2008 Hummer H2 loss of oil pressure after warmed up
#1
2008 Hummer H2 loss of oil pressure after warmed up
70K miles 6.2L, has 40 psi oil pressure at cold startup. Within 3 miles it slowly drops to about 10 psi. At idle it will go to 5 and then 0. Light says turn off. If i rev it at idle I can get 10 -20 psi when warm. I changed the oil and oil filter after I flushed the motor. Oil was clean. I hear nothing wrong, no noises in the engine. No rattles or any valve or piston slap noises.
The oil sender is good I would assume since it shows up and down values of oil pressure. I think I have an internal oil leak like a oil pump pressure relief valve or spun bearings? How can I test which one it is without taking the motor apart? A mechanical cause also reads the same and will read 0 psi.
I won't know until I replace the oil pump if its a stuck relief valve. Need some advice.
The oil sender is good I would assume since it shows up and down values of oil pressure. I think I have an internal oil leak like a oil pump pressure relief valve or spun bearings? How can I test which one it is without taking the motor apart? A mechanical cause also reads the same and will read 0 psi.
I won't know until I replace the oil pump if its a stuck relief valve. Need some advice.
#2
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