That's why I used gasket material and thin film of blue Permatex Hylomar on

both sides. Hylomar does not harden like Silicone sealants.
Bulent

guys, on a high pressure item like this with uneven bolt down you
 MUST make that plate at least 1/2" thick and lap both surfaces
flat. If you don't use o-rings, (which I strongly advise) pressure 
will try to lift the plate. Most self forming gasket
materials are not used in pressure applications. Any flex and 
the oil will knife out, a real mess. The o-ring deforms into the
gap and that makes the seal. Al has done a good job of it. 
Another way to do this that sounds complicated but really isn't. Go
to the motorcycle shop and get some 10 or 14mm locating dowels. 
Drill into the block and engine side with the correct size
drill. A perfect fit isn't needed. Then countersink both sides 
to trap a o-ring on the outside of the dowel. Works very well,
o-rings are 1 use only with this set-up so buy a few extra. 
They only cost about $.20 each anyway. Bill Jepson

That's a interesting trick Bill. Can you make a sketch or 3D?

Paul Lamar
 
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