I agree, 80 would be nice, but I've never seen that, even in the freshly rebuilt 2.1 I had in 2000. I think there is a pressure relief valve that opens around 60 psi, but I don't know for sure. Apparently, the rod big ends go slightly oval as they age, and also increase in radius as they heat up, causing the drop in pressure, at least according to the production rebuilder that did my rebuild in 2000. Stuart -----Original Message----- From: OlRivrRat [mailto:OlRivrRat@comcast.net] Sent: Sunday, November 23, 2014 9:52 PM To: Stuart MacMillan Cc: vanagon@GERRY.VANAGON.COM Subject: Re: Oil pressure ? On 23 Nov , 2014, at 1:38 PM, Stuart MacMillan wrote: > What concerns me is the 60 psi cold, which indicates the pump is pumping just fine. No blockages into the pump. The huge drop after warm up indicates a bearing problem to me, it's very similar to my worn bearings opening up the clearances with heat and the thinning oil. I would think that a "FreshRebuild", which has 20w50 Oil in it ( which just seems Crazy to me ) should be showing MuchHigher O'P's than 60PSI Cold ~ & Theoretically, Clearances ShouldNot open up with Heat they should become Tighter ~
ORR ~ DeanB= |
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