[DML] Re: freeze 12

["therealdmcvegas" <dmcvegas@xxxxxxx>]

The first thing to do is to find out why your Air Conditioning system 
has lost it's cooling capacity. It could be a clogged Orifice Tube, a 
bad Accumulator, or even a Refrigerant leak from a connection, or 
even thru the hoses themselves.

I don't know if $200 is a good price to punch 3 hoses that are 
reusing your couplings from the old hoses (I too plan on doing this 
in a couple of months), but I can tell you that 3 hoses for that 
price is certainly more economical than 1 for $130 for a 20 year old 
one!

Make sure that when you have these new hoses punched for your car 
that you use Barrier Hose. Barrier Hose is designed to not only take 
high pressures, but it comes with a Neoprene lining to keep R-134a, 
and all other non CFC Refrigerants from seeping out thru the hoses 
over time. Which make no mistake, they will.

As for Freeze 12, or any other substitutes, your best bet in making a 
choice is to reference the EPA's data.

http://www.epa.gov/ozone/snap/refrigerants/macssubs.html

Freeze 12 contains no CFC's, and that's because it substitutes HCFC's 
instead! So if you like R-134a, I'd probably just suggest sticking 
with that, since Freeze 12 is already 80% R-134a anyways (assuming 
that enviornmental concerns are what have motivated you). What the 
actual perfomance gains with Freeze 12 vs R-134a are, I've no idea, 
as I've never seen any claims that it cools any better, or improves 
component life. But R-134a appears to be much cheaper from what I've 
seen $9 for one can of Freeze 12, vs $19.99 for 3 cans of R-134a.

If you need additional cooling capacity with a replacement 
refrigerant in your car, you may also wish to consider the use of a 
Variable Orifice Valve that can increase cooling capacity at idle.

http://www.acsource.com/subcatmfgprod.asp?0=273&1=274&2=-1

Myself, I am going to be performing a complete A/C rebuild this 
spring, and will be installing a VOV. However, I am seriously 
considering a Hydrocarbon refrigerant substitute due to my extreme 
climate.

-Robert
vin 6585 "X"




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