[C1] Exhaust Manifold excessive temp
#22
Team Owner
Member Since: Mar 2003
Location: Greenville, Indiana
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I think he didn't get the answer he was looking for and left?
#24
Team Owner
Member Since: Mar 2003
Location: Greenville, Indiana
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Maybe the neighbor's kid stuffed a potato up your tail pipe?
#25
Race Director
Changing the thermostat to a 160 degree is NOT going to lower the temperature. It will only cause the thermostat to open sooner and circulate coolant....but the end will still be the same given enough run time.
Because the only thing you are changing is when the thermostat is opening....and IF the coolant systems till has issues... it will still go up to the temps where it was....because once the thermostat is fully open...it no longer is a factor in this equation.
DUB
Because the only thing you are changing is when the thermostat is opening....and IF the coolant systems till has issues... it will still go up to the temps where it was....because once the thermostat is fully open...it no longer is a factor in this equation.
DUB
#26
Race Director
Oh heck. I though the the OP would still be around to see these photos of an exhaust manifold I had replaced a long time ago.
In the last photo you can see how much the manifold is bulging out.
CLEARLY and oh so 'Captain Obvious' that there was something wrong that caused this.
DUB
In the last photo you can see how much the manifold is bulging out.
CLEARLY and oh so 'Captain Obvious' that there was something wrong that caused this.
DUB
#27
Team Owner
Member Since: Mar 2003
Location: Greenville, Indiana
Posts: 26,118
Received 1,843 Likes
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Changing the thermostat to a 160 degree is NOT going to lower the temperature. It will only cause the thermostat to open sooner and circulate coolant....but the end will still be the same given enough run time.
Because the only thing you are changing is when the thermostat is opening....and IF the coolant systems till has issues... it will still go up to the temps where it was....because once the thermostat is fully open...it no longer is a factor in this equation.
DUB
Because the only thing you are changing is when the thermostat is opening....and IF the coolant systems till has issues... it will still go up to the temps where it was....because once the thermostat is fully open...it no longer is a factor in this equation.
DUB
But considering the unknowns that the OP hasn't addressed..................
Last edited by MikeM; 04-23-2018 at 06:18 PM.
#28
Race Director
Because as you very well know..not all repairs are 'cut and dry'.
DUB
Last edited by DUB; 04-23-2018 at 06:35 PM.
#29
Safety Car
Oh heck. I though the the OP would still be around to see these photos of an exhaust manifold I had replaced a long time ago.
In the last photo you can see how much the manifold is bulging out.
CLEARLY and oh so 'Captain Obvious' that there was something wrong that caused this.
DUB
In the last photo you can see how much the manifold is bulging out.
CLEARLY and oh so 'Captain Obvious' that there was something wrong that caused this.
DUB
#31
Race Director
#32
Safety Car
It was a dealer installed option that would cause the engine exhaust to play the Civil War "charge" call. On the opposite manifold, one could opt to install another device which would play "taps". If The exhaust crossover was plugged, then both would play WWII German war marches in 2 keys.
Last edited by 65tripleblack; 04-24-2018 at 09:17 AM.
#33
Advanced
Thread Starter
exhaust heat high
Dave,
You might try a vacuum advance distributor and connect the vacuum advance to a full manifold source. This additional timing at idle speeds may reduce the temperature of the exhaust because the combustion process is started earlier so the heat energy pushes on the piston instead of being pushed out the exhaust.
You might try a vacuum advance distributor and connect the vacuum advance to a full manifold source. This additional timing at idle speeds may reduce the temperature of the exhaust because the combustion process is started earlier so the heat energy pushes on the piston instead of being pushed out the exhaust.
#36
Race Director
#37
Advanced
Thread Starter
The premise seems to be that if your engine exhaust manifolds are running above 450* there is something wrong.
In 50 years of working on all manner of cars, motorcycles and boats, old and new, I never felt the need to measure exhaust manifold temperature. In fact, I don’t remember anyone that did. Largely because there wasn’t an easy way to do it for the home hobbyist. So, nobody worried about it.
So now we have this guy swapping parts with no other symptom of abnormality except what’s based on an internet opinion of what is normal exhaust temperature.
Yeah, I totally get it.
In 50 years of working on all manner of cars, motorcycles and boats, old and new, I never felt the need to measure exhaust manifold temperature. In fact, I don’t remember anyone that did. Largely because there wasn’t an easy way to do it for the home hobbyist. So, nobody worried about it.
So now we have this guy swapping parts with no other symptom of abnormality except what’s based on an internet opinion of what is normal exhaust temperature.
Yeah, I totally get it.