Thanks Big Bill. There seems to be lots to consider. The mech. recomended
to replace the compressor, but didn't have a convencing justification.
There reason to replace the compressor is to achieve more cooling when the
engine is idle or at very low speed like in trafic jams. I just find the AC
is comletely not efficient. It doesn't blow cold-enough air to keep the
compartment reasonably cold.