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

Low Oil Pressure

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Old Jun 19, 2004 | 09:15 AM
  #1  
GM_96LT4's Avatar
GM_96LT4
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From: Sierra Madre
Default Low Oil Pressure

Hey guys,

I did a search on the topic and found a couple of threads but really no solution.

My car is running great, but the oil pressure seems to be awfully low. At idle it's around 5psi, while driving it only gets around 20 psi. Before the install, it would get past 40 psi.

Is this common with a Superchargers (Vortech) or should I be worried?

Any suggestions would be great.

Thanks in advance,

Glenn
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Old Jun 19, 2004 | 11:42 AM
  #2  
TONYDEE64's Avatar
TONYDEE64
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From: Speedo Indiana
Default Re: Low Oil Pressure (GM_96LT4)

Before you pull the motor or the pan, try a different oil pressure sensor...it may not be your problem.. but it's a cheap try.. If that doesn't work I would try an analog oil pressure gauge to make sure your factory gauge is not faulty.
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Old Jun 22, 2004 | 04:07 PM
  #3  
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vvv90
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From: Honolulu, HI
Default Re: Low Oil Pressure (TONYDEE64)

I started a thread similar to this topic:
http://forums.corvetteforum.com/zerothread?id=390276

5 psi sounds awefully low. I would rule out a sensor first before anything like Tony said.

Also, change your oil and filter to BOTH Mobil 1.
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Old Jun 22, 2004 | 09:44 PM
  #4  
marks350's Avatar
marks350
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From: South Park PA
Default Re: Low Oil Pressure (GM_96LT4)

The first thing to do is to use a direct pressure gauge (no sending unit) buy a cheap one anywhere k mart, pep boys.....$10 -15. On my 86 the pressure in the manual says 45-55 lbs at 2000rpm. My pressure read real low so I changed the sender with a cheap one and still read low pressure 10 - 19 lbs. then I checked it with a the direct pressure type. The pressure was 40+lbs so I went to the dealer and bought a GM sender and now my pressure reads between 30 - 55 all the time. All senders are not created =.
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Old Jun 24, 2004 | 08:08 PM
  #5  
GM_96LT4's Avatar
GM_96LT4
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From: Sierra Madre
Default Re: Low Oil Pressure (vvv90)

Thanks Everyone,

I have kept a close eye on it and it does appear to keep about 10 psi per 1000 rpms. However, I am going to change the oil and filter this weekend and see if there is a difference. If not, I will continue with the other steps.

Thanks again,

Glenn
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