Collector Gaskets? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

79BIG10 · 09-18-2005, 03:15 PM

Anybody found any luck with some good thick collector gaskets? My driver side keeps leaking on me. The flange looks good and it's tight all the way around. I've been using aluminum 1/8" thick gaskets you get at O'Rilley's and they will last for a few days but then keep leaking. Anybody got a solution of another gasket other than welding them up?

kelsfine69 · 09-18-2005, 03:24 PM

I got the grey paper with metal inside and never had a problem, even reused them once. Another option is cuttin off the flange and using a big slip clamp like they use on Big trucks

79BIG10 · 09-18-2005, 03:28 PM

I've had those when I first mounted the headers and didn't last too long. Then I went to these and lasted for a long time but just in past few weeks been getting worse.

**N2TRUX** · 09-18-2005, 08:14 PM

Is there another reason they keep leaking? Maybe you have an exhaust mount that is broken causing excessive flex in the system....

SSC's76 · 09-18-2005, 08:20 PM

I use the Percy gaskets all around, Flowtech dead soft aluminum are the same thing. If I remember right the collector flange gaskets were $18 at Advanced and they come with new bolts.

plumbcut · 09-18-2005, 08:40 PM

ive had good luck doubling up the mr gasket paper (?) ones on each side....

pc

piecesparts · 09-18-2005, 09:11 PM

Use FELPRO collector gaskets, double up the gaskets and coat them with "CopperCoat" gasket sealer. The sealer will give a coating that makes them seal and last longer.

79BIG10 · 09-19-2005, 12:52 AM

Quote:

Originally Posted by N2TRUX

Is there another reason they keep leaking? Maybe you have an exhaust mount that is broken causing excessive flex in the system....

Ken I haven't thought about that. It did start leaking after I changed mufflers but the pipes only changed after the X pipe but now that you mention it the hangers were changed out. I may have to check that out. Time to break out the welder

79BIG10 · 09-19-2005, 12:54 AM

I've thought about doubling up but the trouble is that it's hard to get one in there and even harder to double up but I may have to if the flex is not the problem.

09-18-2005, 03:15 PM	#1
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,775	Collector Gaskets? Anybody found any luck with some good thick collector gaskets? My driver side keeps leaking on me. The flange looks good and it's tight all the way around. I've been using aluminum 1/8" thick gaskets you get at O'Rilley's and they will last for a few days but then keep leaking. Anybody got a solution of another gasket other than welding them up? __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

09-18-2005, 03:24 PM	#2
kelsfine69 18 Till I Die Join Date: Mar 2005 Location: Alberta, Canada Posts: 1,522	I got the grey paper with metal inside and never had a problem, even reused them once. Another option is cuttin off the flange and using a big slip clamp like they use on Big trucks __________________ 2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home...

09-18-2005, 03:28 PM	#3
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,775	I've had those when I first mounted the headers and didn't last too long. Then I went to these and lasted for a long time but just in past few weeks been getting worse. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

09-18-2005, 08:14 PM	#4
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Is there another reason they keep leaking? Maybe you have an exhaust mount that is broken causing excessive flex in the system.... __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

09-18-2005, 08:20 PM	#5
SSC's76 No No Join Date: Jun 2005 Location: Pueblo Colorado Posts: 1,781	I use the Percy gaskets all around, Flowtech dead soft aluminum are the same thing. If I remember right the collector flange gaskets were $18 at Advanced and they come with new bolts. __________________ 1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler

09-18-2005, 08:40 PM	#6
plumbcut california fill Join Date: Apr 2004 Location: Sunny So-Cal Posts: 694	ive had good luck doubling up the mr gasket paper (?) ones on each side.... pc

09-18-2005, 09:11 PM	#7
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Use FELPRO collector gaskets, double up the gaskets and coat them with "CopperCoat" gasket sealer. The sealer will give a coating that makes them seal and last longer.

09-19-2005, 12:54 AM	#9
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,775	I've thought about doubling up but the trouble is that it's hard to get one in there and even harder to double up but I may have to if the flex is not the problem. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson



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