AC blow warm - should I convert to R134?
03-13-2015, 02:26 PM
#1
AC blow warm - should I convert to R134?
My car is a 1988 924 S and the summer is coming and i would love some cold a/c. Has anybody done this conversion successfully? Any tips would be greatly appreciated.
03-15-2015, 08:23 PM
#3
Proprietoristicly Refined
Rennlist Member
Rennlist Member
Comment on the "easy job".
I converted my '87 924S to R134a in 2009.
I bought a professional rebuilt compressor, new receiver dryer, and seal kit.
I flushed all the lines and the condenser (old oil and dirt collects at the bottom of the condenser-reverse flush).
Bought a Harbor Freight electric Vacuum Pump.
Vacuumed for about 90+ minutes and vacuum held.
Installed 24 OZ of R134a and proper oil. (Sams Club sells a R134a case of 12 in PHX for $50 + tax).
A few weeks later the AC was empty. Removal of entire blower/AC housing under dash was required. Located the leak in the evaporator coils-replaced evaporator. Resealed every O ring in the under dash blower, evaporator, expansion valve and hose. Vacuumed and refilled with R134a.
As Griffiths mentioned it is an "easy job" if you have some skills or a pocket of cash for the shop.
You will not get the same cooling you had with R12. R134a works in Phoenix because it is a "dry heat". In areas of high humidity, to get the best cooling with R134a get an improved high performance condenser.
Griffiths sells one.
http://griffiths.com/porsche/air-con...ac-condensers/
AC with R134a has worked fine for over 5 years in the '87.
GL
J_AZ
I converted my '87 924S to R134a in 2009.
I bought a professional rebuilt compressor, new receiver dryer, and seal kit.
I flushed all the lines and the condenser (old oil and dirt collects at the bottom of the condenser-reverse flush).
Bought a Harbor Freight electric Vacuum Pump.
Vacuumed for about 90+ minutes and vacuum held.
Installed 24 OZ of R134a and proper oil. (Sams Club sells a R134a case of 12 in PHX for $50 + tax).
A few weeks later the AC was empty. Removal of entire blower/AC housing under dash was required. Located the leak in the evaporator coils-replaced evaporator. Resealed every O ring in the under dash blower, evaporator, expansion valve and hose. Vacuumed and refilled with R134a.
As Griffiths mentioned it is an "easy job" if you have some skills or a pocket of cash for the shop.
You will not get the same cooling you had with R12. R134a works in Phoenix because it is a "dry heat". In areas of high humidity, to get the best cooling with R134a get an improved high performance condenser.
Griffiths sells one.
http://griffiths.com/porsche/air-con...ac-condensers/
AC with R134a has worked fine for over 5 years in the '87.
GL
J_AZ
03-24-2015, 03:59 PM
#5
Rainman
Rennlist Member
Rennlist Member
i too did the "full conversion" including evaporator removal/flushings, all o-rings, new drier, and a spiffy aftermarket condenser.
the AC works very well until it gets into the high 90s-100s outside. there it still keeps you cooler but it does not get "cold".
the early 944/924 cars have poor airflow from the vents - if you have a passenger splitting the ac you wont be as comfortable as having both center vents aimed at you obviously, but it is passable.
its better than not having it.
the 944 needs more fan power and probably a larger evaporator/condenser pair to have better ac...i might have an idea in mind.
the AC works very well until it gets into the high 90s-100s outside. there it still keeps you cooler but it does not get "cold".
the early 944/924 cars have poor airflow from the vents - if you have a passenger splitting the ac you wont be as comfortable as having both center vents aimed at you obviously, but it is passable.
its better than not having it.
the 944 needs more fan power and probably a larger evaporator/condenser pair to have better ac...i might have an idea in mind.
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06-30-2015, 02:44 PM
#8
Proprietoristicly Refined
Rennlist Member
Rennlist Member
06-30-2015, 07:42 PM
#11
Proprietoristicly Refined
Rennlist Member
Rennlist Member
Some legitimate sellers want to see your EPA certificate or sign a waiver. I took the test and passed for my basic certificate.
http://www.epatest.com/
Info from:
http://the944.com/ac/default.htm
Pick up a R-12 2 OZ oil recharge can if you find it.
J_AZ
http://www.epatest.com/
Info from:
http://the944.com/ac/default.htm
Pick up a R-12 2 OZ oil recharge can if you find it.
J_AZ