Priming the oil pump on a northstar engine
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Northstar Engines and System Technical Discussion Discussion, Priming the oil pump on a northstar engine in Cadillac Engine Technical Discussion; Have u guys ever heard of priming the oilpump by adding twice the ammount of oil in the engine...
  1. #1
    Moezy is offline Cadillac Owners Fanatic
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    Priming the oil pump on a northstar engine

    Have u guys ever heard of priming the oilpump by adding twice the ammount of oil in the engine

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    creeker is offline Cadillac Owners Connoisseur
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    Re: Priming the oil pump on a northstar engine

    Quote Originally Posted by Moezy View Post
    Have u guys ever heard of priming the oilpump by adding twice the ammount of oil in the engine
    I think it sounds crazy,what would happen to all that oil when you started the engine.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Priming the oil pump on a northstar engine

    Yes. The pump is not submerged and if it looses it's prime you have to submerge it. Put 16 qts of oil in it and run it. Rev it a few times then drain half out.

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    creeker is offline Cadillac Owners Connoisseur
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    Re: Priming the oil pump on a northstar engine

    Quote Originally Posted by Ranger View Post
    Yes. The pump is not submerged and if it looses it's prime you have to submerge it. Put 16 qts of oil in it and run it. Rev it a few times then drain half out.
    Wow!, who would of thunk,what are the indications of a dry pump?,what would cause it to lose it's prime?.

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Priming the oil pump on a northstar engine

    The indications are no oil pressure and an oil pressure message telling you to shut down. Debris holding the check valva open would cause it. Not very common.

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    creeker is offline Cadillac Owners Connoisseur
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    Re: Priming the oil pump on a northstar engine

    Quote Originally Posted by Ranger View Post
    The indications are no oil pressure and an oil pressure message telling you to shut down. Debris holding the check valva open would cause it. Not very common.

    One more reason to do regular oil changes.

  8. #7
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    Re: Priming the oil pump on a northstar engine

    Ranger is correct for why...and how.

    I did not lose prime when I did my HG project. I left the oil pump in place - also the lower end. Oil pan and heads and manifolds and chains and tensioners were off. I just left the indicated ignition module connectors disconnected per the FSM and cranked without starting for 20-30 seconds - then reconnected the connectors and it started right up with no oil pressure issues.

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