I'm about to replace the ac compressor, condensor, and accumulator on my '91 240 and am looking for the proceedure for doing so. I have searched the archives for this but haven't found the same situation. Please forgive me if I'm duplicating but I've never dug this deep into the ac system and wanted to make sure I'm doing it right.

I retrofitted the car last year for R-134 and replaced the original compressor with a used one. It ran most of the summer before the clutch went, so I've decided to flush the lines and replace all the components but the evaporator. I'm looking for the type of oil I need to put back in the system with the new components. I'd also love to know which components take the oil and what amount goes into each.

I assume that since I've retrofitted to R-134, that even though the compressor (Zexel type TM 15-HD) is new from fcpgroton and set up for R-134, that my car's lines are old and I need to drain the compressor and put ester oil in the system. Is this right?

I found a nice reference to the required oil amounts on the 700FAQ but the compressor numbers listed didn't match mine exactly and I didn't know if the amounts applied to my 240's different system.

Also, when I retrofitted last season, I had trouble draining and refilling my compressor and the new one has the same configuration. The instructions that came with the retrofit kit didn't cover this specific compressor, which has two ports for the lines to the system on top, and two nuts on the back, the lowest of which I assume is the drain. Do you drain and fill through that hole or is there another way? Is the other nut a fill port?

Any other advice or help you can give would be greatly appreciated.

Steve Benne