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Low oil pressure

This is a discussion on Low oil pressure within the Internal Engine forums, part of the LSx Technical Help Section category; Ok I recently picked up a 98camaro z28 ls1 has the ms3 set up why very low oil pressure help. ...

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    Low oil pressure

    Ok I recently picked up a 98camaro z28 ls1 has the ms3 set up why very low oil pressure help. Also when I let of gas oil pressure goes up?

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    Oil pressure is supposed to increase when RPM's increase. What oil pressure are you seeing? Have you checked the oil dip stick to see the car has the correct oil level in it?

    Do you hear any knocks coming from the engine?

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    Welcome to the site!

    Have you changed the oil and filter since purchasing the car? You may have a sender or gauge issue as that is quite odd for the pressure to rise when you decelerate.

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    Quote Originally Posted by pajeff02 View Post
    Welcome to the site!

    Have you changed the oil and filter since purchasing the car? You may have a sender or gauge issue as that is quite odd for the pressure to rise when you decelerate.
    Yes it had a kn oil filter I installed basic filter and a manual gauge n not sure exactly how much oil to fill. I've read they say5.5 or 6 quarts?. So I have car up and oil pan of it has a new oil pump but pick up tube looks old what should I check for .my friend was saying sumthing about reverse oil flow and maybe the oring on the oil pick up tube
    Last edited by Higbee98; 11-18-2012 at 04:26 PM.

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    No the car sounds good it has 63k . Why if there was a knock check what

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    There is a rev limit set to 4g .

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    Rev limiter on a stock LS1 should be around 6,250 RPM.

    Your car should take 5.5 quarts. However, it's always best to also check the oil level on the dipstick as well.

    Low oil pressure can result from a few things: low oil, spun bearing (usually can hear this), bad gauges, broken oil pressure sending unit (OPSU).

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    The O-ring on the pick up tube is a common culprit -- especially if upgrade or replacement work was performed without fully dropping the oil pan. Could also be debris in the pickup screen -- not likely, but it is a possibility. Where did you plumb the manual gauge in at? Did the stock gauge and aftermarket gauge read about the same?

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    Also, what exactly is the oil pressure?

    Some people think 15-20 at hot idle is too low, when it can be perfectly normal. The pressure at 2k and above is what really matters.

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    ^^ Agree. The old rule of thumb is 10 psi for every 1,000 rpm.

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    Quote Originally Posted by Too Fast View Post
    Also, what exactly is the oil pressure?

    Some people think 15-20 at hot idle is too low, when it can be perfectly normal. The pressure at 2k and above is what really matters.
    I asked this as well for the same reasons. Definitely agree.
    It's on jackstands.

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    [QUOTE=pajeff02;2815835]The O-ring on the pick up tube is a common culprit -- especially if upgrade or replacement work was performed without fully dropping the oil pan. Could also be debris in the pickup screen -- not likely, but it is a possibility. Where did you plumb the manual gauge in at? Did the stock gauge and aftermarket gauge read about the same?[/

    Where should the oil pressure be plumbed at and yes stock dash gauge I was told read the same . It's crazy you start it up oil pressure is low but ok like 25psi

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    I've read a lot in other asked questions and answer .you guys are awesome serious thanks

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    The stock sender is behind the intake, on top of the engine block. Hard to get to and easy to break if you fiddle around back there. Unless your car has been modified for installation of an aftermarket engine oil cooler, there is no other place to plumb an oil pressure gauge sender.

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    So the 25 psi is the pressure under hot idle conditions?

    If so, that's fine.

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