07 chev truck had low oil pressure. pulled motor put new oil pump,rings,bearings on 2007 Chevrolet Silverado 1500

and ground the valves. but still has low oil,could the afm have anything to do with this

by in Williamsburg, IA on July 30, 2013
2 answers 10 comments
ANSWER by on July 30, 2013
Did you check the actual pressure with a manual test gauge, before and after repair attempt?
COMMENT by on July 30, 2013
put new sending unit on before. checked after rebuild low oil pressure ....at bottom and top motor had 280k .
COMMENT by on July 30, 2013
What engine, by the way?
COMMENT by on July 30, 2013
5.3 m block
COMMENT by on July 30, 2013
How much pressure does it have @ idle?
COMMENT by on July 30, 2013
MAYBE 10 .WOULD THE AFM BE BLEADING OFF TO MUCH OIL ???
COMMENT by on July 30, 2013
That is acceptable pressure on idle! I have seen as low as 8 psi out of a well running engine!! Engine making any noise? Pressure increase with throttle? Define AFM?
COMMENT by on July 30, 2013
LIFTERS .NO INCREASE IN PRESSURE... AFM IS WHERE THE ENGINE BLEAds OFF OIL I THINK ITS 1,2,4&7 active fuel managment
COMMENT by on July 30, 2013
Don't make sense unless oil pump relief valve is defective. This system does run at lower pressures, but should increase with rpm. If you figure it out, post results for others.
COMMENT by on December 06, 2013
I had low oil pressure, very low in my 2005 10 psi, checked all the things advised to you, I finally fixed it,I think I read about this problem a couple of years ago. The problem is in the engines oil pickup tube. Chevy changed to a cam lob in the front of the engine to operate the pump, then they ran the pickup tube to the back of the engine pan. I removed the oil pan, pulled the pickup tube, they used an O ring to seal it but if apparently gets hard and loses it sealing ablilities which causes the engine pump to cavitate. So I put a new O ring in along with red sealant. It works great now and I have good oil pressure. My advice is to add the sealant with a new O ring. Don
ANSWER by on July 30, 2013
what about the cam bearings,did you repl them
COMMENT by on July 30, 2013
yes .. block was hot tanked..