DeTomaso Mailing List: March 98, Message #233
     



From: 	"Mike Drew" <mikeldrew@hotmail.com>

Subject: Re: R-12 -- R-134 Upgrade

Date: 	Thu, 5 Mar 1998 15:24:46 +0000



Chuck wrote:



	I have parts for A/C....in a box....



	Before I bother to install....



	What's necessary to upgrade ( upgrade ??? ) to R-134 ?



	What is required to change ?  and what might this cost ?



	What I have:  stock (fair shape) condenser

	                         the bottle with the inspection hole (?)

	                         Some kind of compressor

	                         Some brackets....



	                         No knowledge.



>>>The most important thing to know is that 25-year old hoses won't cut 

it.  The molecules in R-134 are much smaller than R-12, and will leak 

straight through old hoses.  New 'barrier' hoses will work for either 

type.



Again, when R-134 was new, all the trogs (including me) were being told 

and believed that you had to change the entire system from top to bottom 

or nothing would work; however now it appears that all you need to 

change is the hoses, and install a rotary compressor.  Old seals won't 

cut it, but if you've got new components ready to install, you're 

basically there already.



Talk to the vendors and see what they have to say.



Mike



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