Certified Volkswagen Nut
- Jul 10, 2006
- Tacoma 4x4 converted to TDI
yeah, super rare i ever do a belt job and the pump timing is dead on or even in the same placeTo me, having the hub's index pin inserted where it should go just helps to be able to start the car for the first time after belt service or pump replacement. I find that it will get the timing close to the blue line on the graph on a new or non-worn out pump. It is seldom left there anyway.
On the AHU/1Z pump you don't even have that advantage even though the shaft is keyed to the hub. You have to estimate where to locate the mount bolts in the slots. The pulley pin is there just to get the belt on the closest tooth choice. It does not seem that critical to be counting hundreds of a millimeter of plunger lift in a practical sense. There is always VCDS - basic settings to see where to put it.