In Reply to: What???? posted by RL on July 07, 1999 at 11:45:56:
1) Rumor has it that Dupont developed the concept of using Hydrogen Fluoride in a halogenated hydrocarbon refigerant application almost 40 years ago, then filed as produciton became feasible. For many years they held the exclusive patent on Freon. After two extensions, the third was refused. Soon many companies came online with major CFC production capacity. Less than 10 years later....guess who was lobbying to outlaw CFC refrigorants? Read the regulations. They were so slanted to HF containing refrigerants that later ammendments were included to define 'allowable non-ozone depleting second generation replacements for R12.' But, by this time R134 had certainly become the industry standard.
Why? It's cooling capacity is terrible. It's highly carcinogenic. Corporate America?
2) The idea that R134 is better for the enivironment is a myth. Now, it does not contain ozone depleting CFC's like R12....but by that argument, neither did the Valdez oil spill. R134 contains HF, which is pretty nasty stuff. The truth is, they're the both significantly bad for the environment. But in perspective, who cares? If you look at the fact that simply starting your car pumps out more environmently detrimental polution than your 3lb CFC toting compressor could ever hope to do, the whole thing seems pretty trivial. Who cares about the ozone layer or tumored coated testicles when were baking,frying, and choking to death in a low laying atmosphere of CO, CO2, and Nox. Why don't we ban gasoline? That's the culprit.
: Wasn't the reason to going to R134 to protect the environment? I thought R134 was more environment safe.
: : Replacing the condensor is something you can do yourself. Charging the system is likely not. It requires a vacuum pump and some manifold guages.
: : Your 91 still uses freon. I had my system (90 525i) completely drained and recharged for $75 at an air conditioner specialty shop. Don't go to a dealer...they will certainly try to capitalize on the US Freon Scam.
: : And, do not convert you car to R134. It doesn't cool as well...it does do significantly more damage to your local environment...(just not the ozone layer), it causes testicular cancer in low exposures, and since Dupont's patent has run out, it will likely be surpassed by a better refrigerant in the near future.
: : I would replace the condensor myself, then take it to a local cool shop to have it pressure tested and charged. I'd expect to pay $75 to $150.
: : : : I have a 91 525i that is in need of a new air condenser. I bought a new after-market one from a company out of the Roundel. It looks like a fairly simple project to install.
: : : : My question is how hard is it to install? Can an amateur do it in an afternoon? The local dealership can charge the system. They gave me a price of $370.00 to install and charge the new one, is that a fair price?
: : : : Thanks in advance,
: : : : Scott
: : : : 525i Sharked
: : : : BMWCCA
: : : ... To save money have a non dealer shop that does airconditioning work do the job. AC work rquires special tools, and skills.
: : : Will