Things done:
change spark plugs (NGK V-line)
change alternator belt
re-oil K&N air filter
change oil
change oil filter
new distribution belts
new distribution belt tensioners
edit 16-03-2009: I changed the distribution belts and tensioners today. The parts:
Two Gates belts and two SKF tensioners.
Removed the rear decklid:
The rear apron:
Removed sparkplugs, pulled the flywheel cap, removed intake elbow, alternator belt and the distribution covers:
Set the right markings on the flywheel while cylinder one was at a compression stroke, and then removed the waterpump pully. After that I could remove the belts and tensioners.
Put the new tenstioners on. And then, using the instructions of my Alfa workshop manual, put the new belts on:
All the engine parts back on:
And (ignoring the missing rear decklid), done!:
It took be about 3 hours.