hi all trying to work something out.
have been reading quite bit on net about diesel engine cambelt change, seems garages local to me think put pins in change belt pull pins back out perfect timing.
but it seems there is a last bit of the procedure where vcds or vag-com needs connecting to check the torsion value of the injection cam.
seems when fitting belt the injection cam can move maybe a couple degree with the oval slots, also because of the oval slots on injection cam when locking pins installed sometimes not a tight fit can allow another couple degree error.
i am by no way a engineer so correct me if i am incorrect.

from what i have read after belt change you hook up vcds then enter
1 engine
2 measuring blocks
3 move up to group 4 then 4th box along gives you a torsion value.
it is this value that needs set up again after the belt change as even with pins locked there is chance of maybe 4-5 degree movement.
i believe the vw recommended is between 0.0-0.5 torsion value but spec is between -3 & +3 so seems 0.0 is smack in the middle but hard to acheive so 0.5 is as good
why when there is loads info on net that the optimum is 0.0-0.5 why all the garages local to me say there is absolutely no adjustment.
reason for me writing this is i had my car scanned after belt change my torsion value was -2.9 retarded almost bottom of the scale.
my car is hard to start & not so great on diesel which i have read is a symptom of retarded timing but i am struggling to get a garage to adjust as all dont seem to know what i mean ?
can anyone chip in to this if they have had any info on this.

phew !!!!!!!
hope i described this well enough.