Normal oil pressure 6.0 Vortec

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95escahoe

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What is the normal oil pressure range for a 6.0 Vortec? At idle and under acceleration


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DDenali

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95escahoe

95escahoe

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What year are you working with


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Thanks, was just curious it's an 04 Esky 6.0 has 160k and change idles a lil under 40, and going down the road it's 40+ about the same as my 03 Silverado with 116k


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mals

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Idles a lil under 40, and going down the road it's 40+

You might want to do a quick test. Turn the ignition to the run position without starting it and watch the gauges energize. If it oil pressure needle sticks at ~40psi with the engine off (i.e. no pressure) you have a bad oil pressure sending unit. Mine was like that when I bought it with 156k. Cheap part to replace, but it is on the back of the block against the firewall. I watched a few youtube videos and did it all by feel while laying across the top of the engine. Now it reads accurately, and actually changes between idle and driving.
 

Jimmy John

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Not sure what you mean by "sticks at ~40psi" ? What should the gauge do when key is turned on but engine is off?
 
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95escahoe

95escahoe

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Not sure what you mean by "sticks at ~40psi" ? What should the gauge do when key is turned on but engine is off?

If you put the key in the on position the oil pressure should be at 0 because the engine isn't running, if it reads anything other then 0 you have a bad gauge, sending unit, etc. my OBS Tahoe would read 40 with the key in the on position


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mals

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Not sure what you mean by "sticks at ~40psi" ? What should the gauge do when key is turned on but engine is off?
It should drop down to zero. If it is showing any pressure with the engine off the oil pressure sensor is bad. Mine showed 40psi with the engine off, at idle, or under load. Others fail more dramatically and show 80+psi at all times.

Now my new sensor shows zero with the key in run with the engine off, ~30psi at idle, and ~50 under load.
 
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Jimmy John

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It should drop down to zero. If it is showing any pressure with the engine off the oil pressure sensor is bad. Mine showed 40psi with the engine off, at idle, or under load. Others fail and show 80+psi at all times.

Now my new sensor shows zero with the key in run with the engine off, ~30psi at idle, and ~50 under load.

I see what you mean now. I know on some vehicles gauges start out in funny positions before the engine is started.
 

dantheman

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good rule of thumb is 20-40psi at idle (hot/cold) and rising by ~10psi per 1000rpms.

the motor in my GTO was setup a bit loose and it does 38psi cold and drops to around 16-18 at hot idle but by 7000rpm its at 75ish. its been running that way for ~8 years without issues.
 

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