so i put my new engine in last night and everything went good. got back from a road test and it was just idling on my driveway and i noticed the low oil pressure warning. it goes away when driving but still seems a little low. haven't put a manual gauge on yet but i did put a known good sender in and same thing. this engine has been completely overhauled and the only thing i can think of is the pump is below spec at an idle. anyone run into this before?

 

I'm guessing that the oil pump o-ring is pinched or incorrect, there are two oil pump o-rings available, and it seems that the blue/green one doesn't seal properly, but the red one does. If you search for oil pump o-ring, you should find part numbers. This would be my first guess...

 

+1 for the o-ring issue. Seems to happen to alot of guys.

 

thats kinda what i was thinkin. the machine shop took it apart and i put it together so i wasnt sure if there was a gasket or not. thanks for the input guys!!!

 

do you mean the one on the pickup tube?

 

Yes, that's the one.

 

changed it out last night. problem solved. the only thing i re-used on the engine. lesson learned i guess. thanks again for the help guys!