Camshaft / tappet advice required
Newbie here wanting some advice please.
I'm handy with the spanners and have worked on most marques so will be doing all the work on my new alfa myself, although with a new manufacturer its best to ask the people who know them inside out before i make mistakes and spend money on the wrong parts.
Bought an 08 147 ts sport with noisy top end, easy i thought new variator and cam belt kit, job done, ha!
Got the car home and before i flushed the oil i checked the dipstick, no oil showing whatsoever! had to add 1.5 litres just to get it showing on the dip stick!
added another litre of oil and a flush then ran it for 15 minutes before draining the oil.
Ordered my timing belt kit and variator last night and stripped it today only to find it needs 2 camshafts.
Both cams are in perfect condition apart from the 3rd lobe on the inlet and the 5th lobe on the exhaust that are completely worn away!
Now my questions
1, How do only 2 out of 16 lobes wear? i assume sticking tappets?
2, Whats the best place to get some new cams?
3, Has anyone fitted second hand cams to their head with positive or negative outcome
4, Are there differences in the tappets through the years, I've been pricing some but they all state 96-01, 00-06, 97-04 nothing that states -08?
Many thanks in advance.