low oil pressure when idling

[sleeper buick]

ok here we go motor was just redone new rods,cam,crank,pistons, and bored out to .20 over and when the car is setting still my oil pressure drops fron 60 to 20 and trys to turn off when i start it up and put it into gear. any one know what it could be?

 

[bison]

oil pump clearance too much
bearing clearance too much
missing plug(s) in front of engine

 

[GP Black Pearl]

Oil pump clearance was my problem. Went from 70 psi to 20 psi. Gasket was to thick.

 

[sleeper buick]

and it just started ticking when u give it gas

 

[daily driver]

at what rpm and what engine temp do you get the 20 and 60 psi respectively?

 

[sleeper buick]

temp is 200 and it idles at 10

 

[bison]

Maybe pickup gasket is leaking air in?