Tick...tick...tick...on cold start-up

Discussion in 'Engine' started by punjabi, Sep 5, 2008.

  1. punjabi

    punjabi Hardcore MB Enthusiast

    Messages:
    110
    Joined:
    Apr 22, 2005
    Location:
    Surrey, UK
    Car:
    V230, 300TE
    When starting my 300TE (12V) first thing in the morning, it makes a slight continious tick...tick...tick...tick noise for a few seconds (about 3-5 secs) until the oil pressure needle hits the top and then quietens to normal tickover........is this due to low oil pressure at start-up? Any cure?
     
  2. Bri957

    Bri957 Active Member

    Messages:
    66
    Joined:
    Jan 7, 2008
    Just a sticky hydralic tappet. Nothing to worry about imho.
     
  3. Dieselman

    Dieselman Banned

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    34,206
    Joined:
    Jul 13, 2003
    Car:
    Peugeot 403 Convertible
    Try flushing the engine with flushing oil and filling with new oil and filter.
     
  4. Bobby Dazzler

    Bobby Dazzler MB Club Veteran

    Messages:
    15,347
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    Location:
    Mittel England
    Car:
    ML AMG-line Black Series
    Could it be the air purge valve?
     
  5. Dieselman

    Dieselman Banned

    Messages:
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    Joined:
    Jul 13, 2003
    Car:
    Peugeot 403 Convertible
    Could be. The best diagnostic tool for this type of noise is an engine stethoscope.
    I once traced a noise that sounded like a big end gone, down to a worn alternator bearing transmitting through the block.
     
  6. ms500

    ms500 Banned

    Messages:
    342
    Joined:
    Jun 18, 2008
    My 24v does exactly the same thing, I think it's probably due to the valve lifters being starved of oil until pressure rises. Nothing to worry about.
     
  7. Mark300SL

    Mark300SL 1962-2010. Gone, but not forgotten.

    Messages:
    1,647
    Joined:
    Jul 21, 2002
    I thought mine was a tappet, tapw when cold for a few seconds and then went quiet - its a blown exhaust manifold gasket :)
     

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