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94 T5 - could my timing belt been off a tooth? Topic is solved

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
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Clemens
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94 T5 - could my timing belt been off a tooth?

Post by Clemens »

When redoing my timing belt (but only after removing the tensioner) it seemed to me that my timing marks seem odd right now. Could I've been running with the exhaust side 1 tooth of for 7 years without noticing?
How many teeth can the cams benoff w/o causing any damage? Can't be much, I guess.
Last edited by Clemens on 09 May 2024, 14:34, edited 1 time in total.
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misha
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Post by misha »

2.
3 teeth off is a game over.
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rguzz
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Post by rguzz »

You'll notice the difference when it's timed properly. Mine was off a tooth for years also, then when the interval for replacement was up, voila, ran smoother and a bit more peppy.

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Post by abscate »

If you detune a T5 by one tooth, you get an R !

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Post by erikv11 »

Also timing belts can stretch, it may have just been that especially if it appeared to be more like 3/4 of a tooth etc.
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Post by hausmeister »

Mine was also off by a bit, I didn't do the last replacement myself but shop said so. Also finally made the car perform properly, I did have a thread here because it had no power in high rpm :D
My guess is that there are some people changing them that don't know what they are doing. Doubt it jumped by itself.
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Post by Cees Klumper »

When I replaced my timing belt two years ago I did so very carefully, and yet after double-checking I found it was one tooth off, so I wasn't careful enough. I corrected it before starting the engine. The engine ran better than with the old belt, which I found slightly, slightly longer than the new one. It became noticeable more fuel efficient as well. So perhaps you caused the 'one tooth off' if you did not really check the timing marks before taking off the old belt.

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