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  1. #1
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    fuel leak

    Hi everyone, came across you're site, very handy & informative.

    I came from a machanical background, but this new fault on my mk4 astravan has confused me slightly. After being parked up for a few hours, i can return and find a small puddle of deisel on the floor. Having got it up on the ramps its dripping from the back of the engine and down the sump. But i can't trace where it is actually coming from?? I've checked all the fuel pipes, the filter housing, fuel rail etc, etc, but can not trace what is leaking. I can't get it to leak with the engine either running or not when i am looking at it either which is really annoying.

    Does anyone have any other ideas?

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    Hi "super ted" and welcome to the forum,

    I guess you are going to have to keep trying to observe the leakage - good luck I'm sure you'll find it, something a bit loose or leaky tubing. There was a similar post recently, but never did hear what was found to be leaking.

    I'm assuming that yours must the Y17DT engine if the diesel leak appears to be at the back of the engine (for example if it was a 1999 with the X17DTL it could well be leaky diesel return tubing or end bung), but for the record it would help to state the engine and year.

    Cheers, Paul

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    thanks for the welcome. i'm not exactly sure which engine it is. the van is on a '51' plate, with a 1.7cdti.

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    Hi again,

    OK, yeah, TIS 2000 lists only the Y17DT for year 2001. Injector pump at back of engine. Keep looking and watching while engine running and hopefully you will find the source of the leak. Might have to clean everything up first and have somebody revving the engine for you. Maybe its leaking over by the injection pump...good luck mate,

    Cheers, Paul

    OK deleted last comment as irrelevant....

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    is the filter housing at the rear of the engine as my mk5 cdti 150 was leaking fuel same as yours and it was the drain plug at bottom of filter housing as it has a little rubber seal on the top of it which is renound 4 cracking and leaking



    this is the part i mean unscrew it and replace the o-ring seal

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    ok thanks for the info, i will take a look at it but i am convinced its actually down the back of the engine block itself but im open to any ideas.
    Thanks, i will report back.

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    Is it an injector leaking? have you checked the pipes going to the injectors or there may be a seal gone causeing diesel to leak out.

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    Hi, i have checked the injectors and all piping. After taking another look i am convinced that it is coming from the injector pump on the back of the engine but it such a pain in the arse to see/get to that im not sure 100% but that is the area. Seems to be a silver metal box fixed to it? Need to get a mirror down there i think.

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    Any news on this, as I have the exact same symptoms.

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    Hiya All
    To be frank i had a similar leak on my hgv horsewagon,

    It was the fuel pump spindle thingy,

    Unfortunatly a new pump was about £900 but i had mine reonditioned for £700

    Your problem could be similar, and will only show when the fuel is under pressure, ie will be burning fuel when running, and you stop the engine, but the fuel is still under pressure has no where to go other than its weakest point.

    I do hope you get it sorted, by good wishes to you

    Paula

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