2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque

Oil Pressure Too Low?

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Old 07-01-2009, 12:48 AM
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Oil Pressure Too Low?

I am concerned about my oil pressure gauge reading 5 psi idle after the engine is at normal operating temps. It seems fine at other times.
Old 07-01-2009, 10:36 AM
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Where is your sending unit located?
On the cylinder head? Cylinder head pressure is half (or lower) than block pressure.
Where did you get your power lead from? If it is not full 12 volts your reading will change.

Only factory spec is to have 50 PSI minimum @1000 RPM Block oil pressure.
Old 07-01-2009, 07:54 PM
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Originally Posted by Red07SSNA
Where is your sending unit located?
On the cylinder head? Cylinder head pressure is half (or lower) than block pressure.
Where did you get your power lead from? If it is not full 12 volts your reading will change.

Only factory spec is to have 50 PSI minimum @1000 RPM Block oil pressure.
I had it installed with my turbo kit so I dont know for sure where the sending unit is. I will have to figure this out.
Old 07-01-2009, 07:56 PM
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after a long idle in my sedan i could see 5psi and it never did anything.
Old 12-22-2009, 05:57 PM
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Originally Posted by Red07SSNA
Where is your sending unit located?
On the cylinder head? Cylinder head pressure is half (or lower) than block pressure.
Where did you get your power lead from? If it is not full 12 volts your reading will change.

Only factory spec is to have 50 PSI minimum @1000 RPM Block oil pressure.
i bought a oil pressure gauge but it only reads to 100psi, after i read the spec i thought maybe it'll go over 100psi? will it at anytime go over 100 psi? like at acceleration going way up in the rpms? wondering if i should get a higher reading gauge...
Old 12-24-2009, 11:22 AM
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When i first start up the balt cold, my oil is at 75. I assume if you go wot when it's cold you could reach 100... but my oil pressure is usuallly under 25 at normal operating temp... i dunno bout 5psi though maybe at least 15psi for me
Old 12-24-2009, 12:06 PM
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10lbs / 1K RPM is ideal presssure. So if you are ideling at 650 RPM 6.5lbs is enough. Oil pressure should never exceed 80psi. If it does you are likely to have other failures such as oil filter, bypass valve and pump gear failure.

Not enough is not good, but too much is worse.

-Don
Old 01-28-2010, 06:58 PM
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Originally Posted by utibalt
i bought a oil pressure gauge but it only reads to 100psi, after i read the spec i thought maybe it'll go over 100psi? will it at anytime go over 100 psi? like at acceleration going way up in the rpms? wondering if i should get a higher reading gauge...
Little late...if you are using an electric gauge and you see oil pressure of 100PSI most likely your problem is electrical -- not a good gound may be the culprit. I found that the ground wire for the gauge needs to on the cylinder head if you put the sending unit in the cylinder head or on the engine if you use the original sending unit position.

Originally Posted by dtabbs
10lbs / 1K RPM is ideal presssure. So if you are ideling at 650 RPM 6.5lbs is enough. Oil pressure should never exceed 80psi. If it does you are likely to have other failures such as oil filter, bypass valve and pump gear failure.

Not enough is not good, but too much is worse.

-Don
Factory oil pressure requirement for the 2.0/2.2/2.4 is 50 PSI minimum @ 1000RPM. Block oil pressure! Cylinder head oil presure is less than 1/2 of block pressure.

Last edited by Red07SSNA; 01-28-2010 at 06:58 PM. Reason: Automerged Doublepost
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