They
look like regular washers to me...just plain steel. I see that the heat
shields have rubber washers - but they are disintegrating. Is there an
easy-to-find replacement for those?
Steve
Re: cleaning up exhaust headers
I got an off-group reply to my note below ...I hope Bruce doesn't mind that
I reprint it here...
Hi Steve,
That stuff is sound deadener. Helps keep the noise in the engine and
exhaust. If it all comes off then there will be more noise in the engine
compartment and therefore more in the passenger compartment. There may
be some kind of replacement stuff in a can from Eastwood Company. They
can be found on the net. If you don't mind the little bit of extra noise
then just spray the parts with High Temp Barbeque paint.
Bruce
I looked at Eastwood and found no sound deadeners for exhaust systems, but I
did find this stuff, which is essentially insulation to keep in the heat...
http://www.eastwoodco.com/itemdy00.asp? ... &Dep_Key1=
A question for the group... who has a coupe or sedan with a
sandblasted-and-painted exhaust header and heat exchanger? Any heat-related
problems? How could you tell if a problem was heat related anyway? It
seems that the Eastwood kit is intended to protect electronic components
from heat, and most of the electrical stuff on the Coupe is on the OTHER
side of the engine bay (now I guess I know why!)
Steve
I reprint it here...
Hi Steve,
That stuff is sound deadener. Helps keep the noise in the engine and
exhaust. If it all comes off then there will be more noise in the engine
compartment and therefore more in the passenger compartment. There may
be some kind of replacement stuff in a can from Eastwood Company. They
can be found on the net. If you don't mind the little bit of extra noise
then just spray the parts with High Temp Barbeque paint.
Bruce
I looked at Eastwood and found no sound deadeners for exhaust systems, but I
did find this stuff, which is essentially insulation to keep in the heat...
http://www.eastwoodco.com/itemdy00.asp? ... &Dep_Key1=
A question for the group... who has a coupe or sedan with a
sandblasted-and-painted exhaust header and heat exchanger? Any heat-related
problems? How could you tell if a problem was heat related anyway? It
seems that the Eastwood kit is intended to protect electronic components
from heat, and most of the electrical stuff on the Coupe is on the OTHER
side of the engine bay (now I guess I know why!)
Steve