I ordered a timing belt kit and made sure it contained all rollers and tensioners when ordering. I got a kit that includes the belt, and 2 rollers. Should the spring piston part be included? Kit number supplied was 06A 198 199 B. My car is a 2002 1.8 (non-turbo), is the spring part re-useable? Audi garage also said they never renew the engine mount bolts, not too sure if I trust them.