I actually popped onto here to ask another question but I saw this thread and thought i'd respond as i'm about to do the same thing.
I'm currently in the process of bringing a pair of TSIO360's back into service after being stood for about 10 years. The aircraft they're off needs to go for an airworthiness inspection so I had to get formal advice from an Airworthiness Surveyor and also Continental.
Basically I agreed the following (which seems like common sense to me)
- Remove each cylinder & piston.
- Inspect, very lightly hone and re-seat the valves
- Clean up the pistons with fresh rings
- Inspect the lifters and cam for corrosion. Service Information Directive SID-051B has all the information required for continental engines re acceptable levels of cam and lifter corrosion.
- Reassemble with fresh gaskets and o-rings.
- Remove and reseal the sump + clean out any debris & change all filters, plugs, leads etc
- Replace any flexible hose.
Then a 500h inspection on all other engine items including the mags.
- pre-oil as per M-0 manual prior to start.
- Run it up to temperature. Change the oil and screens
- Fast taxi and full power runs. Change the oil and screens/cut the filters.
This of course assumes the engine is otherwise free turning.