Timing Belt Eating Itself . . . PLEASE HELP

[jtanguay]

he says his motor was rebuilt 80'000km ago with a new short block.  it should barely be broken in at this point...  i wonder if the two piece thrust bearing was used, and that crank problem is occuring?

[1985JettaTD]

what is this crankl problem that your talking about, i thought that there where only that problem on the 1.9 and not the 1.6

[myke_w]

I recently had to rebuild a IP because the bushing was worn out causing the belt to run off center.

Ditto,
I put a used pump on a customer car and it came back 6 months later with a really skinny belt.. replaced pump with a rebuilt one with new bushing.. works like new..

If the block is rebuilt then the int shaft brgs should have been done.. kind of eliminates that possibility.

I am highly skeptical of the 2 piece bearing causing that, there would have to be extreme wear on all the journals for any misalignment of the crank.

FYI the 2 piece bearing issue is the one where a 2 piece collared thrust washer #3 main is used instead of a the factory style 4 piece main bearing with separate thrust washers.

[janb]

If the pump was off, and it worked ok before, I'd start there, and shim it if necessary till it runs straight.  I had one eat itself at 40k, and I wasn't happy, Now they get checked at every oil change.

[D1ES3L]

I've come across something similar..  not sure if your belt does it, but my belt use to walk across the pulleys (side to side), which caused it to rub and fray. I replaced the belt with a new one and it was fixed.

[1985JettaTD]

we pulled the pump off today and found that there was some side to side play in the pump, brought it to our parts guy and he side that there is something wrong with one of the bushings. will bring it back to the place we had it rebuilt at to have it fixed under warranty. will post back when it comes back from the shop

[935racer]

I am thinking brackets...

Seen this before, make sure ALL the bolt are in.

There should be 4 bolts holding the pump bracket to the engine under the t belt cover, than 3 bolts holding the pump, than 1 bolt from the alternator bracket tot he pump bracket, than 2 bolts for the 90 degree angle bracket to brace the pump bracket, and 2 more on the same bracket that go into the engine to hold it true, than finally 1 last bolt that goes through that same bracket with a large cone nut that braces the back of the pump.

So there are 13 bolts you need to check, check them all.