1JZs and 2JZ compressors shit themselves all the time.
i had to replace one on a mates JZX83 when i did the conversion. its now shit itself again, 2 years later.
there are a few different variants of the 1JZ compressor. you can however change over the pulley assembly and also the compressor manifold to suit your lines.
they need to be immaculate inside if your going to put a 2nd hand one in. any particulates will see it fail in no time.
further to this story, ive redone the entire system in my celsior (similar setup and vintage). the last compressor come to a grinding halt (literally) so it sent metal particulates through the entire system.
the only way to ensure it will last when you recommission it is to remove every single AC component in the car and flush it with compressed air and shellite. i would also recommend replacing the expansion valve. the condensor and evap will also need a good clean externally for air flow reasons.
the compressor needs to be drained of oil and topped up with something like PAG (castrol oil).
in my case with the celsior, a genuine compressor wasnt an option at $700 trade. some places can rebuild them but i would start with something better if your going to take that route. yours has prob had irreversible damage.
anyway there is my thoughts
Edited by 2JZZ12, 14 February 2010 - 08:54 PM.