426 hemi valve covers leaking?
#2656995
05/19/19 07:37 PM
05/19/19 07:37 PM
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Joined: Jan 2004
Posts: 1,468 N.Y.
sixpacksteve
OP
pro stock
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OP
pro stock
Joined: Jan 2004
Posts: 1,468
N.Y.
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My car came with 2 cork gaskets on covers. i had to change the head gaskets so i put 2 new cork gaskets back twice and still won't stop leaking! even put a little rtv. any suggestions?
Hell Hath No Fury Like Mine
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Re: 426 hemi valve covers leaking?
[Re: sixpacksteve]
#2657000
05/19/19 07:58 PM
05/19/19 07:58 PM
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Joined: Jan 2008
Posts: 3,886 Lost and Spaced
bboogieart
master
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master
Joined: Jan 2008
Posts: 3,886
Lost and Spaced
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Why would it need 2 gaskets? I have always used cork on valve covers. Make sure everything is clean and flat. Sometimes a little silly cone to fill gaps. Cork is a soft materiel don't over tighten.
Last edited by bboogieart; 05/19/19 08:01 PM. Reason: ?
I have mechanical Aptitude. I can screw up anything.
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Re: 426 hemi valve covers leaking?
[Re: bboogieart]
#2657002
05/19/19 08:07 PM
05/19/19 08:07 PM
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Joined: Jan 2004
Posts: 1,468 N.Y.
sixpacksteve
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OP
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i was just coping what was on the car! and didn't want any problems.
Hell Hath No Fury Like Mine
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Re: 426 hemi valve covers leaking?
[Re: sixpacksteve]
#2657009
05/19/19 08:16 PM
05/19/19 08:16 PM
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Joined: Jan 2008
Posts: 3,886 Lost and Spaced
bboogieart
master
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master
Joined: Jan 2008
Posts: 3,886
Lost and Spaced
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I understand. Problem is you might have been copying a band aid.
I have mechanical Aptitude. I can screw up anything.
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Re: 426 hemi valve covers leaking?
[Re: sixpacksteve]
#2657138
05/20/19 08:45 AM
05/20/19 08:45 AM
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Joined: Jan 2003
Posts: 12,010 Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,010
Benton, IL.
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I use the reinforcements around the bolt holes. They needed some slight modifications since they are meant for shivvies, but they helped. I have also had good luck using Superformance gaskets against the head with a cork/rubber gasket glued to them and against the cover. The cork tends to mash out around the thin head rail but the Superformance holds up there better. While the cork follows the contours of my steel valve covers better than the harder gaskets.
Typically Hemiroid, it takes $100 and a lot of work just to gasket the valve covers. And mine are pretty good, but are not bone dry.
Master, again and still
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Re: 426 hemi valve covers leaking?
[Re: sixpacksteve]
#2657181
05/20/19 10:47 AM
05/20/19 10:47 AM
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Joined: Jan 2003
Posts: 15,299 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,299
Omaha Ne
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My car came with 2 cork gaskets on covers. i had to change the head gaskets so i put 2 new cork gaskets back twice and still won't stop leaking! even put a little rtv. any suggestions? 1. Establish what area the leak(s) are coming from 2. Remove and check for the impression of the head seal in the bottom of the gasket. This can go a LONG ways towards identifying the problem / area 3 . Try setting the valve cover on the head without gaskets and "rocking" it Checking for flatness. 4. Check the areas surrounding the bolt holes as they sometimes get stretched ( depressed) from over tightening. If so re level using a small hammer and dolly. Two gaskets are sometimes used because of a sealing problem or to allow additional rocker arm clearance. When doing so I always put sealer between the two. Also might want to check and verify that you are not building too much crankcase pressure
Last edited by TJP; 05/20/19 02:56 PM.
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Re: 426 hemi valve covers leaking?
[Re: Cab_Burge]
#2657296
05/20/19 07:03 PM
05/20/19 07:03 PM
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Joined: Jan 2004
Posts: 1,468 N.Y.
sixpacksteve
OP
pro stock
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OP
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ok, will do! but should i use cork or felpro?
Hell Hath No Fury Like Mine
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Re: 426 hemi valve covers leaking?
[Re: sixpacksteve]
#2657317
05/20/19 08:05 PM
05/20/19 08:05 PM
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Joined: Aug 2003
Posts: 43,116 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,116
Bend,OR USA
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Not rubber or neopreme only, maybe a mix of stiff cork and rubber How many different types of valve cover gaskets does Fel Pro offer now?
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 426 hemi valve covers leaking?
[Re: Cab_Burge]
#2657670
05/21/19 06:22 PM
05/21/19 06:22 PM
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Joined: Jan 2004
Posts: 1,468 N.Y.
sixpacksteve
OP
pro stock
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OP
pro stock
Joined: Jan 2004
Posts: 1,468
N.Y.
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the covers look like an aftermarket chrome, i'm guessing the 2 gaskets were for clearance for stage v rockers. as there were marks on inside of covers! So No rtv Nothing?
Hell Hath No Fury Like Mine
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