OUR VIDEOS GALLERY MEMBER SPONSORSHIP VENDOR SPONSORSHIP

User Tag List

Results 1 to 9 of 9

Thread: GQ 4.2 Oil in coolant overflow tank

  1. #1
    Beginner
    Join Date
    Jan 2018
    Posts
    15
    Thanks
    0
    Thanked 1 Time in 1 Post
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    GQ 4.2 Oil in coolant overflow tank

    GQ 4.2 naturally aspirated 1994 manual diesel. 407000 kms. Runs very well with negligible oil usage between changes.
    Oil is appearing in the coolant overflow tank, but the vehicle is not overheating, is not losing coolant, and there are no air bubbles apparent with the radiator cap removed.
    A strange one and I'd welcome any suggestions as to the possible cause(s) and solutions.
    Thanks.

  2. # ADS
    Circuit advertisement
    Join Date
    Always
    Posts
    Many

     

  3. #2
    Legendary 4bye4's Avatar
    Join Date
    Aug 2014
    Location
    Kingsley WA
    Posts
    4,857
    Thanks
    1,077
    Thanked 2,537 Times in 1,299 Posts
    Mentioned
    15 Post(s)
    Tagged
    1 Thread(s)
    G'day mate and welcome to the forum. Head gasket leaking between the water port and oil return port??.
    2005 GU IV ST 3.0. Snorkel. Roof rack. Awning. Spots. Welded I/C. Dual batteries & VSR. UHF. Barn door hinge extension. Roof top spot lights. Rear drawers. 2" lift. NADS. EGT and boost gauges. Trans temp and water temp gauges. Provent 200 catch can. Rear ladder


    And crawling on the planet's face, some insects called the human race. Lost in time. And lost in space... and meaning.

  4. #3
    Expert
    Join Date
    Aug 2012
    Location
    sunshinecoast
    Posts
    309
    Thanks
    0
    Thanked 103 Times in 82 Posts
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    i'd say headgaskt to. if you remove the radiator cap and tape a clear plastic bottle with the bottom cut off on top of the opening and pour water in till it comes slightly out of the radiator then start the motor. allow a bit of time till any trapped air comes out. then see if any bubbles come out. there is also a test kit that i believe you can get, that you can test the radiator coolant with. i think it tests for Co2 but i've not had any experiance with this myself.

  5. #4
    Legendary GQtdauto's Avatar
    Join Date
    Dec 2016
    Location
    Northeast Victoria
    Posts
    3,012
    Thanks
    5,164
    Thanked 1,911 Times in 1,256 Posts
    Mentioned
    41 Post(s)
    Tagged
    0 Thread(s)
    Yep head gasket at best .

  6. #5
    Expert Deano2506's Avatar
    Join Date
    Apr 2017
    Location
    Hobart,tasmania
    Posts
    125
    Thanks
    35
    Thanked 39 Times in 31 Posts
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Just a thought but could it be oil cooler?

  7. The Following 2 Users Say Thank You to Deano2506 For This Useful Post:

    AB (4th January 2018), Rossco (4th January 2018)

  8. #6
    Administrator AB's Avatar
    Join Date
    May 2010
    Location
    Christmas Hills - Yarra Glen - Victoria
    Posts
    28,055
    Thanks
    13,546
    Thanked 20,715 Times in 8,559 Posts
    Mentioned
    579 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by Deano2506 View Post
    Just a thought but could it be oil cooler?
    Definitely possible O'ring perished. Can't believe the oil cooler housing shares the water ports with 2 x O'rings sealing everything apart.

  9. #7
    Beginner
    Join Date
    Jan 2018
    Posts
    15
    Thanks
    0
    Thanked 1 Time in 1 Post
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Many thanks for your replies. My first thoughts, of course, were a head gasket problem and I also wondered about the oil cooler. I've got a Gregorys GQ workshop manual and there is a section on the dismantling and re-assembly of the oil cooler.......looks like access could be pretty difficult. But first, I'll need to make absolutely certain it's not a head gasket problem.
    Thanks again.

  10. #8
    Beginner
    Join Date
    Dec 2018
    Location
    Southland New Zealand
    Posts
    9
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hi, wondering if you ever figured out what the issue was? I too have oil in my coolant😬

  11. #9
    Expert First Pooy's Avatar
    Join Date
    Mar 2018
    Posts
    285
    Thanks
    27
    Thanked 58 Times in 34 Posts
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Oil cooler over head gasket, plus the cooler is an easier and cheaper job then the head gasket and if you have more then just a bit off oil in your expansion tank then that points to oil cooler again.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •