My TR's air conditioning compressor/pump went bad, or so I believe. To repair a gas tank I had to disconnect the AC. Since I don't mind hot weather I never got around to recharging the system....but I did hook everything back up. After a couple of weeks the compressor starts making a clattering sound like a bad lifter. I removed the compressor to take it to get checked out and repaired. But again I've procrastinated since having AC isn't crucial for me. The time has finally arrived to where I need to get the pump checked out. It is a Sanden unit I think, my car is a 1987 TR. Does anyone have an approximate idea what I can expect to pay for a rebuild of this pump? I assume it went bad because I ran the car without a charge in the AC system and the pump starved for lubrication?