Noisy AC Compressor

[ExoniX]

Well after a long 60 mile trip to my friends house yesterday at like 80-90 the whole way, When I got off the highway i heard some loud knocking noise.. I freaked out and thought my engine was pinging but it would go away in the higher rev's so i turned off the AC and it all went away.. I looked at the engine bay today and it looks like the compressor had spit out oil or something.. Well I guess i need to add some oil, Since it goes clank clank clank when the AC is on but it still works fine...

[DAEDALUS]

That's odd...if it's spitting oil it should be spitting freon too. How much oil was there? Was it coming from behind the pulley? The leaking oil is probably more a symptom than a cause. Galled bearing?

[ExoniX]

Yea its all coming from behind the pulley, guess its time for a new compressor huh ? As far as i know the freon is fine, and the whole compressor is filthy, Looks like its been doing it for a while now

[JNM240]

What type of refrigerant do you use? This is important to consider, since R12 is like $72 a pound (my 90 takes 2 pounds) and is not available in a lot of areas, while R134A is like $20 a pound. A/C work can get expensive fast. More than likely you will wind up retrofitting to R134A, replacing the reciever/dryer, as well as the compressor. Then you have to flush the R12 out before you charge it with R134A.

[ExoniX]

I will retrofit it... I know how expensive it can get, Had to replace lines, compressor AND evaporator in my old 92 celica was real cheap though, only wasted about 300 bucks on it