celticwarlock
Active Member
Hello, all. My '69 NY originally came with an AutoTemp system which, of course, does not work as it should. I have no interest in repairing it, and I cannot convert the car to a conventional A/C system just yet (I have the parts, but not the time....lots of other large projects must come first). I am converting it to 134a. I have installed a manual flow valve under the hood to stop the flow of coolant into the heater core, which I hope will enable me to get cold air at the vents once modifications have been made. My system has enough R-12 in it to kick the compressor on, but not enough to blow cold air (one of the seals has a very slow leak), so it seems likely that the compressor works. It is my understanding that I must replace the receiver/dryer, all the o-rings (to the green ones), get as much mineral oil out of the system as I can, drain the compressor and refill it with ester oil, change the service ports, pull a vacuum on the system for an extended period, and refill it with 134a, but I have the following questions: How much oil is the compressor going to need? Does anyone have a link to the part of the FSM that gives instructions on how to fabricate a dipstick for the compressor? When the system is filled, will the compressor clutch cycle on and off, or is this system not designed that way? Also.....unless I find it necessary to replace them, I am using the lines I have on the car. Other systems I have converted successfully did not require this, but again, if they are marginal upon close inspection, they will be chucked.