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Thread: Timing chain or belt?

  1. #1
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    Timing chain or belt?

    Does the 3.5 in the G6 have a timing chain or timing belt?? Is one better than the other??

    Thanks
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  2. #2
    Retired Moderator Photobucket
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    since its not overhead cam I imagine it has a timing chain, don't think GM is too fond of timing belts.
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  3. #3
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    Timing Chain.
    Colin.
    06 G6 GTP. 6spd.
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  4. #4
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    Timing chains stretch over time therefore cause timing deviations. Also they are noisy. But they are maintenance free and last the life of the engine.

    Timing belts do not stretch therefore precise timing is always maintained. They are also quiet. But they do eventually wear out and break so periodic replacements are required. If the engine is of an interference design, a timing belt breakage will cause major damage.

  5. #5
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    Chains do stretch, but not nearly as quickly as timing belts. A chain is more likely to break all together. I know of one GM engine thats prone to belt failure, the 2.4L Twin Cam. Garbage after 80,000.
    2007 G5 Base Model
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  6. #6
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    8000 pages in the service manual and no mention of timing belts or chains. Looks like its no worries as it will never need service!
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