I just received a 1991 NSX engine with under 15,000 that I bought up North and as you can see in the picture, the outside is heavily rusted. I took the engine to my mechanic and he told me that there is a strong posibility that at least one of the cylinders is rusted from moisture getting in to the cylinder from an open exhaust valve.This engine was not prepared for storage, and one of the Catalitic converters was removed some time ago. My mechanic things that the engine is probably frozen and he does'nt want to turn it because he things that turnning it will only cause more damage to the engine. What do you guys think ??