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  1. #1
    Join Date
    Apr 2009
    Location
    Keiraville, NSW
    Posts
    949

    Oil Pump Replacement

    Oil pump is probably on its way out (390k). Check Oil, especially with a cold engine is becoming prevalent. Service agent is not a Holden specialist. Some state engine out, others state leave engine in but crossmember out.

    Advice please as to which way to go. Basically a stock standard WK.
    After market or OEM pump?
    Thank you.

  2. #2
    Join Date
    Nov 2013
    Posts
    600
    Quote Originally Posted by grange250 View Post
    Oil pump is probably on its way out (390k). Check Oil, especially with a cold engine is becoming prevalent. Service agent is not a Holden specialist. Some state engine out, others state leave engine in but crossmember out.

    Advice please as to which way to go. Basically a stock standard WK.
    After market or OEM pump?
    Thank you.
    I would be getting the car tested & diagnosed first by a reputable workshop.
    At 390,000 km's an engine overhaul would be on the cards.

    But, first things first, test oil pressure, hot & at normal operating temp, at idle & at approx 2500rpm
    using a gauge - any decent workshop will be able to do this for you..

    Make sure it's not just a dodgy oil switch...

    Good luck.......
    GTSR HERON WHITE MANUAL build # 0068
    VK HDT Calais Director Build # 2107
    2010 VE SSV SPECIAL EDITION

  3. #3
    Join Date
    Jan 2004
    Location
    Perth, WA
    Posts
    7,064
    As said, check the actual pressure first and at 390k, if you pull it down to change the pump, you may get a few nasty surprises. I would tread carefully when you get them to replace the pump, may work out cheaper to buy a crate motor or even a low km one and swap it out.

    Melling are good aftermarket pumps if you decide to replace it.

  4. #4
    Join Date
    Jan 2011
    Location
    Perth
    Posts
    486
    Low oil pressure generally happens once oil gets hot and thins out...not when cold and oil is thicker

  5. #5
    Join Date
    Nov 2013
    Posts
    600
    Quote Originally Posted by Eors View Post
    Low oil pressure generally happens once oil gets hot and thins out...not when cold and oil is thicker
    When I'm doing a diag I want all the answers - Cold oil pressure test is a must.

    Think blocked oil pick up - when cold, the thicker oil struggles to get through..
    Some pumps you can actually hear it when pickup blocked.

    The OP has complained about "check oil" warning coming on - nothing about oil pressure???

    I've lost count how many oil pressure switches I've fitted over the years on 5.7's..
    GTSR HERON WHITE MANUAL build # 0068
    VK HDT Calais Director Build # 2107
    2010 VE SSV SPECIAL EDITION

  6. #6
    Join Date
    Apr 2009
    Location
    Keiraville, NSW
    Posts
    949
    My apologies - A switch has been replaced. The Grange does not have an oil pressure gauge as standard but the shop was talking about a temporary fit somehow. Since the switch was replaced (at 390 service), the check oil has appeared more frequently until it is running for a while. Certainly could be a sludge blockage. Agent has said that a sludge cleaner can cause more damage to an ageing pump. Oil pump is original. Engine has otherwise checked out well apart from one lifter that is a little noisier than it should be.
    Engine was mentioned but i'm hoping to get away with an outlay of fewer dollars.







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