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View Full Version : Valve cover gasket question


One_Big_Midgett
06-04-2012, 09:32 PM
Hey xj gurus, I need to replace the valve cover gasket on Big Nasty. I was gonna go with the good old cork gasket. And suggestions on a better choice?
bigjim350
06-04-2012, 09:44 PM
A cork one will work fine, but I prefer the rubber gaskets.
XJ Wheeler
06-04-2012, 11:43 PM
A cork one will work fine, but I prefer the rubber gaskets.

X2
Mudderoy
06-04-2012, 11:59 PM
Hey xj gurus, I need to replace the valve cover gasket on Big Nasty. I was gonna go with the good old cork gasket. And suggestions on a better choice?

Matt had me order a rubberized cork gasket from RockAuto for the new engine. Best of both worlds!
LizardRunner
06-07-2012, 12:22 PM
I like the idea of a rubberized cork gasket. Personally I use Ultra Black Oil Resistant Gasket maker by Permatex for a valve cover gasket.
bluedragon436
06-07-2012, 12:24 PM
I was going to say I used the rubber seal when I had to replace mine after I purchased my XJ... It was easy to install, and haven't had any issues since... I had a couple of mechanics tell me not to go straight cork, because it will break down and start leaking alot faster... so I would def. say either go with the straight rubber gasket, or get the hybrid cork/rubber gasket if you can...
Mudderoy
06-07-2012, 02:26 PM
I was going to say I used the rubber seal when I had to replace mine after I purchased my XJ... It was easy to install, and haven't had any issues since... I had a couple of mechanics tell me not to go straight cork, because it will break down and start leaking alot faster... so I would def. say either go with the straight rubber gasket, or get the hybrid cork/rubber gasket if you can...

I think that the cork is thicker and necessary for the older valve covers. The aluminum valve covers I think.
wonka1981
06-13-2012, 08:03 PM
I prefer the rubber as well
xjrev10
06-14-2012, 10:50 AM
Put a rubber gasket under the 97+ steel cover I put on my 88 4.0. Haven't ran it yet. Was a fel-pro I ordered off Rock Auto and was around 35 bucks.
KH96XJ
06-14-2012, 11:12 AM
I prefer the rubber as well

No glove no love.
nateyz2000
06-14-2012, 12:46 PM
Blue Rtv

Nate
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ParadiseXJ
06-16-2012, 01:41 PM
I have cork on the XJ + black oil resistant RTV gasket maker.
Fel-Pro rubber on MJ

XJ has "seeped" since a few months after I installed it. Only a year old and I'm about ready to replace it...with rubber.

MJ has been dry as a bone for 2 years. You decide.
modestmar00xj
06-17-2012, 02:45 PM
this is good information! cause im loosing coolant and theres no leaks or any signs thats its leaking but i have to put in coolant like every 3-4 weeks. so im thinking maybe i have a bad head gasket.
Mudderoy
06-21-2012, 03:41 PM
this is good information! cause im loosing coolant and theres no leaks or any signs thats its leaking but i have to put in coolant like every 3-4 weeks. so im thinking maybe i have a bad head gasket.

When they rebuilt my transmission they found a freeze plug on the back of the block was seeping. I never saw any coolant on the ground.