Author Topic: Timing Belt Eating Itself . . . PLEASE HELP (Read 4367 times)

1985JettaTD · « **on:** January 20, 2008, 08:08:13 pm »

timing belt on my 1985 1.6TD has been slipping off the pullies since i have replaced the injection pump. told to fix the problem we have to replace the Intermediate shaft pullie with on that doesnt have a lip on it. today we did that and now the belt is being eaten at an even faster rate. 2mm in about 50km. we have no idea what would cause this and need any ideas you might have please help, Thanks very much

blkboostedtruck · « **Reply #1 on:** January 20, 2008, 08:14:27 pm »

are you missing any I.P. bracket bolts?
Duane

1985JettaTD · « **Reply #2 on:** January 20, 2008, 08:20:40 pm »

we were and they have been replece, that is how we first found out the the belt was been eaten

jtanguay · « **Reply #3 on:** January 20, 2008, 08:28:34 pm »

i wonder what is 'eating it' does it rub on the block side or the cover side? did you replace the timing belt or just the pump?

1985JettaTD · « **Reply #4 on:** January 20, 2008, 08:33:43 pm »

it is rubbing on the outside cloest to the fender, seems to rubbing the most down lower on the crank. there was alot of wear marks the pullie that is on the crank that gives power to the alternator and pumps.
when we did the IP we replaced timing belt aswell

jtanguay · « **Reply #5 on:** January 20, 2008, 08:47:56 pm »

did you remove the crank pulley? if so did you re-use the bolt? maybe there is too much play in the crank down there? maybe time for some new bearings

1985JettaTD · « **Reply #6 on:** January 20, 2008, 09:13:09 pm »

motor was rebuilt less the 80000km ago with a new short block so all the baring are new and there was no play in crank

1985JettaTD · « **Reply #7 on:** January 20, 2008, 10:06:27 pm »

anyone know anything what it might me be please and thanks

Vincent Waldon · « **Reply #8 on:** January 20, 2008, 10:17:17 pm »

The usual cause is a mis-aligned pump bracket or in extreme cases a very worn main pump bearing.

.Did you replace the missing bolts with official VW parts ? When you tightened the bracket was there any free play that could have caused the bracket to be misaligned ??

Some people have reported needing to shim the front of the pump slightly... never needed to do it myself but others may chime in.

westcoaster · « **Reply #9 on:** January 20, 2008, 10:19:04 pm »

Quote from: "1985JettaTD"

motor was rebuilt less the 80000km ago with a new short block so all the baring are new and there was no play in crank

Where did you get your short block? (apologies for the hijack... you can also email me [email protected])

blkboostedtruck · « **Reply #10 on:** January 20, 2008, 10:39:51 pm »

you might try a strait edge accross the sprokets and see any gaps are aparent? you would need one long enough to cross the whole sprokets?
i hope you understand what i'm trying to explain because i'm not sure how to explain it?
thanks Duane

1985JettaTD · « **Reply #11 on:** January 21, 2008, 01:32:06 am »

we have tryed the strait edge across them and they are all lined up, and that is why we are confused it is like there is nothing wrong but the freakin belt is just getting up and walking itself in to the other pullies to piss me off

Op-Ivy · « **Reply #12 on:** January 21, 2008, 05:19:55 am »

Quote from: "Vincent Waldon"

The usual cause is a mis-aligned pump bracket or in extreme cases a very worn main pump bearing.

I agree with the main bearing idea. Especially if your car has 600,000km like it says in your signature. Has the pump ever been rebuilt?

rabbitman · « **Reply #13 on:** January 21, 2008, 04:08:31 pm »

I would say grab all of the sprockets and pull them in the direction the belt pulls 'em to see if they're loose. I recently had to rebuild a IP because the bushing was worn out causing the belt to run off center. I've heard of Int shafts causing this problem to. Good luck

blkboostedtruck · « **Reply #14 on:** January 21, 2008, 04:23:51 pm »

how about the correct tightness of the belt? is it over tight where the pump wore out ? thats all i can think of?
thanks Duane