meego
Well-Known Member
I would suggest something hasn’t been aligned or seated properly and the belt has wondered.
robbiemcvee
Active Member
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
Active Member
robbiemcvee
Active Member
thanks for that
Rougharse Racing
Well-Known Member
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
Active Member
it was fitted by a local specialist, your right though there is no evidence of it rubbing
Rougharse Racing
Well-Known Member
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
Active Member
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
Active Member
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
Well-Known Member
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.
ifloochies
Well-Known Member
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.
