Hello all,
Got a set of john eales head studs to go with some new cometic head gaskets....
Cometic say install the gasket dry with no sealant but john has suggested a thin layer of hylomar between the layers?
Anyone else used sealant on a cometic gasket to stop oil seepage across the gasket?
And if so where do you use the sealant.
cheers
scott
cometic head gasket & sealant
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I have only ever used my cometics dry. I have removed and re used these gaskets 14 times on two different Rover V8's with no leakage issues 

Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw
https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw
https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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if the heads/block are machined correctly, no sealant is needed.
If they are not machined correctly...get them machined correctly lol.
Smooth as glass basically.
If you really were busting to use some sealer somewhere, I guess a very small amount of non setting stuff around any oil or waterways.
If they are not machined correctly...get them machined correctly lol.
Smooth as glass basically.
If you really were busting to use some sealer somewhere, I guess a very small amount of non setting stuff around any oil or waterways.
9.85 @ 144.75mph
202mph standing mile
http://www.youtube.com/watch?v=XgWRCDtiTQ0
202mph standing mile
http://www.youtube.com/watch?v=XgWRCDtiTQ0
- Seight-V8
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