Quote:
Originally Posted by joe_db
My current engine starts out high - 60 PSI - and then quickly falls to 40 as it warms up.
My last engine started out at 20 and slowly built up to 40 over 20 minutes or so.
My only thought is restrictions of some kind or a bad pump = thick oil not being pumped very well. Lack of restrictions equals the usual cold oil is thicker which gives higher pressure.
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Next time you have your oil pan down have a look and a measure of that fitting. On my engine the ID of the ell was significantly smaller than the oil pump discharge channel. I posted the figures here a while back. I'll look for the post.