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Thread: Tensioner Failure?

  1. 06-22-2005, 05:06 PM #1
    RMartin
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    Tensioner Failure?

    What are the signs of collapsed chain tensioners? Would the engine run? I've had some timing issues with my car since I bought it. Got the Dizzy being looked at now, if it's not that I don't know where else to look.
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  2. 06-23-2005, 07:31 AM #2
    ttweed
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    Quote Originally Posted by RMartin
    What are the signs of collapsed chain tensioners? Would the engine run? I've had some timing issues with my car since I bought it. Got the Dizzy being looked at now, if it's not that I don't know where else to look.
    The sound is most noticeable, and comes from the cam chain covers. At idle, it's as if someone is shaking a tin can filled with marbles at the back of the car. When the engine is revved, the sound changes tone and diminishes as slack is taken up in the chain as it spins faster, but then it comes right back as revs drop.

    The engine will still run in an early stage failure, but it is adviseable to shut it down as soon as possible and fix it, as when the chain becomes loose enough to skip a tooth on the sprocket, you are SOL when the valves contact the pistons due to being mis-timed. The dizzy controls ignition timing, the chains control cam timing. Two different issues.

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    TT
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  3. 06-23-2005, 08:52 AM #3
    CurtEgerer
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    Yeah, it's unmistakable - a very metallic, very expensive sound. It happened to me with my first 911. I didn't know what it was, so I drove it home and then drove it to the shop (10-15 miles) the next day! Somehow, I didn't damage anything ....
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  4. 06-23-2005, 12:53 PM #4
    RMartin
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    Well no bad noises so I'm hopin its the dizzy.
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