[Dextrobrick]

Re: 2005 XC90 replace Auxiliary belt (jp6438)

IIRC you'll need a Torx T-60 bit.

If there are clearance issues getting at the tensioner with the bit fitted to a ratchet or breaker bar--IOW the tools will hit the unibody rail which runs right in front of the tensioner--then clamping the bit itself with really large vise grips and applying torque to said vise grips to relieve the tensioner--thereby forgoing any other attachments--can help greatly.

 

[Dextrobrick]

Re: 2005 XC90 replace Auxiliary belt (jp6438)

The tensioner is always under tension and will automagically rotate back to its maximum applied tension position when you let go of it. Be careful because it can snap back with force and cause injury.