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  1. #1
    RobMorris's Avatar
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    Rough start bottom end

    Guys

    Can anyone confirm what this noise is on start up?
    It does settle down but you can here it when fully warm on drive and rev.

    Rough start audi A4 2.5 tdi B6 from bottom end? - YouTube

    Cheers

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  3. #2
    AlexGSi2000's Avatar
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    I don't know what the bottom ends sound like when they go on these, but I would say it was worthwhile checking all the belt tensioners & pulleys - there are quite a few, I would expect them to make a similar sound.

  4. #3
    RobMorris's Avatar
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    Thanks mate - so whilst off/cold just have a wiggle of things to see if anything is loose?
    Or get a ear round them whilst running?

    Is there some kind of Screwdriver trick? As in prod parts and listen? This sounds nuts but sure ive seen Edd China do it on Wheeler Dealers?!?

  5. #4
    RobMorris's Avatar
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    Also would it still fly if it was the bottom end?
    Or be all sluggish etc?

  6. #5
    RobMorris's Avatar
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    Just been out on my lunch break - no room for me to get a hand down for a wiggle?
    I guess I will need to get it on the ramp to get from underneath?

  7. #6
    RobMorris's Avatar
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    any other advice?
    Ive done about 300 miles with no changes?

  8. #7
    tbs
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    Im not an expert on the 2.5 tdi in trhe Audi but on the 2.5tdi T4 a similar sound would occur when the vibration damper pulley was disintegrating. ie rubber inner starts to break up and if it goes it takes the cambelt and everything with it. Which is my way of saying get it checked whilst its not costing you anything. As the pulley wears the alignment also shifts and the belts start to rub or catch. I could also be talking rubbish but that was common on 2.5 tdi after about 120k.

  9. #8
    RobMorris's Avatar
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    hmmm doesnt sound good!?

 

 

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