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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Here are the measurements I made at the time I switched to 1/4" NPT ell for the oil pickup. The oil channel thru the bearing cap measures .285". The hole thru the strainer frame measures .266". But the 1/8" NPT street ell connecting the pump to the frame only has .187" ID! That was enough to sell me on making the change.