Re: 656 tappet cover

Posted by Owen Aaland on March 28, 2011 at 13:56:28 from (65.161.86.66):

In Reply to: 656 tappet cover posted by Vapet on March 28, 2011 at 11:38:39:

Since it is a cork style gasket I just use a little grease on both sides. You will most likely have to straighten your cover, especially around the screw holes. A damaged cover will not provide enen pressure on the gasket to get good sealing. Grease helps keep the cork soft enough that it does of better job of sealing the oil. Using grease does mean that there will always be enough residue to collect dust so it is not too popular with people wanting to keep their tractor pristine. Do not over tighten the cover or it will damage the gasket and will split your new gasket. The seals on the screws also get hard and will allow leakage around the screw holes.

You can use RTV sealant either on the gasket or instead of a gasket but if you do the surfaces must be absolutely free of oil or you will have oil leaks. Use just enough RTV to get a good seal. If you have beads squeezing out you have used too much.

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