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  1. dannykap

    dannykap New Member

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    Location:
    London UK
    Hi all

    I'm new here and to Vauxhall. I have recently bought a 55 reg Design spec Zafira CDTI 120.

    I bought the car from a dealer with a Nework Q warranty. The car is great apart from the fact that it seems to have a coolant leak. It has been back at the dealer twice now, where it has been pressure tested and the dealer cannot find a leak. Each time they have topped the coolant back up to the line. However, after driving 100 miles or so, the display shows the check coolant message and the coolant level is a few inches lower. The car is booked in again next week, but I was wondering if anyone here has any suggestions that I could pass on to the dealer when looking at this.

    Thanks in advance for any help.
  2. fronteratech

    fronteratech VXON Resident 4x4 and diesel specialist

    Messages:
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    Location:
    manchester gt manchester
    Drives:
    Frontera
    ask them to check oil cooler
  3. AutoZaf

    AutoZaf Well-Known Member

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    Location:
    Deepest Darkest Dorset
    check your floor carpets for dampness. Could be a leak in the heating matrix.
  4. dannykap

    dannykap New Member

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    Location:
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    Thanks for the responses. Carpets are dry. I turned it on for a few minutes today and noticed some liquid leaking on the floor under the bulkhead, but couldn't see where it was coming from. I can't understand why the dealer has not been able find a leak when carrying out a pressure test. What are the possible causes of an intermittent leak?
  5. dannykap

    dannykap New Member

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    Location:
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    As an update, the car has been with the dealer for 2 days now. They have driven it and pressure tested it for quite some time, and say they cannot replicate the leak. They said their next step will be to check the head gasket, which I think is unlikely given the puddles I have seen under the car a few times. I will update when (if!) this is resolved but in the meantime, any suggestions gratefully received.
  6. Tommy_Gunn

    Tommy_Gunn New Member

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    Location:
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    Are all the plastic lugs for the return pipes okay on the plastic coolant catch tank? I was losing coolant at a fair rate, about 2" on a 100mile journey and found it to be a crack in the plastic lug/tube where the return pipe fixes on the coolant tank. My initial clue was a lot a moisture on the wiring loom fabric cover and engine bay bodywork immediately below the coolant tank. I bodged-up a new insert and glued it back, but now this is leaking, so need to source a new tank. Btw, this was on a GSi, but can't imagine your set-up is too different from this.
  7. nicho2k

    nicho2k New Member

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    Location:
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    Snap!!! My 51 plate GSi does exactly the same thing & I was going to suggest checking that. BTW, Tommy, did you get it repaired, cos mine is still doing it? It's just a small metal tube that the return pipe is clamped onto. Where it enters the tank, the hole is slightly damaged, allowing water to bubble through when hot.
  8. Tommy_Gunn

    Tommy_Gunn New Member

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    Location:
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    Hi Nicho2k,
    Sadly, the alraldite has given-up after 6 weeks, so it's bubbling out again after a run; albeit at a much slower rate than before. I'm going to have to bite the bullet and get a new tank, which is a shame as I thought I had it sorted. Mind you, I'll see how much Vx charge for one first!

    My original fix was to make a new metal insert with one end the same diameter as the original metal insert (4mm I think) and the other end the same diameter as the plastic lug (6-7mm I think). I alraldited it into what was left of a hole on the tank, but unfortunately, it's not been good enough to stop the coolant bubbling back out.
  9. nicho2k

    nicho2k New Member

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    Location:
    Hartlepool
    I was wondering about a quick fix that would do the trick, but unfortunately arildite was my solution too :( (Never mind, knew I'd have to replace the tank )
  10. Tommy_Gunn

    Tommy_Gunn New Member

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    Location:
    Bourne, Lincs
    I've just added some new glue - it's a two part own brand epoxy resin/hardener from Wilkinson's - and have built-up about 3 layers around where the new insert goes into the tank. So far, so good.

    I also spoke to Vx today and a new tank is £17.88 inc VAT - part number 93183307.

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