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Thread: Northstar low oil pressure alarm

  1. #1
    Join Date
    May 2005
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    Northstar low oil pressure alarm

    I Replaced The Northstar In My Wife's Eldorado, (headgasket Problems And Overheating With Cooland Loss), With A Used Low Mile Seemingly Good One. When The Engine Gets To Tempurature Especially On Hot Days I Get The Oil Pressure Alarm At Idle. If I Crank The Idle Just A Little It Goes Away Although It Sometimes Happens When Decelerating. Could It Be A To Low Idle Problem Or A Sensor? More And Neverending Northstar Problems For Me. I Shoulda Got Rid Of It.


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  3. #2
    dkozloski's Avatar
    dkozloski is offline Cadillac Owners 10000+ Posts
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    Re: Northstar low oil pressure alarm

    Aftermarket oil pressure sensors are notoriously erroneous. Try a factory sensor before doing anything else.

  4. #3
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    Re: Northstar low oil pressure alarm

    thanks, it is the factory sensor that is in the engine.

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Northstar low oil pressure alarm

    Might just need to be replaced.

  6. #5
    fristim is offline Cadillac Owners Fanatic
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    Re: Northstar low oil pressure alarm

    Quote Originally Posted by tiptoe
    thanks, it is the factory sensor that is in the engine.

    Totally normal here. Especially when the motor gets hot. The cure would be going to a thicker oil, best oil for the North* is Rotella T which is a heavyduty truck oil, try it and I guarantee it will go away.

  7. #6
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    Re: Northstar low oil pressure alarm

    Thanks, Just so happens that that is exactly what I use in my Kenworth. I'll give er a try.

  8. #7
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    Re: Northstar low oil pressure alarm

    Hey offhand how many quarts does the northstar hold. I have a pretty good and convienient service guy but I know that he does not carry rotella 15-40.
    Thanks

  9. #8
    JimHare's Avatar
    JimHare is offline Cadillac Owners Connoisseur
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    Re: Northstar low oil pressure alarm

    The 4.6L Northstar takes 7.5 quarts with filter change. Overfilling is very bad. WHen I change, I usually fill the new filter, then take the rest of the quart can and 6 more, and use exactly that. Then I check it once a week, and add about 3/4s of a quart every 1000 +/- miles to the Deville, and about 1/2 qt every 2500 to the Eldo. I just try to keep the level just below the top of the hash marks on the dipstick, checked when warm, about 5-10 minutes after shutdown.


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