timing chain replacement .

Discussion in 'Engine' started by martyz, Aug 13, 2011.

  1. martyz

    martyz Hardcore MB Enthusiast

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    Hi guys, having read a number of posts regarding timing chains, there seems to be some ambiguity as to when,or if indeed ever it is necessary to change the chain.Having had vehicles in the past with cam belts that have snapped and having to deal with bent valves etc makes me slightly nervous.

    Would be grateful for some idea of crucial mileage marker,or initial signs/symptoms of pending failure.

    I have also noticed more failures reported on the more powerful engines,is the torque a factor.

    I have a W201 with 190k on and a W202 with 130k both with original chains.

    kind regards

    Martyz.
     
  2. khimani_mohiki

    khimani_mohiki Hardcore MB Enthusiast

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    turn the engine to TDC, with the rocker cover removed you can check for chain stretch by looking at the misalignment between the marking on the cam gear and the marking on the cam tower.
     
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  3. Will

    Will MB Club Veteran

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    Your M111 engined C200 and M102 engined 190E 1.8 both have duplex chains. The timing chains are very reliable, and failure would be very unusual - so unless you are experiencing any issues I would save your budget towards more appropriate servicing/repairs - ie rust, auto box, head gasket issues etc.
     
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  4. jaymanek

    jaymanek Authorised Forum Sponsor Authorised Forum Sponsor

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    Remember that misalignment can also be due to skimmed heads etc.

    I would possibly think about it on the 190E with that mileage, chain and more imprtantly tensioner.
     
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  5. OP
    OP
    martyz

    martyz Hardcore MB Enthusiast

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    Thanks jaymanek,will take that on board.Had a look at your gallery,you have some stunning cars.

    cheers Martyz:thumb:
     
  6. ss201

    ss201 Hardcore MB Enthusiast

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    +1

    Unless you have a very good reason to suspect your timing chain is faulty, best to leave it alone. Very rare for these to snap.
     
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  7. peapod

    peapod Hardcore MB Enthusiast

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    I changed the chain on a 200k miles 230 TE duplex. I regretted it the old one was fine. Also their is a risk of dropping it down the case.
     
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