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Actually, let me ask another question. I was thinking of doing all my lines in hard line, but a friend of mine says I should go with hose because it has better insulating qualities. Any thoughts from anyone?



I'd stick with the hardline throughout and hose to/from engine, just like factory did. Less likely to develop leaks and easier to find them if they do develop. If OP is concerned about heat infiltration on condensor outlet (where is passes through engine compartment) to evaporator, or on return line to compressor, you can always insulate the hardlines with slightly larger diameter hose of some sort. But most factories didn't, I'm guessing. Three cars here from different manufacturers (Dodge, Acura, Toyota) don't have those hardlines insulated.