[shepherd111]

Hi, first time posting but as I just successfully changed the belts in question, I thought I would add an explanation in case it can help someone else in the future.
My car is a C30 2.0 petol Rdesign 2012, a lot of the videos I was seeing on YouTube had different auxiliary belt setups to my car.

The belts I have just put on where as follows:
5pk 705 (shorter belt to AC compressor)
6pk 1249 (longer serpentine belt)

I know other people have mentioned you can now get a replacement kit from Volvo that changes the static tensioner on the longer belt for a sprung one as well as the belts. This would likely make fitting much easier. I did not do this I just changed both belts like for like so I’ll explain some tips to make it easier.

For the serpentine belt I fed it on to all the pulleys first, but the tensioner. Then with the tensioner pulley unbolted I fixed it to the belt (it’s a tight fit), then managed to thread in the lower studded bolt fully and tightened using the hex head. The tensioner needs to be at an angle to do this. Then used a podger in the hole located in the top of the tensioner to pivot the tensioner in line with the other two holes. I think this is probably the original intended method and doing it this way is not that hard. I struggled for a while trying to Jimmy the belt on using screwdrivers which did not work at all as it is very tight.

For the shorter belt I did have a tool borrowed from a friend that I’ll include in photos but if not the code on the tool says 07740000 but I’m not sure if it’s the specific one for Volvo cars or a more general one but it worked for me. But basically I cranked the belt round onto the drive pulley by turning the drive with a ratchet (22mm socket). I also removed the cover from around ac compressor pulley, this likely isn’t necessary but it’s not hard to take off and refit after.

One more tip I was told about, was to remove, or at least loosen the spark plugs to make turning the drive pulley easier. I changed all the plugs just because I don’t know if they had even been changed.

I will add some photos. Hopefully this explains better what I am trying to say. Hope this helps someone someday.