flat
Well-Known Member
And it's not knowing this that causes people to label adjustable spanners as '****' because they ' slip' etc
And it's not knowing this that causes people to label adjustable spanners as '****' because they ' slip' etc
'Amen' to that.....used properly they are a useful tool....I'd advocate the correct sized spanner/socket to begin with, but failing that and for 'Field' use an adjustable used properly is a handy companion.
Hi,I had similar symptoms to you when my timing belt failed last year. Quite a bad failure too like yours.
After refitting the new timing belt kit, new push rods & rocker arms we stuck the crank damper on and ran the engine up without the timing cover on for a short while. To see if we could see any issues as to why the belt had failed.
What we did notice was, the belt was running off the back of the FIP and cam sprocket (you could see it within minutes). It must have been running off gradually over a couple of thousand miles and rubbing on the engine casing, eventually snapping. The belt hadn't been fitted too long.
Anyway, we swapped the cam and FIP sprockets over, which in turn the belt was grabbing on the other side of the teeth. And it's been absolutely perfect ever since. I'm not sure if the sprockets wear at a certain milage, or even warp in someway. But all I can say is, it fixed mine.
I just wanted to throw that out there in case you end up having the same trouble.
Not sure if this will get read, so long after the original posting, but here goes..
Had same problem after renewing timing belt, tensioners etc. Done the job about 3 times on previous occssions with same engine (now done about 230k miles) with no problems.
FIP upgrade was fitted at 45k miles, so that was not the issue.
Suspect I may have not properly cleaned the locating points for the tensioner and this caused the belt to be thrown forward. Lip on front of crank pulley was sheared off its spot welds, the lip ring shattered and became a collection of razor blades that shredded the cam belt and dumped me whilst in the 3rd lane of the M25 clockwise just as I approached the M4 slip road entering the M25 - in the morning rush hour to boot, very exciting !!
Anyway, after rebuilding and before replacing the cover, I used a hole saw to produce an inspection hole (20mm diam) in the cast aluminium cover, that aligned with the belt as it left the top of the FIP sprocket on its way to the cam sprocket. Was a little apprehensive that the cover would be weakened and eventually crack but, 20k miles later no sign of anything untoward.
The up shot is that I can a) see the general condition of the belt (freying, tooth errosion etc) b) use the depth gauge end of a vernier caliper to check if it is slipping either back or forward off the sprocket.
I'm really quite chuffed with the "new hole" in my 300tdi and frequently stick my finger in it (with engine very much stationary of course !! )
Hope this is helpful.
It was quite a relief
I'm afraid good ole gaffer tape has been put into action. I played around with several ideas for a "bung" but couldn't convince myself the object may fall into the timing cavity. If "gaffer" hadn't done the job I suspect I'd have machined something up with a "top hat" sort of profile but, underneath all else, I've become a lazy b***er !!
