I have a 1997 chevy blazer 4
1997 4.3 rebuilt motor all
clearances good across the board
hot tanked everything new after
heats up oil pressure drops to 20
lbs. New oil pump cam bearings
rod bearings main bearings new
oil pressure sending unit using
Pennzoil start up oil pressure
steady at 50 to 60 LDS after
warms up pressure drops