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Thread: Coolant contamination

  1. #1
    damo65 Guest

    Thumbs down Coolant contamination

    My 2001 V6 Freelander went in for a minor service today at a well-known Landrover dealer.
    However, they found a thick black substance in the coolant tank (looks like very thick old crude oil or tar). He didn't think it was oil because oil normally looks milky.
    Vehicle has only done 63K and I have only had it for 18 months.

    They flushed as much of it out of the system as they could and replaced the coolant tank and said to bring it back after 500klms and see how it looks.
    It runs nice and smooth so you wouldn't suspect a head gasket or cracked head (or would you?)

    After driving it home the coolant tank looks more like a bottle of fresh brown oil rather than coolant.

    Could the previous owner have put some crud in it (like ChemWeld) to fix or hide a leak? and now, after 18 months it is starting to show?

    Could there be some other crack in the block letting oil into the coolant?

    I am seeing big $$$$, even though it is running so well at the moment.

  2. #2
    lokka Guest
    Trade it on a disco or something else before it costs you more than ya missus if ya have one

  3. #3
    damo65 Guest
    If it's a head gasket or cracked head, anyone got a ballpark figure to fix?

  4. #4
    Join Date
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    Unfortunately, the KV6 engine is also prone to dropping liners the same way the 4cyl version does.

    I can't give you any $ figures for a head gasket set replacement but you're looking at around 10-15 hrs labour cost, that's providing nothing nasty is found once the heads are off.

    PM sent.
    Scott

  5. #5
    Join Date
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    Does it have an oil cooler like the TD5? Thats what mine did when it let go. Oil gets into the coolant but not the other way. It formed this thick grey sludge. Took ages to flush out after the cooler was replaced.

  6. #6
    damo65 Guest
    Good point...will check. I think there is a transmission cooler as well...
    The sludge I have is thick and black and the coolant has turned brown.

  7. #7
    damo65 Guest
    My worst fears have been realised.
    Took it to another LR specialist and they suspect head gaskets (and/or dropped liners). However, due to overheating the alloy has softened and they are not willing to go any further as they will not be able to guarantee that the head bolts will get enough tension on the soft block and it will probably fail.
    They recommend an exchange engine (not recon) at around $6,500.

    Is this really true? that if you overheat the engine then you have to bin it completely!

    I don't know how LR can get away with selling such a bad engine! (along with the 1.8)

  8. #8
    Join Date
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    Just because they say it is a head gasket does not make them right either. Check out the oil cooler first.
    If oil is getting into the coolant you should be using oil, are you?
    You say it is running fine, if it was a cracked head it should be running rough.
    Good luck.
    2011 Discovery 4 TDV6
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    Facta Non Verba

  9. #9
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    If the cyl head gasket is broken, or a liner has moved, then one of the exhaust gas detection kits will pick it up in the water. Head gasket is relatively easy for a competent mechanic, and not much more to remill the block. I have recently had major work done on a 4pot Freelander, (which now goes and sounds wicked) and this is what i got and what it cost me.

    (i slipped a timing belt after getting mud in the tensioner bearing.... )

    Here it goes;
    -head removed and stuff disconnected (me)
    -oversize valves (500$)
    -cleaned, milled, ported, polished head (1000$)
    -cam grind (450$)
    -gaskets, hoses, fittings etc (450$)
    -Head refit and stuff reconnected (me)
    -Engine tune and check (400$)
    -oil, cleaner, loctite, etc (200$)

    Talk to a competent engine builder not a LR mechanic and they can do alot for your $$$. If you remove the engine yourself, getting the sleeves checked and milled isnt that bad $$$ wise. Also, if you have a cracked head, wreckers are offering money to get rid of K series engines, so spares are easy.

    Cheers!!

  10. #10
    Join Date
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    You said the engine runs sweet as - therefore if the head gasket had blown and/or a liner slipped it wouldn't be runnning 'sweet'. I cannot comment on whether there is a transmission cooler but there is one in the IRD (transmission case). It is disk shaped and and sits at the gearbox end of the IRD pressed onto the casing. Coolant comes from the cooling system and circulates inside the IRD taking heat from the IRD oil to the cooling system. Check the IRD oil to see if it has coolant in it.

    Garry
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

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