Join Date: Jan 2003
Location: Rapid City SD, Black Hills of South Dakota
Yea. If the compressor has disintegrated and shows any evidence of black death, the condenser is junk. You'll never be able to clean it. Even trying to drain it thoroughly of clean oil is difficult. Hopefully the filter in the receiver drier catches the burned aluminum particles and prevents the expansion valve and evaporator from being contaminated.
Regardless, I'd drain as much old mineral oil out of the system as possible. When we talk about "low" points in the system, there are low points all over. Condenser, R/D, Evaporator, etc, not just the compressor. I'd change the receiver drier anytime any type of conversion was done, even with a clean system.
Too much oil in the system degrades the efficiency and affects cooling.
I've used Envirosafe ES-12 in an old Jeep conversion, and it does work extremely well, is very inexpensive, works with mineral oil fine, and is basically a drop-in for R-12. And you do use much less of it than the original R-12 charge. Not all states approve it, however, and there is the ongoing questions about exactly how safe it is to use. For sure, you want the system to be sealed up well, especially inside the pax compartment.
Last edited by Roadtrip; 12-20-2012 at 05:30 AM.