C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Low OIL Pressure

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Old Apr 3, 2012 | 07:09 PM
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Default Low OIL Pressure

OK, so I am having this problem with my car. Oil pressure is good when I start it up then about 25-30 min into my ride oil pressure starts to drop at idle. I was sitting at a stoplight. when i'm on the gas I have no problem but when im not pressure drops. lowest I seen was about 12. not sure if the motor is about to blow but it sounds fine and no weird noises. oh and the oil pump is new. I just bought the oil pressure switch and im going to change that out. hope thats it ` thanks for the input !
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Old Apr 4, 2012 | 02:07 AM
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My 87 was doing the same thing. Pressure went down to 0 at idle. Hooked up a mechanical gage and it read 59 when my dashboard gage read under 10 cold. Replaced the sender and all is well. Looking at the old sender unit I could see where it was leaking where the wire connection goes into the main body.
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Old Apr 4, 2012 | 09:08 AM
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Did the new sender help?
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Old Apr 4, 2012 | 11:59 PM
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Yes replacing the old sender unit solved the low oil pressure reading at the dashboard. The old sender was leaking preventing it from sending the correct reading.
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Old Apr 7, 2012 | 08:57 PM
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thanks for the replys. I have the new sender but havent installed it yet... hope to get it in tomorrow.


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Old Apr 7, 2012 | 09:34 PM
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I'm interested in the out come too. My oil pressure is fine when running but drops to near 0 when stopped at a light. All new oil pump as well as sending unit and motor.

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Old Jun 1, 2012 | 09:16 AM
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Default oil

ok, so my problem was a main bearing.

I pulled the motor and the front main bearing was toast. got a new short block that was built and it is a beast.

thank you for the relpys and I hope this helps

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