Hi Tom, The companies that sell the Sanden compressors list a different one for R-134 & R-12. I don't know if the difference is more than just the fittings and oil. You might want to call the place you got it from and ask. 300ly, Don Verity ----- Original Message ----- From: tdcox@xxxxxxxxxxxxx To: Chrysler300@xxxxxxxxxxxxxxx Sent: Sunday, January 06, 2008 6:13 AM Subject: [Chrysler300] a/c freon Hey Rob, Dan et. al. I installed a new rotary compressor on my 56 Imperial with 134A; I have front and rear A/C like Rob in a single loop. It does not cool well. Also, I have had to install two ugly (plastic) cooling fans in front of the condensor, I am told, because the R134 requires additional cooling to operate properly. Can I switch the freon in the new compressor to R-12 for improved cooling and also to remove the cooling fans? The original A/C on 56's did not have an auxiliary cooling fan and I would like to have that "look" and the extra cold air. Thoughts? Thanks. Tom Cox [Non-text portions of this message have been removed] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: mailto:Chrysler300-digest@xxxxxxxxxxxxxxx mailto:Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/