How did he manage to get the Golf back to your house ? Does it run ?
In the meantime, I will ask my technician. Timing and fitting of cambelt requires comprehensive equipment to get the setting just right, for the turbo models in particular. I don't believe it is a question of wiping the dirt off. You don't give this job to a fitter !ÂÂÂ
I will do dismantling work, my qualified tech guy does the real business.