On a tensioner, I wouldn't change the pulley out. I now only replace the entire tensioner. I have had two tensioners on 15+ year old cars (and low mileage <50k miles) break when I was unbolting them. They are made from cheap pot metal that doesn't stand up well to vibration and engine heat over the years. They must develop stress cracks. I used to replace the pulleys but don't any more. Not worth my time to have to go back in and do it again later or risk the tensioner cracking apart while the engine is at speed going down the highway.
Hope this helps.
Ken __________________ 
1992 325iC M Technic appearance Diamantschwarz 5 spd. heated seats
1993 325iC Schwarz II 5 spd. SOLD
1997 318ti Active Boston Gruen, Sandgrau w/M Technic interior swap Millpoint Gray
1999 M Roadster Dakar Yellow II, Dinan Stage 3 software, high flow throttle body, and CAI
2001 Z3 3.0i Coupe Black Sapphire Metallic
BMW CCA 369408 |