Mercedes 420SEL W126 - R12 air con regas

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Sat 29 May 2010 11:01
Mercedes 420SEL W126 - R12 air con regas - mej

Is there a cost effective work around to regas a R12 system now that this substance appears to be outlawed? I have varying responses from garages, air con specialists and the net. The answers seem to depend more on what product they offer than my best interests. Answers vary from new seals, evaporator, condenser, hoses, compressor, to (net) 'just put R134a in and accept more frequent regassing'.

Any factual info appreciated.

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Sat 29 May 2010 21:03
Mercedes 420SEL W126 - R12 air con regas - elekie&a/c doctor

I have converted many old cars,including Mercs,to 134a.The best option is to replace the filter/drier unit and charge the system with around 10% less 134 than R12.It is also important to use a pao universal oil in the system that is compatible with the existing mineral oil.Lastly the cooling system needs to be in good order because the a/c system with 134a runs at slightly higher pressure.So make sure the viscous engine driven fan is ok and the auxilliary electric cooling fan is working ok.hth

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