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Thread: oil pressure

  1. #1
    Hybrid booster
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    Question oil pressure

    I have low oil pressure & makes a noise on initial start up , engine is a 2.5 turbo engine is fresh only 1,000 miles on it. any ideas what might be wrong? any help would be great! thx

  2. #2
    Supporting Member Turbo Mopar Contributor turbo84voyager's Avatar
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    Re: oil pressure

    When the engine was built, were the mains and rods plastigauged? Was the oil pump replaced? Does it sound like the lifters or from the bottom end. Worn ( too much clearance) bearings will cause this and will sometimes quiet up after it builds some oil pressure. Oil pump problems will cause low oil pressure and will cause the lifters to make noise if there is not enough oil getting to the top end and eventuially wear the bearing if there is not enough pressure. A badly worn turbo can also cause low oil pressure which would also cause top end noise at startup.

    Also connect a mechanical oil pressure gauge to verify pressure. The factory gauges are not always accurate. You obviously have a problem since you have noise but verify how low the pressure is.
    Justin
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  3. #3
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    Re: oil pressure

    Quote Originally Posted by turbo84voyager View Post
    When the engine was built, were the mains and rods plastigauged? Was the oil pump replaced? Does it sound like the lifters or from the bottom end. Worn ( too much clearance) bearings will cause this and will sometimes quiet up after it builds some oil pressure. Oil pump problems will cause low oil pressure and will cause the lifters to make noise if there is not enough oil getting to the top end and eventuially wear the bearing if there is not enough pressure. A badly worn turbo can also cause low oil pressure which would also cause top end noise at startup.

    Also connect a mechanical oil pressure gauge to verify pressure. The factory gauges are not always accurate. You obviously have a problem since you have noise but verify how low the pressure is.
    mains & rods were plastigauged, new oil pump , seems that the sound is coming from the bottom end, noise is only on initial start up not at idle but when bringing rpms up the noise surfaces, oil pressure will not come up, turbo is also new.

  4. #4
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    Re: oil pressure

    I have noticed that when the engine is cold I have good oil pressure but once the engine warms up I lose oil pressure.

  5. #5
    turbo addict
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    Re: oil pressure

    With the engine making noise, you're buying time no matter what you do.

    Prepare to have a second car ready when this one is down.

  6. #6
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    Re: oil pressure

    is there a quick fix to this?

  7. #7
    turbo addict Chris W's Avatar
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    Re: oil pressure

    Quote Originally Posted by turbo-tease View Post
    is there a quick fix to this?
    Is it a common block engine and did you remove the balance shaft? If so, the oil feed to the balance shaft must be plugged to avoid loss of overall oil pressure. Oil pan needs to be removed in order to repair.

    Chris-TU
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  8. #8
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    Re: oil pressure

    Quote Originally Posted by Chris W View Post
    Is it a common block engine and did you remove the balance shaft? If so, the oil feed to the balance shaft must be plugged to avoid loss of overall oil pressure. Oil pan needs to be removed in order to repair.

    Chris-TU
    yes this is a common block it is a 2.5 turbo & still has the balance shafts

  9. #9
    turbo addict Chris W's Avatar
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    Re: oil pressure

    Quote Originally Posted by turbo-tease View Post
    yes this is a common block it is a 2.5 turbo & still has the balance shafts

    If the BS are still in place then that's not the issue.

    Was the oil restrictor to the head removed and not replaced in the block? Oil sending block screwed too far in?

    Chris-TU
    Chris Wright www.TurbosUnleashed.com Chris@TurbosUnleashed.com 602-76-BOOST Tech/Sales#: Monday-Saturday 9AM-7PM MST Proudly Serving the Turbo-Mopar Community since 1997 TU is a performance, not marketing company. We provide accurate performance data on all our performance products. Fabricating data to make us appear better is just not our style. Do the research before you buy. ROCK BOTTOM PRICES WITHOUT THE HIDDEN HANDLING FEES.... -----HOME OF THE 9 SECOND FWD T-M CLUTCH-----

  10. #10
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    Re: oil pressure

    Quote Originally Posted by Chris W View Post
    If the BS are still in place then that's not the issue.

