STERLING STINGER Posted February 19, 2010 Share Posted February 19, 2010 on my 88, the air conditioning unit leaks freon from the bottom I'm thinking about getting 1 from the pnp tomorrow since their like 20 bucks... my questions are.... is there any special way to take them off or put them on? is there pressure in it that needs 2 be released? how do i know if i got a good one from the pnp? any vehicles that are newwer that i can use? they "seem" pretty basic, but ive thought that before and was wrong thanx dudes :banana: i know that ill appreciate the air in the summer, mowing all day....ya know??? Link to comment Share on other sites More sharing options...
mjeff87 Posted February 19, 2010 Share Posted February 19, 2010 I don't want to break your heart, but it's not quite as simple as it seems.... to open up the system (which apparently, yours is already open/leaking) you have to recover all of the refrigerant correctly, and legally. Once the system has been evacuated, you can remove the compressor. At this point you have introduced moisture into the system, so you need to replace the receiver/dryer, install the new pump with the correct amount of oil in it and the dryer, and pull a vaccuum on the entire system to ensure no leakage. Then recharge with the correct amount of refrigerant, using both low and high side pressure gauges. Sure, you can ghetto-fab a new compressor in, skipping most of the above, and not care about anything else, but we here at CC don't condone such things. Jeff Link to comment Share on other sites More sharing options...
james750 Posted February 20, 2010 Share Posted February 20, 2010 Legally, you need an A/C machine to evac the system legally, and you should have one to put the system under a vacuum to check for leaks after the new part is installed. And, although not required, it certainly makes it easier to recharge the system. This is especially important if you plan to continue to use R-12, which is around $100 bucks a pound. I would suggest doing the R-134a conversion why you are replacing the compressor. You also need to replace the pag oil that you are removing from the system by removing the compressor. Also, by A/C unit what do you mean? I am assuming compressor. But with the number of components that make up the ac system, I figured I should ask? Link to comment Share on other sites More sharing options...
Pete M Posted February 21, 2010 Share Posted February 21, 2010 the condenser on my 88 leaked when I bought it. eventually i got a replacement from JCW.com and found a coupon from a local business on a R-134 conversion. the coupon covered evacuation and recovery of the (non-existant) R-12 coolant and I just paid them a bit extra to install the new condenser. Convert to R-134 while you can! :thumbsup: it'll be cheaper down the line when the system springs another leak. Link to comment Share on other sites More sharing options...
jpdocdave Posted February 21, 2010 Share Posted February 21, 2010 i second whats been said, and i wouldn't waste my time taking one out of a pnp. most will be no good. Link to comment Share on other sites More sharing options...
STERLING STINGER Posted February 21, 2010 Author Share Posted February 21, 2010 i noticed that the 88 that ive been pulling parts from has a "bypass pulley" for the air I'm sure you know what it is a pulley on a clip that bolts in where the air compressor used to be I'm gonna get it when i go back there so with this now.....what do i have 2 do to just remove my ac? Link to comment Share on other sites More sharing options...
jpdocdave Posted February 21, 2010 Share Posted February 21, 2010 there's no reason to use that bypass unless your compressor seizes and you don't want to get another one. Link to comment Share on other sites More sharing options...
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