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Generation III Internal Engine 1997-2006 LS1 | LS6
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Low Oil Pressure at Idle

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Old Aug 17, 2008 | 02:49 PM
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I don't think its the plate. The gasket looks good. But its flush with the plate.

I am running out of ideas.
Attached Thumbnails Low Oil Pressure at Idle-cam-retainer.jpg   Low Oil Pressure at Idle-cam.jpg  
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Old Aug 17, 2008 | 04:37 PM
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It's not supposed to be flush with the plate. That would create no seal.
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Old Aug 17, 2008 | 04:47 PM
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Originally Posted by 98Camarod
It's not supposed to be flush with the plate. That would create no seal.
I looked closer. Its sticks out just a bit.
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Old Aug 17, 2008 | 04:54 PM
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Did it just start out of no where or it's happened since the new motor was built?
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Old Aug 17, 2008 | 05:06 PM
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Engine has under 50 miles. Pressure was fine when I installed it.

All I remember is one WOT run, then the pressure started dropping.
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Old Aug 17, 2008 | 06:53 PM
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All back together.

Cold 20#. Hot 10# at idle.
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Old Aug 17, 2008 | 07:11 PM
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So you addressed the oil pump, o-ring, cam retainer plate. Did you hook up a mechanical gauge to confirm the oil pressure? If so, sounds like its going to be terrible.
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Old Aug 17, 2008 | 07:14 PM
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Thats the last thing I can do. Mechanical gauge.
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Old Aug 17, 2008 | 08:58 PM
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Originally Posted by Ed Blown Vert
Thats the last thing I can do. Mechanical gauge.


I hate to tell you this but thats the FIRST thing you should have done. If the guage reads zero like you say it has then you would have some serious knocking and tapping going on. You would have heard the rods knocking and the lifters tapping due to no oil but you claim the engine sounds fine. This leads me to believe that you have a problem with the sending unit or a short some place causing incorrect values to be sent to the guage.

GET THAT MECHANICAL GUAGE HOOKED UP ASAP!

Good luck man I hope it turns out well for you!
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Old Aug 18, 2008 | 10:11 AM
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I really thought it was a mechanical problem. But I have a gauge now. Just waiting for the adapters.

I am going to have to remove the blower belt to be able to hear the engine better.

Thanks.
Last edited by Ed Blown Vert; Aug 18, 2008 at 10:35 AM.
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Old Aug 18, 2008 | 10:58 AM
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Originally Posted by Ed Blown Vert
I really thought it was a mechanical problem. But I have a gauge now. Just waiting for the adapters.

I am going to have to remove the blower belt to be able to hear the engine better.

Thanks.


I got my fingers crossed for you bro!
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Old Aug 18, 2008 | 11:22 AM
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Originally Posted by Ed Blown Vert
Thats the last thing I can do. Mechanical gauge.

That is the first thing that should be done when diagnosing a low oil pressure problem. Verify with a mechanical gauge...... It might save you and your engine builder tons of grief
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Old Aug 18, 2008 | 11:59 AM
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When you had the pan off how closely did you look at the oil pickup tube? Are you absolutely sure there's nothing blocking the flow in the tube or the screen on the end?
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Old Aug 18, 2008 | 12:29 PM
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Originally Posted by P Mack
When you had the pan off how closely did you look at the oil pickup tube? Are you absolutely sure there's nothing blocking the flow in the tube or the screen on the end?
I pulled it completely off. The screen was completely clogged. I cleaned it all out and blew air through it.
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Old Aug 22, 2008 | 07:32 PM
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Mechanical gauge verifies the low pressure. Guess it's internal. :rant:
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Old Sep 20, 2009 | 12:53 PM
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To close this out, it ended up being a cam bearing.
According to the new engine builder. It moved 1/4 in.

I am up and running again with a new rebuilt engine.
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Old Sep 20, 2009 | 01:44 PM
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Originally Posted by Ed Blown Vert
To close this out, it ended up being a cam bearing.
According to the new engine builder. It moved 1/4 in.

I am up and running again with a new rebuilt engine.
indeed

Glad to hear you have resolved the issue.
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Old Sep 21, 2009 | 01:59 PM
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Originally Posted by Ed Blown Vert
To close this out, it ended up being a cam bearing.
According to the new engine builder. It moved 1/4 in.

I am up and running again with a new rebuilt engine.
Were they stock bearings or aftermarket? How does a cam bearing end up moving?
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