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#1 |
Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
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collector leak
I have an old nasty set of headers on my truck. I have been hearing a leak somewere. the collector gaskets looked bad replaced the one I thought was leaking with an aluminum one. Fired it up not as loud but I can still feel the air puffing out on one side of collector. I can not get it any tighter. I pulled it all apart and I can see in the aluminum gasket that the one side was not pressed into the gasket hard enuf to make an indention. I am planing on getting new headers put it will have to wait a while and I would like to fix this is there anything I can try? double gasket? one aluminum one reg? Any thoughts would help, it also seems the rings are bent somewhat I think I can straighten them some with some c clamps if that would help.
Second question if I can not fix it will it hurt anything other than sound anoying? Thanks
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#2 |
Prestige member Old Farts Club
Join Date: Nov 2005
Location: Cleveland
Posts: 502
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Re: collector leak
try a double regular gasket with ultra copper sealant generously applied-it is a rigged way to do it but in an emergency it might work for a while. I just installed a new set of headers and I'm trying the new carbon gaskets from Percy's (available from summit racing) we'll see how well they work
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#3 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: collector leak
Are these the 1/4 inch dead soft alluminum gaskets? If not... get some. They will seal anything, and you can use them over and over and over... I used the same set on 2 trucks, 3 engines, and god knows how many R&R on the pipes/headers for one reason or another.
There will be no adverse effects from a small (or even large) exhaust leak. |
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#4 |
Registered User
![]() Join Date: Apr 2006
Location: hopeless in Washington
Posts: 105
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Re: collector leak
go to a muffler shop, they usually have the REAL THICK ones. The ones I use are about 3/16", they'll seal well and last. I put on an old set I had 2 years ago and still no leaks.
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'69 Chevy CST#'s 396/TH400, A/C |
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#5 | |
Registered User
Join Date: Oct 2006
Location: Cheney, KS
Posts: 669
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Re: collector leak
You didnt over tighten them and warp the thin flimsy collectors did you?
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#6 |
Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
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Re: collector leak
The ring on the collector looks warped but not the flange wonder if I use c clamps while I tightned them would help.
the aluminum gasket I had was 1/8 inch thick they make 1/4 inch thick ones?
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#7 | |
Registered User
Join Date: Oct 2006
Location: Cheney, KS
Posts: 669
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Re: collector leak
If they're easy to get to, try to experiment.
Ive had the best luck with the cheap paper gaskets, and use the red High Temp Permatex on both sides.
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#8 |
Registered User
Join Date: Feb 2007
Location: Winston Salem, NC
Posts: 310
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Re: collector leak
I had the same problem after the motor swap on the gmc. I took the flange off the old collecters and used them as a gasket, worked great.
Something you might try, real cheap if you happen to have an old set laying around
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#9 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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Re: collector leak
Did you examine your exhaust pipes?. Start at the collector and work your way back, use a mirror if you have to and inspect wherever there is a joint. If you see black marks that looks like spray it verifies a leak. Hopefully the welds on the collectors themselves are not broken.
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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