1.9 TD timing belt sprocket - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

1.9 TD timing belt sprocket by Torchd on 03 Apr, 2008 02:14
Hey ppl!!

I read about the timing sprocket problem in 1.9td engines.... nothing has happened to my engine untill now... the engine is from a 97 golf so it prolly has the new type 12 point bolt.. but i heard thats not the rite cure and the bolt still breaks...

proper pix is known to be the TDI pulley and bolt... please tell me how its done and what are the parts needed from which VW TDI motor to perform this job?!!

Thanks!!
#1 by jimfoo on 03 Apr, 2008 03:47
Bolt and sprocket from 1Z or AHU.
#2 by Torchd on 03 Apr, 2008 04:31
Thats alll??

will i have to do anything to my crankshaft?? cuz i dont wana take it out of the motor...

i just checked out the existing bolt... its a 12 point but it says 10.9 on the head... where as according to QuickTD on vwvoxtex (http://forums.vwvortex.com/zerothread?id=1017820)

The older bolts should be 6 point and 10.9 or 9.8.
Wheres newer stronger bolts are 12 point and 12.9 shud be written on top.
So im confused!!
#3 by jimfoo on 03 Apr, 2008 05:57
Oh yes, you have to get it welded up, then machined down to fit the new sprocket.
#4 by slorimer on 03 Apr, 2008 11:23
Or if your lucky, some late model Mk IIIs have both the key and the flat so either crank sprocket will fit. The one issue I heard with just switching to the TDI sprocket is that its position limits your pump adjustment because it puts you at the ends of your elongated holes in the pump attachment brackets.
#5 by g-spec on 03 Apr, 2008 19:47
You can also have some dowel pins installed.....I did this on my TD without taking the crank out.....I know its not the best solution but its cheaper than remachinging the crank and it adds more security along with a new bolt and pulley!!!
#6 by Vincent Waldon on 03 Apr, 2008 20:36
Quote from: "Torchd"
Hey ppl!!

I read about the timing sprocket problem in 1.9td engines.... nothing has happened to my engine untill now... the engine is from a 97 golf so it prolly has the new type 12 point bolt.. but i heard thats not the rite cure and the bolt still breaks...

proper pix is known to be the TDI pulley and bolt... please tell me how its done and what are the parts needed from which VW TDI motor to perform this job?!!

Thanks!!

I personally feel that a fresh sprocket, properly-torqued fresh bolt, and the addition of the one-way clutch pulley on the alternator should make a stock crank hum just fine.

Assuming that the sprocket has never loosened in the past and the crank is in perfect shape !!

Since you can't be sure what bolt the PO used, nor can you be sure it was torqued correctly, it's probably wise to start over yourself with fresh parts.
#7 by Torchd on 03 Apr, 2008 23:02
Thanxx guys!

So can someone give me part numbers for the following parts..

Bolt and sprocket from AHU or 1Z engine

Bolt and sprocket from AAZ engine.

One way clutch alternator pulley.
#8 by Torchd on 18 Apr, 2008 03:15
Guys...?

Can anyone help me wid daa part numbers please?!!!