I pulled the engine from my '95 Roadmaster wagon so I thought I'd take the time to replace my confirmed to be leaking compressor. It was a new unit that was installed by the seller just before I bought the car and the system seemed to work fine other than needing a can of 134 after the last 2 winters. After pulling the hoses apart I noticed the orifice tube was pretty clogged up. I'd have to say the shop that replaced the compressor either never replaced it or never cleaned out the system very well or at all. Not to mention they never bolted on the rear support bracket for the compressor which it seems may have kept the compressor from leaking in the first place. So I've pulled all the hoses and the condenser and I'm going to clean them. I'll also clean the evaporator while it is in the firewall. The new compressor comes precharged with 3 oz. of PAG 46 oil. The system needs a total of 8 oz. and I have a bottle of the oil so I need to add 5 oz. Here's the question. Where do I add the oil? I know when you remove a particular part from the system the factory manual recommends a particular amount to replace it so is that what I should do? Divide the 5 oz. up per the factory recommendation or is there a central location I can add it to? Also what hole would I add it to the receiver/dryer? http://www.rockauto.com/en/moreinfo.php?pk=814871&cc=1022184&jsn=409 Or would I be better off just buying some of the PAG 46 oil that is added to a small amount of R134 and just add it to the system after I've evacuated it and while it is being charged? I'll probably need a couple of cans of that PAG 46/R134 mix. If I add the oil before hand out of the bottle when I'm applying a vacuum later it won't be sucked out will it? I have a new orifice tube and receiver/dryer waiting to go in once everything is cleaned.
