low oil pressure, but plenty of oil... - Team Camaro Tech
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post #1 of 10 (permalink) Old Mar 31st, 04, 09:00 AM Thread Starter
JTM
 
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not sure if its just my guage, but it hangs @ around 20lbs of pressure. and drops slowly as the engine warms up. any ideas?
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post #2 of 10 (permalink) Old Mar 31st, 04, 09:10 AM
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"Drops slowly" to what

If you are relying on the electric gauge I would install a mechanical right on the engine and see if it reads the same or different.
Hard to say what it could be at this stage.

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post #3 of 10 (permalink) Old Mar 31st, 04, 10:35 AM
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I wouldn't sweat it if you are talking about pressure at idle until you start getting down below 10-15 lbs.

The old thumb rule of 10 psi per 1000 RPM is a good reference point. As long as pressure comes back up with the revs you should be fine.

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post #4 of 10 (permalink) Old Mar 31st, 04, 12:19 PM Thread Starter
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it goes up with revs, but i dont think it is even above 10psi @ any time when the engine is warm. also, on my pontiac 350 there is a plug in the head on the right side in tyhe front, it has 2 prongs.. i think its a temp sensor, and my temp guage doesnt work.. am i right in assuming whatit is? and how do i hook it back up?
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post #5 of 10 (permalink) Old Mar 31st, 04, 12:50 PM
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If it's under 10 lbs. at idle, you have issues to deal with.

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post #6 of 10 (permalink) Old Mar 31st, 04, 07:28 PM
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If it goes completely out of pressure, the hyd lifters will start to clatter, that is a sure sign of oil pressure loss.
Put a mechanical gage on it and see what it is. I know on BB chevys, the oil pump pickup can fall out and the oil pressure drops!
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post #7 of 10 (permalink) Old Mar 31st, 04, 07:57 PM
 
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My old Camaro used to run around 10 lbs and go up and down with engine speed. Tore it down and found that the oil pump bolts were not tight and it was leaking back into the pan.
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post #8 of 10 (permalink) Old Apr 1st, 04, 05:07 AM Thread Starter
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even if my valaves or lifters were making noise, i coudltn hear them.. i also have an exhuast leak.. i think its a gasket @ the manifold.. is it possible i have a hole in my head cuasing a leak as well? i put my finger down near the noise and i feel the hot air... it sounds alot like i am missing a spark plug, but i assure you they r all there.. and tight. thanks [img]smile.gif[/img]
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post #9 of 10 (permalink) Old Apr 1st, 04, 05:08 AM Thread Starter
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can any of you suggest a good repair manual? ive always steered clear of haynes and chiltons, in favor of the more detailed manuals, but maybe in this case those r the right books?
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post #10 of 10 (permalink) Old Apr 1st, 04, 05:47 AM
 
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Get a Helms Manual for your car. That is what the technicians use.
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