I have a 92 Volvo 960 with a 93 engine. I am concerned about the serpentine belt tensioner. The pulley recently destroyed itself so I replaced it with another one only to discover that the belt doesn't sit in the center of the pulley properly but seems to be riding more to one edge and possibly hanging off the edge slightly. I don't see any way to adjust this, and I have begun to wonder if someone put the wrong tensioner on that engine. The tensioner part number is 6842019 and the pulley I just installed is 6842620. I have had numerous conversations with the parts department at the local Volvo dealership and have even called IPD, but nobody knows whether I have the right parts on the car or not. I loved my 240 but this 960 seems to have one problem after the other. The original engine block just up and cracked one day, the brakes are totally warped and barely seem to work, the transmission is always busy hunting around through the gears unnecessarily, and often when I'm slowing down the converter locks up and the rpms drop to around 500 RPM and the car starts sputtering and chugging until it finally unlocks, I could go on and on. I mean its just one thing after another. And everything is so darn expensive, $300 for this $600 for that and the car barely has 113,000 miles on it! Will someone please help? I'm about ready to send this thing off the nearest cliff! Plus I keep hearing about different ways to route the Serp belt but no has any pictures to illustrate what they are talking about. The one on my car is so long there was too much slack when I tryed to route it the way the dealer's book showed so I had to come up with my own way. I don't know if that's ok or if thats just another wrong part on my car. I was also told that someone put the wrong T-belt on the car. Is the 93 engine the one that takes the 30K mile T-belt or does it use the better one like the 94 engine?