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Belts and timing belt life span 200

posted by  JimN696 on  Fri Jul 23 05:52 CST 2010
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last visit: Mon May 6 17:14 CST 2013
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I was doing some routine maintenance on my '87 today. The drive belts are still pretty soft and pliable, not cracked or glazed after about 50K miles. I changed them along with the timing belt and tensioner when I dropped in a new '92 engine four years ago. My question is that I remember reading somewhere that Volvo changed the design of the timing belt somewhere late in the production run to one that lasted longer. Does anyone know when that change occurred and what the expected lifespan is? Since the drive belts look pretty robust, should I wait awhile longer to change them out?

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    Belts and timing belt life span 200

    uid 18083's pic
    posted by  lucid on  Fri Jul 23 06:32 CST 2010
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    last visit: Fri Oct 24 12:31 CST 2014
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    "My question is that I remember reading somewhere that Volvo changed the design of the timing belt somewhere late in the production run to one that lasted longer."

    Hi Jim,

    The change to the round tooth belt (and matching drive sprockets) for the B230 came sometime in the '93 model year. I believe this was coincident with the piston cooling oil squirters. See this excellent Photo Essay.

    IMO, the "lasted longer" part is a myth. For the B230F the replacement interval is still 50K miles. To the best of my knowledge, only the B230FD gets the longer (100K) interval. Why the FD is a mystery to me. It may have relate to having EGR, and/or the CA emissions rules, where (Ive heard) Volvo pays for emissions related equipment with a less than a 100K interval (just a guess).


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    Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.








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    Belts and timing belt life span 200

    uid 34776's pic
    posted by  Ryan_R on  Fri Jul 23 06:31 CST 2010
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    last visit: Tue Sep 24 13:46 CST 2013
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    New belt style started in the 1993 models. It has "rounded" teeth instead of the square ones. If the new motor came out of a '92, you'll still use the old style belt. Change interval is 50K miles for both. It's worth checking the front seals, too.

    For drive belts, they're pretty cheap... so if age is unknown or if one looks kinda funky, just change them all.

    -Ryan







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