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Thread: Strange knocking - water pump ?

  1. #1
    Regular Member simac's Avatar
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    Unhappy Strange knocking - water pump ?

    Hi folks, not been on for a while due to some probs and having my hands full but that's another story lol

    I got back from a day trip to scotland on monday and noticed a strange knocking from the engine, so looking for any hints lol

    It is coming from the pully end of the engine, it's a kind of whirring/rubbing/knocking sound all rolled into one it's running fine besides this. I'm wondering if it's the water pump or maybe a tensioner/roller for the cam belt

    Mileage is 73k, belt was changed at dealer at 40k but water pump is original. It still uses oil like a fish but i have been keeping it topped up.

    Could there be anyother culprits for the noise ?

    I'm off to catch up with the posts on here !

  2. #2
    Vectra-C Obsessed Poster Drinky's Avatar
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    As per PM Si if you can come to Winwick Sunday i will have a listen for you

    But it does sound like the water pump and it is due another belt set soon anyway !!!!

    Back in a V6 !!!!!!!!!!!! And lovin it !!!

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    It could be the bearings on the alternator.

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    Regular Member Gsi3.2's Avatar
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    I'd take Chris up on his offer Si..

  5. #5
    Regular Member simac's Avatar
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    Think i'll do that !

    I'll tip toe my poorly Vectra to the meet tomorrow means i've had to spend all morning cleaning it though

    m0cea, from what I can tell the alternator sounds quiet it sounds like the noise is coming from down towards the bottom end somewhere so hoping its the water pump

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    Hi, i've been having the same problem with my vectra and thought it was the water pump aswell, got about the same mileage but looked in to it more and i've found out it's the ac pump the noise is coming from.
    hope this info might help

    Jason

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