    Was the oil restrictor to the head removed and not replaced in the block? Oil sending block screwed too far in?

    Chris-TU
    nope , all that is good too, I had about 1,000 trouble free miles before this started happening.

  11. #11
    turbo addict Chris W's Avatar
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    Re: oil pressure

    Quote Originally Posted by turbo-tease View Post
    nope , all that is good too, I had about 1,000 trouble free miles before this started happening.
    Have you changed your oil filter yet? You might try removing the check valve that the filter screws onto and make sure it is working properly.

    Chris-TU
    Chris Wright www.TurbosUnleashed.com Chris@TurbosUnleashed.com 602-76-BOOST Tech/Sales#: Monday-Saturday 9AM-7PM MST Proudly Serving the Turbo-Mopar Community since 1997 TU is a performance, not marketing company. We provide accurate performance data on all our performance products. Fabricating data to make us appear better is just not our style. Do the research before you buy. ROCK BOTTOM PRICES WITHOUT THE HIDDEN HANDLING FEES.... -----HOME OF THE 9 SECOND FWD T-M CLUTCH-----

  12. #12
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    Re: oil pressure

    I have removed the oil filter & took filter apart , found some silver dust in oil.

  13. #13
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    Re: oil pressure

    anybody?

  14. #14
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    Re: oil pressure

    time to pull the pan and get a look see at the bearings I'd say...could also check the oil pump at the same time..maybe the relief spring is stuck somehow.

  15. #15
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    Re: oil pressure

    ok , I will try that!

  16. #16
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    Re: oil pressure

    I like Chris's suggestion about the oil filter check ball - it's integral to the thread/hex fitting installed in the block that the filter spins onto. Are you using the correct filter or a different/larger one? Noise at startup could be oil filling the filter and not pressurizing the mains.....

  17. #17

    Re: oil pressure

    ^^Yes, if the oil drains out of filter it'll hammer like mad for few seconds.....sounds like main bearings, pull the hep wires and crank it over until it gets oil pressure, then reattach, will help those dry startups/noise. But silver sheen indicates damage done.

  18. #18
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    Re: oil pressure

    Quote Originally Posted by gears351 View Post
    I like Chris's suggestion about the oil filter check ball - it's integral to the thread/hex fitting installed in the block that the filter spins onto. Are you using the correct filter or a different/larger one? Noise at startup could be oil filling the filter and not pressurizing the mains.....
    its the correct filter,why would it not be pressurizing the mains?

  19. #19
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    Re: oil pressure

    still having these problems , replaced rod bearings n replaced oil pump checked main bearings looked ok.not so much noise at start up now has good oil pressure on start up but once again loses pressure when reaching operating temperature n noise returns. ugh!

  20. #20
    turbo addict Chris W's Avatar
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    Re: oil pressure

    Quote Originally Posted by turbo-tease View Post
    still having these problems , replaced rod bearings n replaced oil pump checked main bearings looked ok.not so much noise at start up now has good oil pressure on start up but once again loses pressure when reaching operating temperature n noise returns. ugh!
    When you installed new oil pump did you confirm there was an o-ring on the oil pump pick up tube?

    Chris-TU
    Chris Wright www.TurbosUnleashed.com Chris@TurbosUnleashed.com 602-76-BOOST Tech/Sales#: Monday-Saturday 9AM-7PM MST Proudly Serving the Turbo-Mopar Community since 1997 TU is a performance, not marketing company. We provide accurate performance data on all our performance products. Fabricating data to make us appear better is just not our style. Do the research before you buy. ROCK BOTTOM PRICES WITHOUT THE HIDDEN HANDLING FEES.... -----HOME OF THE 9 SECOND FWD T-M CLUTCH-----

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