I have a chance to purchase a 94 audi 90 with a v6 2.8 I've never worked on one of these - ive rebuilt 1.8 and 2.3 from the '80's. Can any one tell me if there are any chronic problems with these engines and what to look out for when buying one. Are they as reliable as the 1.8 - mine seems to go on and on and on even with a little abuse.