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07 avalanche 5.3 Oil pressure drop

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Old December 4th, 2018, 9:33 PM
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Default 07 avalanche 5.3 Oil pressure drop

So recently rebuilt the entire engine
yes i changed the oil pump and sensor and all the bearings,camshaft,crankshaft.
on cold crank it stays at 40-45
when engine worm up on smooth drive like 40mph stays 20-25 and more i fast the higher psi go up highest 40
and when it come i stop at idle like traffic it drop to 0-5
and oil pressure light comes on and says turn engine
off.. i did changed the oil already to clean up inside motor. what else i need to check? Please help i dont want to ruin my new engine
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Old December 5th, 2018, 8:24 AM
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Originally Posted by Kivansh View Post
So recently rebuilt the entire engine
yes i changed the oil pump and sensor and all the bearings,camshaft,crankshaft.
on cold crank it stays at 40-45
when engine worm up on smooth drive like 40mph stays 20-25 and more i fast the higher psi go up highest 40
and when it come i stop at idle like traffic it drop to 0-5
and oil pressure light comes on and says turn engine
off.. i did changed the oil already to clean up inside motor. what else i need to check? Please help i dont want to ruin my new engine
With the correct new bearing clearances, most new or properly rebuilt engines should be well past 40 PSI at 40-55 MPH.usually 50-60PSI. Did you mic the bearngs and cam/crankshaft ? Did you use a good brand of bearings, not the cheap stuff?
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Old December 5th, 2018, 9:41 AM
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All the parts from GM, nothing cheap stuff
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Old December 5th, 2018, 11:13 AM
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Originally Posted by Kivansh View Post
All the parts from GM, nothing cheap stuff
Might want to check out the oil pressure sending unit then and/or having it checked with a mechanical oil pruesure gauge Is the vehicle running okay besides that.?
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