the techs do not want to do it because it is a headache, and they will most likely not be able to finish in half the time allowed by mitchells for the work. they want the gravy, easy stuff to be able to bill 20 hours for a job that they can do in 10. tell him that you do not care what he recommends, btu that you want your valves checked. you are looking ar some $$$ though. there are some parts to put it all back together (gaskets, seals, etc) and the shims are $9 each. i plan to do mine soon and already have all the gaskets and such. i will play musical chairs with teh shims and only buy what i need.