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#1 |
Registered User
Join Date: Mar 2014
Location: Wichita
Posts: 518
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5.3 exhaust manifold o-ring?
Hey guys,
I need help identifying my exhaust manifold gasket o-ring. Not a donut. This is the o-ring that goes at the bottom of the exhaust manifold before the exhaust pipe. The engine is a 5.3 from 2004 Buick Rainer AWD. I thought I had it found, but the one I purchased is too large. Guy at the local GM parts counter said the one I have was used on all 5.3s from 99-on. See pics. I appreciate the help guys. |
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#2 |
Moderator
![]() Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,194
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Re: 5.3 exhaust manifold o-ring?
I believe the O ring gasket is GM 15077362 retails for $12 odd....
https://www.gmpartsstore.com/oem-par...iABEgJ5gPD_BwE ![]() ![]() ![]()
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Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox ![]() ![]() ![]() |
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#3 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,927
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Re: 5.3 exhaust manifold o-ring?
I've never seen but one size on the 5.3. Is it a little bit too large? I've had them where the seem to be 1/16 to 1/8 inch too large, but I've never had them leak once I torque them down.
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I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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#4 |
Senior Member
![]() Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,234
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Re: 5.3 exhaust manifold o-ring?
Felpro 61323
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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#5 |
Registered User
Join Date: Mar 2014
Location: Wichita
Posts: 518
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Re: 5.3 exhaust manifold o-ring?
Gentlemen,
Wanted to say thank you. You were all correct. At first, I thought I had already removed the gasket, and the actual o-ring was supposed to fit down in that groove between the o-ring and the inner tube. It took a friend to show me I hadn't actually removed the gasket, and I did have the correct part. Wanted to say thanks again. |
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#6 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,927
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Re: 5.3 exhaust manifold o-ring?
I'm glad it worked out for you.
__________________
I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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#7 |
Registered User
Join Date: May 2017
Location: Cadtor Alberta Canada
Posts: 1
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Re: 5.3 exhaust manifold o-ring?
I bought some cheap manifolds for my ls swap. Exhaust Manifold Kit 9988-R-BLEM . The flanges to bolt onto manifolds came with whats looks and feels like rubber orings. Have i smoked to much happy lettuce or is this legit to use?? Thanks for the thread great advice.
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#8 |
Registered User
Join Date: Mar 2014
Location: Wichita
Posts: 518
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Re: 5.3 exhaust manifold o-ring?
I will say that this o-ring doesn't necessarily "feel" like metal, but definitely is metal of some kind. The old one was darker too, so it looked even more like not-metal.
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#9 |
Registered User
Join Date: Jan 2013
Location: Buffalo Gap, TX
Posts: 229
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Re: 5.3 exhaust manifold o-ring?
Random input, my 2000 Silverado 5.3 has two different gaskets - one side is the mettalic one pictures above, the other is a much bigger "insert" donut.
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My Chevy Truck Project Build Thread '62 Ranchero - 200 I6, 3-on-the-tree, power nothing. '71 LeSabre - 455 Stage 1, power everything. |
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#10 |
Registered User
Join Date: Mar 2014
Location: Wichita
Posts: 518
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Re: 5.3 exhaust manifold o-ring?
Same here
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