I am just about to start the job of fixing the Vanos as per Caligular's advice. While I am in there and also doing the water pump, belts etc I thought of doing the seal behind the harmonic balancer on the crank snout. So that I can order and get it before I start the job can anyone tell me the size of the seal. Its a M50 B20 engine. I figure I may as well change it as it may have only done 185000k but it is 20 years old and I would much rather not have to go in again in 3 months or something like that when I have the opportunity to do it the easy way.
Thanks in advance.