S320 cdi ticking noise + excessive smoke

Discussion in 'Engine' started by dannyfiveforty, Sep 2, 2008.

  1. dannyfiveforty

    dannyfiveforty New Member

    Sep 2, 2008
    Could these be related?

    Was told today that on the maifold the link between the motor and valves has broke and so they are stuck in the open position causing the rattling/ticking noise and the excessive smoke on harsh acceleration.

    Originally thought it was a leaky injector seal but all are fine...

    What else could be causeing the ticking (1500 - 2000rpm) and the smoke...?

    Thanks guys, Dan
  2. redfox

    redfox New Member

    Aug 27, 2008
    north east
    You mention a motor on your manifold. Is this the inlet port shut off motor linkage? This could cause smoke but lack of power too. Start with that if it is broken. Be aware that the straight six 320cdi engines all have a characteristic ticking noise audible when driving light throttle with the windows down. If it is a light ticking noise this is a normal combustion noise. Black smoke on these models not common apart from possible exhaust gas recirculation valve sticking open, likely on higher mileage vehicle. I have also seen a faulty rail pressure sensor or air mass sensor cause smoke. Hope this helps a little.
  3. tuikku

    tuikku Hardcore MB Enthusiast

    Apr 25, 2008
    Maybe some injector is broken, or leaks.
    -> injector test.

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