A/C conversion 1982 380SL

Has anyone had experience in converting a 380SL to the new Freon? What should I expect from a shop and what kind of costs? Thanks

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
'82 300SD just done last month. About $300 (including dye and evac and all the other little things that get tacked on). Just charging the old system with freon would have been about $250.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Don't do it. New freon is much less efficient in heat transfer and the SL's system is already marginal. It short, you won't get enough cold air to do yourself any good in hot weather. A good, tight R12 system is far superior in cold air output.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Be sure the mechanic replaces the freon pressure switches. I suspect many people who didn't get adequate cooling after conversion might be trying to run R-134 within R-12 vapor pressures--not a very efficient way to go. Also check all compressor seals and the low side suction hose for leaks. However if your system isn't leaking, then I'd just add R-12 until it becomes necessary to convert.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
The "New Freon" is not freon at all but a refrigerant called 134A. It is sold at all Wall Mart stores! Converting requires the replacing of the receiver/dryer, standard procedure. Any good service station can do the conversion. Find one who injects fluorescein into the system. It will reveal the exact source of a leak when exposed to UV light. To convert is not voodoo, but removing the contaminants from the system, installing the 134A, changing the screw-on caps for both ends with ones that indicate the new refrigerant. It will cost less if you source the new receiver/dryer from Rusty at 800-741-5252. He discounts all MB parts and is the official parts supplier for mbz.org. My conversion costs under $100. P.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.