Engine Specs Below.
My oil pressure has been marginal when the engine is operated at idle in hot weather. About 7-10 psi, sometimes a red light, according to an electric VDO gauge. No red light with the stock pressure sensor. 28 psi at highway speed. Other than that, even with so many miles all is well. No smoke, easy starts, low oil consumption, etc. No real issues.
I decided to take a look at the bottom end and the condition of the oil sump. I can't get any sort of rattle or looseness from the rod ends. I held them and jiggled the crank by hand. Still no looseness detected. All seems well. Is there anything else I should check since I have it opened??
The question:
I pulled the original pump. The 90 mm bolts seemed a little loose to me?
Otherwise it's ok. I don't really want to pull it apart.....
Well, IFIRST have a new German(Kolbenschmidt) oil pump sitting here. Should I put the original back in or should I use the new pump??
I'm curious if the more experienced among us would have an opinion on this.
PS:
Just compared the pumps......the only difference I see is the shape of the outlet port. I assume that it is the opening on the top of the pump, as installed. The original is more or less a round opening. The "new" pump port is definitely not round, but more of an hourglass shape; one end a little bigger than the other. Any comments on that?
I've just added the photos................to me it looks like a flaw in the casting. I see not reason for it to look like that?
?
THIS IS THE OLD PUMP, ROUND OUTLET; KIND OF A ROUNDED TEARDROP:
THIS IS THE NEW PUMP, HOURGLASS OUTLET:
