It's good practice to renew the crank rear oil seal and also the gearbox input shaft seal while doing the clutch, particularly if there are signs of oil on the old clutch. It's a bit more work as you need to remove the flywheel, i'd suggest new botls for the flywheel on reassembly as i believe they're "patch bolts" with thread sealant already on that is activated when tightened.

Trial fit the flywheel to make sure it's in the right place using the old bolts first then fit the new ones one at a time, torquing them to the correct setting once you're sure the flywheel is fitted correctly.

Not sure about the bearing you mean, if you mean the clutch release bearing also known as the thrust bearing then you should have a new one in the clutch kit. If not, find one and replace it.

If you mean the pilot bearing/pilot bush/spigot bush that is in the end of the crankshaft for the gearbox input shaft to locate in, just clean it and give it a squirt of engine oil when you start the job. By the time you've done the rest of it, it should have absorbed enough engine oil so wipe the excess off, you shouldn't really need to ever change the spigot bearing/pilot bearing/pilot bush/spigot bush.

I hope that answers your queries, i think a little was lost in the translation but your English is way better than my Italian which mainly covers food and a few technical terms on plastic thermoforming machinery! ;) :D

Thank you Laird Scooby, you've been crystal clear!
So I think I'll find the remaining parts to do a well done job.

The bearing I was talking about is this one:
http://www.skandix.de/en/spare-parts...lutch/1001119/

I owe you a bottle of wine!

Ah, i didn't realise Volvo used actual bearings for the pilot bearings - many manufacturers literally use phosphor bronze bushes!

For the cost of the bearing, i'd agree with the advice you've already had and change it. For the sake of a few Euros it would be silly not to!

As for the bottle of wine, i'll take the thought as payment and get one tomorrow - Italian red of course and enjoy it while eating tagliatelle bolognaise! ;) :D

The failure was...the clutch plate.
https://i.imgur.com/wVCLiz2.jpg?1
I'm still hardly believing that the clutch worked fine until the last few kilometers, without slipping even on the motorway that i did that same afternoon.
Now it's time to put the new parts on their place.

Wow! As we say in the UK, you had your moneys worth out of that!

In other words used until the very last! :err:

I'm amazed the car actually moved under its own power with a clutch like that, i've seen many better clutches that slipped.

At least you've found the problem and can get it sorted, looking forward to the road test report now! ;) :D