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Vortec Max 6.0 Oil Pressure?


07VMax
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Question

on my 07 nnbs Vortec Max when the engine is at normal operating temp and at idle the oil pressure Gauge is just above 20 and cruising at 60mph it is just under 40. is this normal for a 33k mile truck?? every one of my other silverados have had just over 40 at idle and around 50 cruising

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46 minutes ago, Jeffery Porter said:

Same issue on my 04 5.3. I was told rod bearing won't help the low pressure @ 500 rpm. I'm thinking rod and main bearings, I don't have any more ideas.

What about your pickup tube o-ring?  They usually fail around 160K miles.  Quick way to check is to overfill motor with an additional 2-3 quarts of oil to submerge o-ring.  If pressure rises, you have identified culprit.

 

The OP in this nine year old post, that's normal for an aluminum engine.

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On 12/31/2019 at 10:54 AM, Jeffery Porter said:

New o ring, new oil pump, new sender unit. No noise, just low pressure at idle.

Driving I have 20/30 1500 to 1800 rpm.

Well, you are above minimums, you can check the pump spring, maybe run a slightly thicker oil or just drive it until you schedule an engine overhaul/replacement.

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