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A4 TDI Knocking noise?!? Sounds painful!

Discussion in 'A4/S4 forum(B5 Chassis)' started by Philios, Aug 31, 2007.

  1. Philios
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    Philios New Member

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    [Aug 31, 2007]
    Hello all,
    Right anyideas on this one?
    Got an A4 TDI (90) Recently changed the oil and filter. (Put Valvoline full synthetic in) Now it seems to make a knocking noise at higher revs (over 2500 rpm) Almost sounds like exhaust manifold gasket has gone and is making a snapping noise but can't see any sign of that? Definitly coming from one cylinder but not sure which. Also a sight judering when accelerating. I have read on here that some oil can cause injector slap? What is this and does it sound like I have it?? I'm really hoping it's not the head gasket thats gone as this will mean RIP car!
    Any help appreciated
    Phil

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  3. Philios
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    Philios New Member

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    [Sep 11, 2007]
    Just changed the EGR valve as it was leaking. Had black power coming out of the side. Also put new air filter in. This has given me some power back but still get a tappet rattle at high revs.
    Got some new oil so going to tyr that next. Anyone have any other ideas?
    Cheers
    Phil
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