This is not novice work, but is doable. There are a few tutorials online, Google will help you find them. One is on Matthews.

There are 2 'special' tools you will need to make: cam position tool, just angle iron with a couple of holes drilled in it to keep the cams orientated for install. The other is a cam cover hold down tool, a couple of spark plugs with welded rods, threaded at the top, to hold down the cover - the cover bolts will not handle the torque individually.

You will need new head bolts, lots of them.

The best write up is in the 850 Haynes manual, if you like print. One of the pictures is upside down (cam cover) by design.

You will need RTV and a small foam roller to apply it with. Volvo is expensive, but will allow the cam cover to come off again if needed. Avoid RTV that is too strong, this is aluminium to aluminium we are talking about.

There are a few people here who have do this and will be glad to help.

BTW, when you try to get the old timing belt off... If after you have removed the little dirt shield on the bottom and you cannot get the belt out at the crank, just cut the belt. The new belt will slide right in.

Make sure you get the proper sized belt! The engine number is on the belt cover as well as on the engine - firewall side, of course.

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My name is Klaus and I am a V♂lv♂holic