Loud timing chain
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Thread: Loud timing chain

  1. #1
    New Member danjetta is a jewel in the rough danjetta's Avatar
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    Loud timing chain

    Hey guys,

    I've got an '07 Jetta 2.5 with a loud timing chain or chain tensioner. It's still under warranty but the dealer swears it's not a problem.

    Being that I don't trust the dealership farther than I can throw them, I thought I'd investigate myself.

    Here's a sample (not mine): http://www.youtube.com/watch?v=JYP1oUL9WAE
    Here's the same thing on a Mustang (can hear it better): http://www.youtube.com/watch?v=Bv1XiZiJ-6w

    What do you guys think?

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    Guru Member damionmyst has much to be proud of damionmyst's Avatar
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    Re: Loud timing chain

    either chains and guides....or rod bearing(s)

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    Guru Member BIGGREEK has a brilliant future BIGGREEK has a brilliant future BIGGREEK's Avatar
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    Re: Loud timing chain

    ok this is a more common issues with the early 2.5s (e.g, 2005-2006), however it is still possible with the later cars. How many miles do you have on your Jetta? And do you have it warrantied with what dealer? I have an 08 Rabbit (that has 133k miles) with the same motor, and this noise came in about 10k miles ago. Its very very subtle. Its most likely upper chain noise, and its probable that its the guides wearing out.

    And rhett.....there is a HUGE difference in noise between lower end noise and timing chain noise.
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    Re: Loud timing chain

    Timing chain noise sounds like marbles in the engine. Rod bearing noise sounds like bowling balls going through plywood.
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    Re: Loud timing chain

    just throwing some possible scenarios out there..ive seen an engine with a bad rod bearing and it wasnt as loud as you guys claim..sounded like a timing chain issue...fixed the bearing..ba-da-bing all the noise gone

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    Guru Member BIGGREEK has a brilliant future BIGGREEK has a brilliant future BIGGREEK's Avatar
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    Re: Loud timing chain

    changing the rod/main bearings take usually more time to change then chain(s)....just sayin. Yes there are different "volumes" of knocking noises, but the two are very dissimilar no matter the amount of noise.

    This is a rod bearing:



    this is a timing chain

    Last edited by BIGGREEK; 01-03-2012 at 10:34 PM.
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    Re: Loud timing chain

    When a guide breaks or the chain stretches you will get a camshaft allocation fault and the check engine light will go on. The early 2.5's up[ to early 07 have a chain design that is naturally loud. They redesigned it in 2008 for a quieter chain. Some noise is very normal. I had a late build 07 and I only heard a little noise once in a blue moon on cold start for a few minutes then it went away. Some I hear are really loud and they stay that way for 10's of thousands of miles without problems. If there is no fault and the engine runs fine then I would be hard pressed to go further. If, however, the noise started immediately while driving or overnight then I would be concerned.

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    Re: Loud timing chain

    Thanks so much for the feedback, guys.

    We bought the car used from a dealer in Annapolis with 75K miles on it and bought the extended warranty (which is almost up). The car now has 105K miles and runs well. Every once in a while (about once a month) it'll spit and sputter like it wants to die after a cold start (like the whole car shakes)--but runs fine once it warms up. And there's no CEL.

    The warranty is almost up and we wanted to get any potential 'big issues' sorted before we're on our own.

    Whenever friends walk by our car they always ask what's wrong with it (the noise is like BigGreek's second video). We took it to the dealer and the techs (including the shop manager) claimed they heard nothing unusual. I felt like I was in a ghost movie, pointing at a demonic monster and everyone saying, "what monster?" We even compared it to another 2.5 Jetta, which was dead silent (smooth while running) and the techs still claimed they heard no difference.

    My fear is that they're avoiding the timing chain issue because we have the warranty and, in a few miles when the warranty's up, is when the chain is going to skip and break something.

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    Re: Loud timing chain

    i hate that dealer in Annapolis..their service department is horrible..ive had MORE THAN ONE bad experience with them...they are complete PHUCKTARDS..do your self a favor and take it somewhere else for a second opinion

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    Re: Loud timing chain

    Another dealer isn't going to honor his extended warranty though.
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