2007 Chevrolet Silverado 1500 Q&A

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

and ground the valves. but still has low oil,could the afm have anything to do with this -
Answer 1
Did you check the actual pressure with a manual test gauge, before and after repair attempt? -
Comment 1
put new sending unit on before. checked after rebuild low oil pressure ....at bottom and top motor had 280k . -
Comment 2
What engine, by the way? -
Comment 3
5.3 m block -
Comment 4
How much pressure does it have @ idle? -
Comment 5
MAYBE 10 .WOULD THE AFM BE BLEADING OFF TO MUCH OIL ??? -
Comment 6
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 7
LIFTERS .NO INCREASE IN PRESSURE... AFM IS WHERE THE ENGINE BLEAds OFF OIL I THINK ITS 1,2,4&7 active fuel managment -
Comment 8
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 9
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 2
what about the cam bearings,did you repl them -
Comment 1
yes .. block was hot tanked.. -