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RE: [T3] T3] Valve adjustment


On 17 Jul 2001, at 10:04, Erkson, Toby wrote:

> Interesting.  I *always* wipe oil away from the head and cover before
> placing the cork gasket on.  I treat a gasket like a [liquid] sealant
> and thus make sure both sealing surfaces are clean.  Does 'dry' or
> 'wet' sealing a gasket make a difference or should it be done one way
> or another? Curious...

I think some of the early VW literature I have talks about wetting 
the gasket surface with oil. I assumed this would make the cork 
swell up a bit to help it fill inperfections in the head surface. I really 
can't justify it; I've just always done it. It works, but I don't see why 
dry shouldn't work, too.

OTOH, I really think it can be important to tack the gasket to the 
cover in a couple of places (in the middle of the long sides) 
because otherwise I've seen the gaskets bow up there and leak 
badly. VW added a little protrusion the the topside of the covers 
about '70, but they never did anything to the bottoms. This always 
seemed like an oversight to me.  

I also wipe the head surface, but only to make sure there is no dirt 
there, not to try to get it dry.

-
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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