[W126 Coupe] Air conditioning Issues

[Doug Gavin]

Bill Reford wrote:

>Hi Group,
>
>I'm up here in Canada (Toronto) where we get only a few days a year above 95
>degrees, but many between 80-90 with lots of humidity.
>
>I changed from R12 to 134A 5 years ago on my 1985 500 SEC Euro with good
>success.
>
>I had to evacuate and recharge the system this year (5 years later) because,
>as it was explained to me, "the molecules in 134A are much smaller than
>R12", therefore over time the Freon has to be replaced as it will leak very
>slowly out of the system. My system has been checked for leaks using a dye,
>and none were found.
>
>The system now blows ice cold.
>
>Also, the sealers (additives) that are on the market cause more problems
>than they solve, as per MB Canada.
>
>Bill.
>----- Original Message ----- 
>From: "Iain Gunn" <igunn at bmts.com>
>To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
>Sent: Saturday, August 12, 2006 2:59 PM
>Subject: Re: [W126 Coupe] Air conditioning Issues
>
>
>  
>
>>I have been using Duracool for about 4 years now and have no complaints, I
>>have also filled probably 2 dozen a/c systems with it in that same time
>>    
>>
>with
>  
>
>>no complaints. My 86 560 SEL was converted to 134 when B4 bought it and
>>    
>>
>has
>  
>
>>worked fine for the last 5 years. Surprisingly I have never had to mess
>>    
>>
>with
>  
>
>>it. My 90 190E 2.6, I topped up this year with Duracool, works fine. The
>>    
>>
>86
>  
>
>>560 SEC Koineg was converted to Duracool. and worked fine for the 3 years
>>    
>>
>I
>  
>
>>had the car B4 I sold it.
>>Duracool Does NOT contain any 134.
>>                                                                Cheers,
>>    
>>
>Iain
>  
>
>> Some thoughts on the MB AC Freon issues that I thought I'd pass along.
>>    
>>
>>>Just yesterday, I stopped to discuss the seemingly long waiting period
>>>      
>>>
>for
>  
>
>>>my '90 SEC to cool down at 95 to 98 degrees ambient outside temp.with an
>>>A.C. specialist that works on my classic American cars very
>>>satisfactorily.  My system is fine, he says it just takes a little
>>>      
>>>
>longer
>  
>
>>>in these hot days and I need to be patient especially when the humidity
>>>      
>>>
>is
>  
>
>>>high but what he did point out very strongly was "Do not change this
>>>      
>>>
>R-12
>  
>
>>>Freon to R-134 or Freeze 12.(Freeze 12 contains 80% 134) Suck up the
>>>      
>>>
>cost
>  
>
>>>of R-12 @$40 a pound". He suggested that I find R 12 at swap meets and
>>>stock pile it if I'm going to keep the SEC
>>>
>>>He told me that he has changed the products at the request of  mid '80s
>>>      
>>>
>to
>  
>
>>>early '90s MB owners (under protest) and to a person, they have come
>>>      
>>>
>back
>  
>
>>>dissatisfied with the cooling capabilities of their cars.  He has
>>>converted my '64 Impala SS and my '71 442 convertible to R134 and they
>>>work fine and he agrees that  they should but the MBs just don't react
>>>      
>>>
>the
>  
>
>>>same. He does not have an explanation why . If others have made the
>>>      
>>>
>change
>  
>
>>>successfully, I'd be interested as a general education point in the
>>>      
>>>
>event
>  
>
>>>I need to consider this in spite Neils advice.
>>>
>>>Doug
>>>The MB Coupes Website!
>>>W126 SEC Mailing List
>>>Postings remain property of MB Coupes, L.L.C.
>>>
>>>
>>>
>>>-- 
>>>No virus found in this incoming message.
>>>Checked by AVG Free Edition.
>>>Version: 7.1.405 / Virus Database: 268.10.9/417 - Release Date:
>>>      
>>>
>8/11/2006
>  
>
>>>Hi Bill, That's encouraging news about the conversion to the 134A. The future of cool air in my 560 in Houston may not be so threatened after all.
>>>      
>>>
>>The MB Coupes Website!
>>W126 SEC Mailing List
>>Postings remain property of MB Coupes, L.L.C.
>>
>>
>>-- 
>>No virus found in this incoming message.
>>Checked by AVG Free Edition.
>>Version: 7.1.405 / Virus Database: 268.10.9/416 - Release Date: 10/08/2006
>>
>>
>>    
>>
>
>The MB Coupes Website!
>W126 SEC Mailing List
>Postings remain property of MB Coupes, L.L.C.
>
>  
>