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Loud engine...?

Discussion in 'A4/S4 forum(B5 Chassis)' started by Looney540, Jan 14, 2013.

  1. Looney540
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    Looney540 Member

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    [Jan 14, 2013]
    I have a 2.5 V6 TDi and the engine is very loud, almost sounds just like a tractor. I know that's very vague but I didn't know if it's a common problem.

    Its not a tap tap or a knock just a loud engine!!
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  3. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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  4. spartacus 68
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    spartacus 68 Active Member

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    [Jan 14, 2013]
    The V6 is the sweetest noise you'll ever hear. Yes it can be a bit tractor-like at start up, but hey you can't have everything. Do you still have the engine under-tray in place? There is sound insulation foam padding on it, and there's the plastic V6 engine cover, again with foam insulation.
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  5. gen.heinz guderian
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    gen.heinz guderian Well-Known Member Regional Rep VCDS Map User

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    [Jan 14, 2013]
    Manifolds cracked?
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  6. wesmaster
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    wesmaster Member

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    [Jan 14, 2013]
    Mine is a little noisy on tickover, but as stated before, check all covers in place.
    When driving the engine is VERY quiet, only noticable when pushed hard. And I have removed the pre cat and main cat.
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  7. Looney540
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    Looney540 Member

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    [Jan 15, 2013]
    It's only on 130,000 miles with lots of history and the engine cover and under bonnet foam are both present - although the engine cover isn't screwed down. Would that make the difference.

    It doesn't sound like a cracked manifold, like I said its more of a diesel tractor loudness. It's having it's cambelt done at the moment and I'll try and get a video on its return.
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  8. PAULF
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    PAULF Active Member

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    [Jan 15, 2013]
    Mrs PaulFs' Avant has this issue, and I've still not cured it!
    My saloon only has that 'crack' when cold for a couple of minutes.

    Other causes I have found so far are the Turbo Actuator rod length/stop screw adjustment (I'm nearly done adjusting the Avants' and will do a 'how to' when I'm done), Coolant Temp Sensor causing it to be too far advanced in 'cold mode', the return line system - copper washers and/or pipes at the injector bleed offs, pump timing - if it's too far advanced, you can get a 'bark' and pump advance solenoid.
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  9. Looney540
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    Looney540 Member

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    [Jan 15, 2013]
    Keep me updated Mr. F! :)
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