Giacosa said:
By Heck! I never want to change another timing belt i my life. If the marks are even microscopically out its got no go at all. Makes u wonder how many belts fitted in high street garages are slightly out. But hell thet'd prob do it better than me anyway!
AIUI
You can "only" be out by multiples of the teeth on the pulleys the belt runs on, and as far as I can recall it works out to about 12 degrees on the bigger one, which mucks up the valve timinig,
and the ignition timing on most Pandas.
Agreed there are mis-fitted belts out there,
but regarding garages versus home repairs - it's swings and roundabouts...
I'm probably smarter than the average mechanic,
but they have lots of experience of routine work,
I can mess about until I'm happy,
but they charge by the hour,
I sometimes have to improvise tools,
they should have the proper tools for the job,
I'm interested in what I'm doing,
they might not be...