robbiemcvee
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300tdi timing belt help
- Thread starter robbiemcvee
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tottot
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Belt ran out of true ? Tension or idler pully bearing fail ? Crank pully came loose ? Have you found out yet what other damage you have
I would suggest something hasn’t been aligned or seated properly and the belt has wondered.
robbiemcvee
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Thanks for the replies, had a couple of push rods bent and one of the rockers has snapped, so ive replaced all the push rods and the broken rocker. Bought a full kit of seals and pulleys, ive aligned all the markers and the keys, but i think ive seen somewhere where there are 2 lines on the flywheel that give the correct alignment for the flywheel - but i cant for the life of me find the youtube video or any reference to these markers on the 300tdi?
robbiemcvee
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robbiemcvee
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thanks for that
Rougharse Racing
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Although your belt has been rubbing on the cover, there does not seem to be much wear on the belt and probably not the reason it failed.
If it was rubbing badly, the front edge would be uneven and the timing cover would be full of black fluff from the belt.
Was the belt tensioned properly with a flex type torque wrench?
If it was rubbing badly, the front edge would be uneven and the timing cover would be full of black fluff from the belt.
Was the belt tensioned properly with a flex type torque wrench?
robbiemcvee
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it was fitted by a local specialist, your right though there is no evidence of it rubbing
Rougharse Racing
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Are there any clues at the ends where it has snapped?
At least timing belt failure on a TDi isn't as catastrophic as most modern engines.
At least timing belt failure on a TDi isn't as catastrophic as most modern engines.
robbiemcvee
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IME, that tend to lead to oil entry into the timing case - but your timing case doesn't look too bad ...
+1 - Doesn't seem to be much else that can have caused that, based on what we know so far ....
robbiemcvee
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its a dayco belt, i think i'll just put this back together and hope it doesnt happen again
- Dayco might be interested in that, maybe... certainly worth contacting them IMHO ...If you're going it DIY ( which I'd strongly advise ), then the vid posted above in post #7 is a fine method
mick the builder
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Mike on Britannica restoration showed the cause of over tightening a timing belt. It puts wear on the Injection pump pulley. This make the belt ride forward and snap, cause the wear you have on the cover.
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It looks like something has suddenly stopped and the belt didn't.
ifloochies
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Yup, looks like it.
As said, it was rubbing on the case but that didn't cause the failure.
There have been instances where the belt was found to have been worn down to half its width and held till it was found in the nick of time.
