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Valve cover gasket

F

fastfarmall

Well-known Member
On my super M the valve cover gasket leaks on the manifold side, but perfectly clean on the spark plug side. I can see that the gasket isn't compressed down on the leaky side. Is there webbing under the valve cover that's let go. I cant remember if it's got it right now!
 
The cover should have only one simple (usually cork) gasket. Using a thin coating of #2 permatex on both sides will be a confident solution. Jim
 
Yeah, if somebody put the cover on cockeyed. And I've seen lots of bent and sprung covers over the years. It's easy to get the gasket out of position too. Cork gaskets tend to dry out and shrink. I've soaked lots of them in the bathtub before installation.
 
I put this gasket in my self last year, and Jim is right about one thing, I didn't use any permatex on it, but i think i am going to look for a diff or a new cover, and then soak it in water, and use permatex #2 next time!
 
Those gaskets are very thick and if dry when installed will require tightening them many times after they start taking a set. We had a steam cleaner in the shop and that would really get the attention of that cork. Soaking them in boiling water helps but just does not get them good and soft. When I steamed them (and it only takes a few seconds) they would expand so when you put them on you had to push them under the cover as you started to tighten down on the cover. They will seal a badly warped cover. No sealer. If I could not soften them I would use a high temperature silicone RTV along with the gasket and let it set over night before running the tractor.
 
Use a carpenter's square and a hammer and a piece of heavy angle iron in a vise and you can straighten up your old one, maybe better than the replacement you get.
 
Just had that problem on the 706 fresh off of rebuild. Just lifted the cover, readjusted the gasket and retightened. We use the grease trick when putting them (valve cover and oil pan at least), it soaks in(some)/seals yet allows easy removal for inspection or when needs to be readjusted.
 
Well Cory, that's going to be the quickest and slickest thing to do, because the power sterring to generator is in the way, to pull the cover off. But i can get it up enough to put some grease under and on the cork and tuck it back in and not touch the generator. Thanks all !!
 
The only thing under the valve cover that could keep that side from being able to draw down on the gasket correctly would be if the vent tube was interfering with the cover.
 
yeah I know how that goes, to much other stuff gets in the way. On the 706 the firewall under the tank, and a few other things get in the way to remove the cover.

You can use a popsicle stick to smear the grease on the gasket(been there) Just be careful not to tear that gasket or you'd be forced to pull the cover to replace it.
 
Owen, does that valve cover have some metal webbing on the bottom side, that transmits pressure from the studs to the edges of the cover ?? I wonder if one of them doesn't have a hair line crack that i didn't see, when i last had it off!!
 
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