I did not evacuate and flush the compressor of the r12 oil. The instructions from the conversion kit did not call for that.
My friend converted his 300SD from R12 to R134a last year. He did not evacuate and flush the system, nor did he replaced any o-rings and the dryer/receiver. His A/C system still running good.

When you go to a shop asking for R12 to R134a conversion, they definitely tell you that: you need to evacuate and flush the whole system, you need to replace the o-rings, you need to replace the dryer/receiver. Otherwise they cannot justify to charge you a lot of $$$ for just put in one service pot , 3 cans of R134a and 1 can of POE oil.


David


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1985 300D Turbo