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A170 cdi knocking noise

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by gray11, Nov 29, 2012.

  1. gray11

    gray11 New Member

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    Joined:
    Nov 29, 2012
    Location:
    brentwood, essex
    Your Mercedes:
    A170cdi wreg 2000
    Hi all, ive had my w reg A170cdi for about 6 weeks and it was running
    fine until 2 days ago when the engine started making a knocking noise on
    tickover. this has got louder but as soon as the car is revved or driven it sounds fine. ive checked the pulleys and they seem fine. it was serviced approx 4000 miles ago and all fluid levels are fine and no obvious leaks.
    has anyone got any ideas of what to check next ?
     
  2. Kyliewww

    Kyliewww Senior Member

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    Joined:
    Mar 8, 2010
    Location:
    Essex
    Your Mercedes:
    Astra 'H' CDTi; '89 MK2 Orion 'Ghia'
    Has it just started with the colder weather?
     
  3. OP
    gray11

    gray11 New Member

    Messages:
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    Joined:
    Nov 29, 2012
    Location:
    brentwood, essex
    Your Mercedes:
    A170cdi wreg 2000
    yeah it started about 2 days ago, its only on tick over though and the car drives fine otherwise.
     
  4. WG M-B

    WG M-B Senior Member Authorised Forum Supporter

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    Joined:
    Dec 5, 2010
    Location:
    North west london
    Your Mercedes:
    C63 Wagon in black
    Injector spray pattern?
     
  5. Kyliewww

    Kyliewww Senior Member

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    543
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    Joined:
    Mar 8, 2010
    Location:
    Essex
    Your Mercedes:
    Astra 'H' CDTi; '89 MK2 Orion 'Ghia'
    Does the W168 have an aux' heater? As soon as it gets cold, my 169 makes a terrible noise on tick over but I get instant warm air.
     
  6. OP
    gray11

    gray11 New Member

    Messages:
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    Joined:
    Nov 29, 2012
    Location:
    brentwood, essex
    Your Mercedes:
    A170cdi wreg 2000
    what would be wrong with the injector spray pattern ?
    i dont think it has aux heater.
    i have noticed that if i try to pull away gently the car judders but if i pull away hard its fine. its a clutchless manual (not sure what this transmission is called).
     

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