406 V6 clunk or knock mystery

Discussion in 'Peugeot 406' started by anvil, Nov 16, 2005.

  1. anvil

    anvil Guest

    When I start to accelerate, either from a standstill or after
    deceleration, there is a quiet, but obvious soft single 'clunk' or
    knock from the suspension or possibly drive gear. It can repeat as the
    gear box changes down during lower speed braking. It doesn't appear to
    be an engine noise. It never varies in loudness or number of 'clunks',
    always one, and always at initial acceleration (whether gentle or
    otherwise) as well as when I take my foot off the gas. I am wondering
    if it could be a suspension/engine mount or a drive gear issue. The
    performance of the car is not affected. It's not loud enough for
    passengers to say 'what's that?'
    Anyone experienced this? Any ideas?
    anvil, Nov 16, 2005
  2. anvil

    Tom Hawley Guest

    This is possibly way off but when the Cat on mine split at the front end
    a few weeks back, what you describe is exactly how I would describe my
    experience. It was jarring one way or the other with the sudden change
    in engine speed. It eventually fell right off. I bunny-hopped around a
    car park to have a friend diagnose the problem as the clunk was the only
    thing I was sure about - the increased noise the problem caused I tend
    to think is in my head.
    Tom Hawley, Nov 16, 2005
  3. anvil

    Ken Guest

    I have a v6 and have had the same problem - or very similar. On seeing
    your post I jacked up my vehicle - the whole exhaust sytem seems to be
    firmly intact. Nothing seems about to fall off.

    So the mystery remains - assuming my and Anvil's problems are the same.
    But it was nice to have a possibility to check out.

    The vehicel was in for service a few days ago and I did not mention the
    problem but it is still present.
    Ken, Nov 17, 2005
  4. anvil

    Tom Hawley Guest

    You're probably lucky its not that - it wasn't cheap to fix at that end.
    Still half as cheap as Kwik Fit originally quoted me, although once
    they'd had their poke around it only took another 4 miles or so to fall
    off so its not like they did nothing for me...
    Tom Hawley, Nov 17, 2005
  5. anvil

    Nom Guest

    One of the engine mounts often goes on the V6 406 - I can't remember which
    one though ! It's fairly cheap and easy to replace. I seem to remember the
    break can be pretty hard to spot !
    Nom, Nov 17, 2005
  6. anvil

    anvil Guest

    Thanks guys/girls (must not assume anything...)
    When I had the deaf mechanic from the dealership listen for the
    'clunk', he did mention that they could book the car in to check the
    engine mounts. That's exactly what it sounds like - the noise caused by
    a rocking motion , subtle and consistent. The service manager naturally
    couldn't hear a thing....... Interesting to read the other replies.
    Since my car is under warranty, I'll get it looked at and let you know
    what is found.
    anvil, Nov 17, 2005
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.