1. Hello Guest!

    You will likely have noticed we have migrated to new forum software, please see the following post about the upgrade:
    Forum Software Migration

    Further to this, I have recently changed the style to see if it suits the feel of the forum better and is slightly better on the eyes for people, please feel free to advise me of anything that bothers you, or if this one is better.

OK..... I have a problem

Discussion in 'Z32 Technical' started by Boll!, Sep 12, 2017.

  1. Boll!

    Boll! Member

    Likes Received:
    2
    Trophy Points:
    18
    So, spent a bit of time on the dyno on Sunday, the last run the Zed pushed a bit of coolant out, maybe a couple of hundred mil or so, didnt think too much of it as I knew the over flow has a small hole in it.

    Temp gauge and ECU temp was not reading high and also checked temp with one of those infer red/ laser temp things in various locations in and around the engine bay, and nothing out of the ordinary.

    Left their and drove home, approx 15ks, got home and it seemed to be gurgling a bit, for maybe 30 seconds after turning it off.

    I had planned to do an oil change so checked the oil, didn't seem to have coolant in it, dumped the oil and took the filter off then realised I didn't have a replacement filter, everything was closed so couldn't get one until the following day.

    Anyway, forgot to put the sump plug back in as I walked away in a huff and today when I went back out to the shed, I noticed what remaining oil dropped out onto the shed floor looked milky.

    So, what are we looking at here? Head gasket failure? They are Cometic BTW.

    Do I do a leak down test?

    What's people's thoughts?

    Cheers.
    Col
     
  2. rob260

    rob260 Moderator Staff Member

    Likes Received:
    90
    Trophy Points:
    48
    TK test it
     
  3. Shane001

    Shane001 Active Member

    Likes Received:
    11
    Trophy Points:
    38
    And a leak down test with the rad cap off. If you see bubbles, cry :(
     
  4. QLDZDR

    QLDZDR ID=David

    Likes Received:
    1
    Trophy Points:
    38
    Cracked?
     
  5. Shane001

    Shane001 Active Member

    Likes Received:
    11
    Trophy Points:
    38
    Not necessarily cracked, more likely head gasket failure, regardless engine out and dismantle time :(
     
  6. Boll!

    Boll! Member

    Likes Received:
    2
    Trophy Points:
    18
    OK guys thanks.
    I'm really hoping it's "only" the head gasket and not a cracked head.

    TK test? That's new to me.

    And what components do I need to get to build a leak down tester?

    Cheers
     
  7. rob260

    rob260 Moderator Staff Member

    Likes Received:
    90
    Trophy Points:
    48
    You might not have any problem at all -oil dropping onto the floor could easily have been contaminated after it left the sump.

    A TK test checks for hydrocarbons escaping via your cooling system.

    I have one of these



    Outlay is a little high to use only once but maybe a garage can do it for you?
     
  8. Boll!

    Boll! Member

    Likes Received:
    2
    Trophy Points:
    18
    Great thanks Rob.
    Fingers crossed mate, see how I go.
     
  9. Boll!

    Boll! Member

    Likes Received:
    2
    Trophy Points:
    18
    Has anyone used the Toledo combustion gas leakage test kit from Supercheap? PN 304000?
     
  10. CHILI

    CHILI Indestructable Target

    Likes Received:
    83
    Trophy Points:
    48
    Blown H/Gasket?(x2), Cracked Cylinder Head?(x2),Cracked Engine Block? GOOD LUCK!
     
  11. Shane001

    Shane001 Active Member

    Likes Received:
    11
    Trophy Points:
    38
    Ever helpful Chili lol ;)

    Leak Down Tester, just buy a cheap ebay one. You'll need an air compressor. It'll take you a good day to figure out how to use it properly. I ended up modifying mine to get it to work consistently.

    TK tester. I have one similar to the SC one, tbh they're a pain in the arse to use. Again a fair bit of a learning curve to figure out how to get a reliable result.

    Or ring a mobile mechanic. Make sure you confirm they have both on board. Half the mechanics out there probably don't even know what they are lol.
     
  12. CHILI

    CHILI Indestructable Target

    Likes Received:
    83
    Trophy Points:
    48
    I can "Sugar-coat it", or
    I can "tell it like it is".....
    CHOOSE ONE!!!
     
  13. Boll!

    Boll! Member

    Likes Received:
    2
    Trophy Points:
    18
    I think I'll buy my own TK tester as a start and go from their.
    Always like to have a crack at doing things myself, and that way I have it their if it's ever needed in the future.

    I tend to agree, a lot of mobile mechanics probably wouldn't know what your on about if asked.
     
  14. East Coast Z

    East Coast Z Active Member

    Likes Received:
    10
    Trophy Points:
    38
    If you are concerned about head gasket issues, cracked cylinder heads, damaged pistons/rings then conduct an engine compression test.
    You can buy a decent compression gauge for about $80.00 that will last a lifetime for the DIY car owners.
    If you have short arms & deep pockets, you can get one for about $30.00.
    Leak Down Testers are a more accurate means of obtaining compression results & performing diagnostics, but are a pain to use, as the test on each cylinder must be conducted with the piston at TDC with the intake & exhaust valves closed.
     
  15. Shane001

    Shane001 Active Member

    Likes Received:
    11
    Trophy Points:
    38
    Compression test isn't really going to help you diagnose a leaking head gasket. All it will tell you is one or more cylinders is down a little on compression. A small leak from a head gasket may not even be noticeable.

    Leak down test on the other hand helps you diagnose exactly where leakage occurs. In the case of a head gasket, if you start seeing bubbles coming through the radiator, you know there is a problem with the head gasket or crack at that cylinder.

    TK test will tell you if exhaust gases are mixing with the coolant. This doesn't pickup all possible head gasket leaks.

    I'd be starting with a leak down test myself.

    Also OP mentioned the head gaskets are Cometic, so have been replaced at some point. I'd also be removing the rocker covers and checking the torque settings on the head bolts.
     
  16. Boll!

    Boll! Member

    Likes Received:
    2
    Trophy Points:
    18
    Thanks guys.
    All good advice.
    I think owning a TK test kit and leak down tester will be used again at some stage so might bite the bullet and buy both.
    Do those tests and go from their.
    Thanks again.
    Col
     
  17. Gunwarm

    Gunwarm Kamikazee Special Corps

    Likes Received:
    4
    Trophy Points:
    18
    The best part about this is its in the shed ready to work on.
    Good luck :) As not stuck on road side.
     
  18. ProckyZ89

    ProckyZ89 Senior Member

    Likes Received:
    4
    Trophy Points:
    38
    Have you checked the coolant overflow hose to see if it's not blocked?
    The small 4mm hose from the radiator cap area that runs down to it?

    If they gets blocked guess what happens to coolant ;)?

    As for the oil it sounds like that's external to the engine if it was sitting there all night in the elements
     
  19. Boll!

    Boll! Member

    Likes Received:
    2
    Trophy Points:
    18
    Well we do need to look at the positives....and that's definitely one of them ;)
     
    Gunwarm likes this.
  20. Boll!

    Boll! Member

    Likes Received:
    2
    Trophy Points:
    18
    Hey Procky, yeah mate I did check that overflow hose and it was not blocked...unfortunately.
    I so hope your right about the oil.
     

Share This Page