Hello - have a 94 916 Strada, bought 6 years ago when the dealer put new belts on had about 13,500 miles - now at 17,000 miles I replaced the belts, and then thought I'd check the valve clearances. I assumed that the valves would have been done by the dealer and would not need doing for another 6000 miles - have just checked the vertical cylinder and the closers are too tight - not got round to doing the Horizontal one yet but if that needs attention then would mean working on the exhaust rockers/valves upside down - is this possible OR is it easier to go the whole hog and drop the engine out?