View single post by Mark Rosenbaum
 Posted: 02-05-2007 03:16 am
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Mark Rosenbaum



Joined: 03-12-2005
Location: Kingman, Arizona USA
Posts: 532
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 AFAIK, while there's an o-ring in the closing cap, there is no gasket involved in the oil pressure relief valve itself.

If the gasket you're talking about looks like the one in the attached photo, that's the special plastic gasket that sits between the aux. housing and oil pump body.  These were made in several thicknesses so that one can set the total clearance between the oil pump rotors and the castings to the specification, which is 0.000,5" to 0.001,5".  That's a critical dimension.  Too small, the pump rotors won't turn and you may snap a timing belt upon initial turnover.  Too large, and the oil pump will not self-prime and may even quit without prior notice during engine operation.

Attachment: oil pump gasket A907E0474Z enlarged.jpg (Downloaded 260 times)