A/C Conversion

Post by **Jesda** » Sat May 10, 2003 1:59 pm

I am going to have the A/C recharged next week. But I need to know, does it hurt to have it retrofitted to R134? I was told by one shop that because of auto climate control, and pressure sensors, it may be bad for the A/C system.

Thanks-Jesda

Post by **911/Q45** » Sat May 10, 2003 1:59 pm

Do a search on R134 and you'll see why it's a bad thing.

Post by **natsoundup** » Sat May 10, 2003 1:59 pm

I use a product call Enviro-safe... they sell it for about 6 bucks a can...they also sell a leak sealer....

I have a very, very slow leak...need to do a can or two a year...90 Q 153k miles

Post by **AZhitman** » Sat May 10, 2003 1:59 pm

Might help if we knew more about your car, Jesda!

Welcome to NICO - Hope you enjoy your stay!

Post by **Jesda** » Sat May 10, 2003 1:59 pm

Oh. Duh! Its a 1992 Q45 with 169k.

Post by **Q45tech** » Sat May 10, 2003 1:59 pm

The main problem with EVEN properly done conversions is even after you have spent serious money to replace the compressor, the dryer, rewired the pressure sensors, and installed a different type condenser, the system STILL doesn't cool as well with R134a.

Sure R12 is $40-$50 per pound [need 2.4 pounds] vs a few dollars for R134a.

Spending $2,000 [on AC repairs] is to be expected on an old lux car when it goes over 120-150,000 miles.

Post by **PalmerWMD** » Sat May 10, 2003 1:59 pm

I have converted to 134a in my 91., with noticably less performance in cooling .Was going to convert back to R12 this summer (sadly now that car is no more:()Yes teh R134a is cheaper it would take years of leaks and refill to break even with a conversion.

As for teh cheapo conversion ($150-200), they just dont work no matter what teh Pep Boys man says (yes I speak from personal experience) :doh

Fred..

Post by **Q45tech** » Sat May 10, 2003 1:59 pm

"Spending $2,000 [on AC repairs] is to be expected on an old lux car when it goes over 120-150,000 miles."

BUT IT doesn't have to be as preventative maintenance on AC from day one can extend the time to failure out to beyond 200-230,000 miles.

My oem compressor and condenser made 230k but I changed the dryers multiple times and reoiled and flushed the system a few times...........cost maybe $600 to almost double the typical life.............you pay early, you pay now, or you pay later.

My evaporator is as built back in 1989........248k. So another $1,000 repair will occur sometime, hopefully never.

Post by **wamQ45** » Sat May 10, 2003 1:59 pm

I converted my 88 chevy pu to freeze12 and adjusted the pressure sensor to turn down the temp and it ended up being just as cold. However, I don't think that the Q has this adjustment.

Post by **wamQ45** » Sat May 10, 2003 1:59 pm

Oh....you can always get 608 or is it 609 certified, buy all of the tools....and DIY (please do not attempt this at home cetrification is cheap tools are not)

Post by **Q45tech** » Sat May 10, 2003 1:59 pm

"converted my 88 chevy pu to freeze12"......But one has to decide if he feels safe having a hydrocarbon like butane or propane inside their AC system.

Not a good idea if you smoke or have an accident.http://www.epa.gov/ozone/snap/....html

http://www.aircondition.com/ww....html

Post by **Jeff Williams** » Sat May 10, 2003 1:59 pm

My '94 Q has 134a in it. I keep it set at 72 degrees year-round. When I get in my '00 I30, I keep it set at 77 degrees. Both are 134a, and both pump out cold air, but I guess the difference is in the computer.

Prevention and service is the key.

A/C Conversion

A/C Conversion

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