In Reply to: read it, but i've heard that the 7 series......... posted by john///m3 on March 20, 2002 at 00:13:39:
Without going too much off topic, Audi has an update kit for early A4 1.8turbos which changes from an automatic gas filled tensioner to a manually adjustable tensioner for the timing belt. The reason being that when the engine is driven hard the belt tightens and tension is increased which has led to stripped/broken timing belts. Ouch!
On a VW VR6 which uses a tensioner VERY similar to the Euro M3 piston tensioner, I have seen the tensioner rail worn to bare metal on cars with less than 100,000 miles. I don't see why the Euro M3 tensioner would be any different in operation.
As for wear with the stock TCT, I just rebuilt / upgraded my engine after 190,000 miles and the tensioner blades were worn, but given the mileage, they didn't look that bad. So, I checked the spring free length (ok)and am using a new "original" TCT.