Originally Posted By: JHZR2
Since the system has been opened, substantial work must be done anyway. Id get solvent, do a flush, possibly replace the condenser or at least try to flush it, definitely put in a new receiver dryer, add the OE amount of oil in the dryer and compressor, seal up with new O-rings anywhere I could, and then fill with Nitrogen and R22 or an equivalent refrigerant suitable for sniffing. Overpressurize it and leak check, when youre OK with that, pull it to 500 micron of vacuum for 30-90 minutes (longer is better) and then fill with the right mass of 134 per the OEM setup.
Good to go.
If you flush with solvent you had better be very sure you get all of it out or it will ruin a compressor. It takes a lot longer than you think to blow out components that you flush out with solvent, even the types of solvent that are supposed to evaporate. Also, most newer style condensors are not easily flushable and are better off replaced. Most car manufacturers don't recommend flushing when doing AC repairs. If the compressor fails, most recommend replacing the components instead.
As far as the condition of the his OT, it was not that bad. I have seen some that are a lot worse. I have seen plenty of OT's with a few small pieces of metal shavings on it that have never had a compressor failure. My 98 K1500 that I bought new and only had a leaking compressor was like this.
He said this was his beater car and is why I suggested replacing the OT, the valve, evacuate and recharge. Of coarse he may have a high pressure situation causing the valve to blow which will require more repairs.
Wayne
Since the system has been opened, substantial work must be done anyway. Id get solvent, do a flush, possibly replace the condenser or at least try to flush it, definitely put in a new receiver dryer, add the OE amount of oil in the dryer and compressor, seal up with new O-rings anywhere I could, and then fill with Nitrogen and R22 or an equivalent refrigerant suitable for sniffing. Overpressurize it and leak check, when youre OK with that, pull it to 500 micron of vacuum for 30-90 minutes (longer is better) and then fill with the right mass of 134 per the OEM setup.
Good to go.
If you flush with solvent you had better be very sure you get all of it out or it will ruin a compressor. It takes a lot longer than you think to blow out components that you flush out with solvent, even the types of solvent that are supposed to evaporate. Also, most newer style condensors are not easily flushable and are better off replaced. Most car manufacturers don't recommend flushing when doing AC repairs. If the compressor fails, most recommend replacing the components instead.
As far as the condition of the his OT, it was not that bad. I have seen some that are a lot worse. I have seen plenty of OT's with a few small pieces of metal shavings on it that have never had a compressor failure. My 98 K1500 that I bought new and only had a leaking compressor was like this.
He said this was his beater car and is why I suggested replacing the OT, the valve, evacuate and recharge. Of coarse he may have a high pressure situation causing the valve to blow which will require more repairs.
Wayne
