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My derv has a strange rattle

Discussion in 'A4/S4 forum(B5 Chassis)' started by Gunny110, Sep 10, 2013.

  1. Gunny110
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    Gunny110 Member

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    Hi all, I've noticed that my car is sounding more like a tractor than it should. I lifted the bonnet last night and it seems to be coming from around the turbo/flexipipe. I can't see anything obvious and smurf runs as she should, anyone shed some light on it?
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  2. jbh
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    jbh TDi lover

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    could be the cat has broke up inside. when its turned off and cold see if you can give it a tap with something and see if it rattles
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  3. Gunny110
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    Gunny110 Member

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    Thanks jb, with the engine running just put some light pressure on the flexi and the rattle stopped?
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  4. jbh
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    jbh TDi lover

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    yea sounds like your cat has broke up. perfect excuse to take it off and get the gubbins from inside out

    P.S I haven't forgot about the coilovers ive just not had a minute between kids in laws and 7 seaters
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  5. Gunny110
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    Gunny110 Member

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    No worries jb, will that increase performance?
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  6. jbh
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    jbh TDi lover

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    if you take all the **** out the cat it will give it a bit extra go and improve mpg slightly
    what youre doing is taking away a restriction. and to be honest an older diesel doesn't really need it
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  7. Gunny110
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    Gunny110 Member

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    It's the cat, looks like il be gutting it out then :) any ideas, or do I just mash up the insides until they all fall out?
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  8. Gunny110
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    Gunny110 Member

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    So I decated the car buy guting the cat and still have a ting ting rattle, any ideas?
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  9. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    Does it still stop if you press on the exhaust?
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  10. Gunny110
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    Gunny110 Member

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    No unfortunately not, it sounds like it is coming from the engine
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