I'm getting ready to do this on my W116 300SD as the AC compressor went bad earlier this year.
My plans are: 1. Remove compressor, expansion valve, and receiver/dryer and flush the lines, condenser, and evaporator with AC flush solvent. 2. Install new compressor, expansion valve and R/D. 3. Replace any other o-rings that might have been missed in step 2. 4. Evacuate and charge with R12. I just did this on my '67 300SEL (which hasn't had AC working since the 1980s), but I didn't change the compressor, only changed the oil. It'll blow air below freezing. A few things to consider. R12, with the right license you can get easily online, is about ~$35 for a 12-14oz can on ebay. Overall, very affordable. You need a vacuum pump and R12 gauge set. (You can use a R-410 gauge set also, which more options might be available for). In terms of the compressor, I'll be using a genuine MB R4, which isn't cheap. But I don't plan to do this again for the next 10-20 years. But there are cheaper options. I honestly don't see the point in going any other route. Sanden compressors and alternate refrigerants are just solutions in search of a problem. The original systems work well and still fully serviceable. You can convert to R134a if you want, my W116 has been running it for the last 10 years before the compressor died. It cooled just fine, but I don't see the point in the added pressures and heat when R12 is still available. Jaime On Thu, Jul 18, 2019 at 1:04 PM Allan Streib via Mercedes < mercedes@okiebenz.com> wrote: > I am wanting to get my AC going in my W116 300SD. Has not worked since I > got it. From what I can tell, the compressor is totally siezed, and I > have the belt removed. > > These are an "upside down" GM compressor is that right? Are there > better options e.g. Sanden or something else? > > What else should I think about. I have a vacuum pump and a gauge set but > beyond vacuuming/charging I have not done any other work on AC systems. > > Allan > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > -- Jaime Kopchinski http://www.jaimekop.com/ _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
