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Timing Belt failure and Auxiliary Pulley Failure

posted by  TavernT5er on  Sat Dec 16 19:25 CST 2017
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last visit: Fri Aug 29 04:42 CST 2014
[RELATED]

Have 02 V70 T5 Wagon with 208k on it. Timing belt was replaced approx 2 years ago at 186k along with tensioner and cam seals. Car turns over (nothing is seized) but cams obviously don't move due to slack in timing belt.

Timing belt failed. As did the auxiliary belt - it shredded. Pulley was no where to be found. Aux belt was completely shredded: Questions.

- When one belt goes, does it cause the other to go? Just curious for future reference.
- Safe to assume there's valve damage?
- Any idea of how long it takes to pull the head (hrs)?
- Anyone with experience on what causes premature timing belt failure. Used Volvo Tensioner and Conti Belt.
- Reason all of the above - deciding whether to repair or scrap the car.
- Anyone with link(s) to good head removal instructions - I have a haynes but always value hands on from brickboard.

Anyone and all input is greatly appreciated.

jk








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    Timing Belt failure and Auxiliary Pulley Failure

    posted by  KlausC on  Sat Dec 16 20:27 CST 2017
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    last visit: Fri Oct 24 10:15 CST 2014
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    Try not to panic yet. When the Sbelt fails, it can get caught in the Tbelt and cause the Tbelt to slip.

    Which pulley broke off? From the Sbelt or Tbelt?

    If the Tbelt is slack and no longer turning the cams, you bent a couple of valves. This will be an 8+ hour job for an experienced mechanic. 2-3 days for you. And the cheapest route is to find a head in a pick&pull that looks close to your year and use that. It is still not a fun job, bending over the engine bay all day.

    There are outfits that sell reconditioned heads, but I would only go that route if I were keeping the car for at least 10 more years, or it was a 1995 T5R.

    The labor charges vary from state to state, and city to town.

    Because of the VVT on your engine, you will need a cam lock tool. You can search Ebay for a good one. The Haynes manual is good for torque specs and general engine work, but things change from year to year.

    If you decide to DIY, consider replacing the 20 valve stem seals while the head is out of the car.

    There are some nice 2004-6 examples on the market now...

    --
    Keeping it running is better than buying new








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      Timing Belt failure and Auxiliary Pulley Failure

      posted by  TavernT5er on  Sat Dec 16 22:36 CST 2017
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      last visit: Fri Aug 29 04:42 CST 2014
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      Thanks Klaus, you actually helped me when the cam seals went on this car 2.5 years ago.
      The s.belt pulley is the one that was gone when I opened the hood. My daughter was driving the car and heard a clunk. Then the car stopped running.

      There was shaved belt material in the engine compartment.
      All the was left of the s-belt was a thin band.

      I haven’t opened up the timing belt side cover to see how bad things are.
      I do have the cam lock tool.

      I’m just wondering if the tbelt tensioner was set a hair too tight. And over time it stressed the belt.










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        Timing Belt failure and Auxiliary Pulley Failure

        posted by  KlausC on  Sun Dec 17 20:03 CST 2017
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        last visit: Fri Oct 24 10:15 CST 2014
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        Get your 10mm socket and take off the T-belt cover, you might be OK. Check the timing marks.

        How did you come to the conclusion that the T-belt was not turning? Lift the oil cap?

        If the T-belt is OK, you can do a compression test. Bent valves will show zero.

        --
        Keeping it running is better than buying new








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          Timing Belt failure and Auxiliary Pulley Failure

          posted by  TavernT5er on  Mon Dec 18 05:32 CST 2017
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          last visit: Fri Aug 29 04:42 CST 2014
          [RELATED]

          I pulled off the top cover to expose t-belt and was able to pull it up - very loose.
          I’ll take the cover off to see what went. Assuming the t-belt tensioner failed. Or at least the tensioner.







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