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10-22-2016, 07:25 PM
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#1
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Junior Member
Join Date: Oct 2016
Posts: 14
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1996 454 exhaust gasket
I had two bolts break on my exhaust. I got the bolts out with some heat and large hammer. I found the bolts but this gasket has stumped every auto parts store. Anyone have any suggestions or maybe know a number to cross reference?
1996 Pace Arrow
Chevy 454
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10-22-2016, 07:50 PM
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#2
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Senior Member
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,925
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Why not buy exhaust gasket material and cut your own? You've got more than enough of the old one to make a pattern.
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Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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10-22-2016, 07:55 PM
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#3
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Junior Member
Join Date: Oct 2016
Posts: 14
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I was using that as a last resort. I've never cut my own before so a bit intimidated.
I just googled gasket maker again. Which brand would you suggest? There are so many.
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10-22-2016, 09:20 PM
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#4
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Senior Member
Join Date: Mar 2016
Posts: 349
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Bill
1991 Winnebago Warrior 23EC Class A
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10-22-2016, 09:47 PM
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#5
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Senior Member
Country Coach Owners Club
Join Date: Jun 2013
Posts: 608
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Permatex makes a product called Rightstuff, we use it at work on exhaust connections all the time, we also use it for header gasket material on the race car.
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1997 Country Coach Intrigue Horizon 36' (The Dinosaur Burner)
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10-22-2016, 11:33 PM
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#6
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Community Administrator
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Sep 2010
Location: Marquette, Michigan "Da UP" & Lehigh Acres Florida
Posts: 21,822
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Have you tried your local Chevy garage especially since you have the old one for a sample?
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John & Cathy R.
06 Pace Arrow 38L Workhorse W24
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10-23-2016, 05:08 AM
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#7
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Senior Member
Newmar Owners Club Winnebago Owners Club Freightliner Owners Club
Join Date: Mar 2016
Location: Kingman Az
Posts: 1,686
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When I did the main exhaust manifold gaskets on my 98 454 I found that the Failaatex failed in less than a year and had to pull them off. I had to go directly to a chevy dealer for the correct stainless steel part. The cheapo's were $15 for a set, the stainless chevy parts were $70 for a set. They are still working perfectly. I've made many gaskets, but there is no way I could make these. As much as I like to save a buck, I would recommend that you bite the bullet and get the more expensive ones. Good luck....
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May your black water hose never break!
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10-23-2016, 06:05 AM
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#8
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Senior Member
Join Date: Apr 2004
Posts: 3,773
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This part is not for a 454 (7.4L)
"Football shaped flange gasket, fits 4.3L, 4.8L, 5.7L and 6.0L"
Quote:
Originally Posted by bill06447
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__________________
George Schweikle Lexington, KY
2005 Safari (Monaco)Trek 28RB2, Workhorse W20, 8.1, Allison 1000 5 spd, UltraPower engine & tranny, Track bars & sway bars, KONI FSD, FMCA 190830, Safari Int'l. chapter. 1999 Safari Trek 2830, 1995 Safari Trek 2430, 1983 Winnebago Chieftain, 1976 Midas Mini
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10-23-2016, 06:42 AM
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#9
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Senior Member
Workhorse Chassis Owner
Join Date: Sep 2007
Location: st.charles mo.
Posts: 1,482
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Why not just use Permatex high temp RTV sealant. It is used in many high peformance aplications like headers and exhaust connections.
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10-23-2016, 05:06 PM
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#10
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Senior Member
Join Date: Mar 2016
Posts: 349
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Quote:
Originally Posted by George Schweikle
This part is not for a 454 (7.4L)
"Football shaped flange gasket, fits 4.3L, 4.8L, 5.7L and 6.0L"
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It's the same size and will work. I have the same one on my 91 454.
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Bill
1991 Winnebago Warrior 23EC Class A
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10-23-2016, 06:51 PM
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#11
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Junior Member
Join Date: Oct 2016
Posts: 14
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I see your point here based on the webpage. But it is the shape and size of my gasket and they have the Y pipe and catalytic converter pipes listed also. May be worth a call.
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10-24-2016, 07:15 AM
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#12
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Senior Member
Newmar Owners Club Winnebago Owners Club Freightliner Owners Club
Join Date: Mar 2016
Location: Kingman Az
Posts: 1,686
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Quote:
Originally Posted by George Schweikle
This part is not for a 454 (7.4L)
"Football shaped flange gasket, fits 4.3L, 4.8L, 5.7L and 6.0L"
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Looks like the correct one to me for a 454. But comparing parts is the only way to be sure. AND my point is that chevy used some very exotic parts on the P30 chassis to insure longevity.
__________________
May your black water hose never break!
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10-24-2016, 08:35 AM
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#13
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Senior Member
Join Date: Apr 2004
Posts: 3,773
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Good information that the Mill Supply website isn't accurate, especially for someone finding this thread to address the same problem.
Also, I kinda wonder how, or if, the exhaust changed as the 454 engine transitioned from carburetor, to throttle body, to port fuel injection. I heard somewhere the Vortec engine had cast Stainless steel exhaust manifolds as these are less likely to crack than the older cast iron versions. True, or urban legend?
Quote:
Originally Posted by bill06447
It's the same size and will work. I have the same one on my 91 454.
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__________________
George Schweikle Lexington, KY
2005 Safari (Monaco)Trek 28RB2, Workhorse W20, 8.1, Allison 1000 5 spd, UltraPower engine & tranny, Track bars & sway bars, KONI FSD, FMCA 190830, Safari Int'l. chapter. 1999 Safari Trek 2830, 1995 Safari Trek 2430, 1983 Winnebago Chieftain, 1976 Midas Mini
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10-24-2016, 05:59 PM
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#14
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Senior Member
Join Date: Mar 2016
Posts: 349
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I doubt the system on my 91 is factory-the Winnebago parts manual lists different pipes and the P-series parts book for 91-92 shows a different exhaust system than this. The O2 sensor is down next to the flange in a collector where stock 454 has it in the manifold up near the engine. But the dual cats are identical to the ones shown on the Mill Supply site, emptying into two large mufflers and (apparently) custom bent and welded tailpipes that exit ahead of the drivers rear wheels.
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Bill
1991 Winnebago Warrior 23EC Class A
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