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#1 |
Senior Member
![]() Join Date: Apr 2003
Location: Howard, Kansas USA
Posts: 1,997
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exhaust manafold question
I just swapped out my single stock exhaust for a dual setup i got off another truck. I took my time and put it on right, but now there is a bad leak right around the manafolds where they meet the exhaust. Is there a gasket of some kind of forgot, or is there a trick that i didn't know about. Any help would be appreciated, i'm really wondering what is going on here.
thanks David
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1969 K10 Custom 10 1997 Z71 2006 Volkswagen Jetta TDI 2006 King Ranch 1980 Wife |
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#2 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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The exhaust manifolds that were set up with heat risers did not have an internal chamfer on them and the exhaust doughnuts will not seat very well against a flat surface. I am not sure if this is the situation that you have, but it is all that I can think of based on your description.
Jim |
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#3 |
Senior Member
![]() Join Date: Apr 2003
Location: Howard, Kansas USA
Posts: 1,997
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Yeah, they are set up with heat risers, should i try red silicone, or is there something else?
Thanks David
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1969 K10 Custom 10 1997 Z71 2006 Volkswagen Jetta TDI 2006 King Ranch 1980 Wife |
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#4 |
Semi-Senior Member
Join Date: Feb 2003
Location: Washington, MO
Posts: 390
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Speaking of heat risers, is your truck set up the same as the one you took it off of? 67-68s had the riser on the left side, 69-70s had it on the right side, and 72 didn't use on at all. If your's isn't the same, it could be putting the pipe at a different anlge and not be able to seal.
Steve
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'68 50th Anniversery LWB Custom Fleetside, '77 305 v-8, turbo 350, factory speed alert (still works), '71 drivetrain w/front discs. Some call it ugly yellow, others call it Ochre '83 Jeep CJ-7, <80,000 miles, original owner '04 Chevy Suburban, 4x4, 2500, 6.0 ltr, Predator Diablo programmer '95 GMC K1500 Extended cab |
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#5 |
Senior Member
![]() Join Date: Apr 2003
Location: Howard, Kansas USA
Posts: 1,997
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The truck i put the exhaust on is a 69, the truck i took the exhaust off of is a 70, but i think it had a later model 350 in it. You might be on to something there, thanks 68 speedalert
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1969 K10 Custom 10 1997 Z71 2006 Volkswagen Jetta TDI 2006 King Ranch 1980 Wife |
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#6 |
Senior Member
Join Date: Jan 2000
Location: Cincinnati, Ohio
Posts: 1,492
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This is what the bottom of one with a heat riser looks like
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#7 |
Senior Member
Join Date: Jan 2000
Location: Cincinnati, Ohio
Posts: 1,492
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This is the heat riser and the gasket that goes between them.
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#8 |
Senior Member
Join Date: Jan 2000
Location: Cincinnati, Ohio
Posts: 1,492
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On the other side of the heat riser you should have a little piece of pipe with the donut around it. A lot of people don't remember that little piece of pipe and the donut will blow out in time. GM used this little piece from the factory.
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#9 |
Semi-Senior Member
Join Date: Feb 2003
Location: Washington, MO
Posts: 390
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Good posts Dean!
Steve
__________________
'68 50th Anniversery LWB Custom Fleetside, '77 305 v-8, turbo 350, factory speed alert (still works), '71 drivetrain w/front discs. Some call it ugly yellow, others call it Ochre '83 Jeep CJ-7, <80,000 miles, original owner '04 Chevy Suburban, 4x4, 2500, 6.0 ltr, Predator Diablo programmer '95 GMC K1500 Extended cab |
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