Quote:
Originally Posted by Graham
Sorry to go off-subject, so will keep it short!
Duracool? That or equivalents are being used more and more here in Canada, because they are not subject to the crazy rules regarding flurocarbon refrigerants.
On my 300D, the A/C gave up for about the 3rd time several years ago. I asked our best local auto A/C shop what they would suggest. They said best bet for the old car was to use a HC refrigerant so that leaks, if they occurred, would not be subject to the "rules" and system would run at lower pressure than the R134a which is the only alternative here.
I understand the downside, so no need to go there  |
Thanks for being honest about why they are being used... NOT because they are the best refrigerant for your system... but to avoid the ' crazy rules' imposed by Canada....
For OTHERS......stop reading Graham.... since the differences are subtle... Duracool is a blend.. so any leak.... and your system HAS a DESIGNED IN leak to keep the AC compressor front seal LUBED.... leaks not as a unit... but the lighter smaller molecules leak first... so the MIX of several refrigerants immediately starts being something different... SO you can not just ' top off' as the refrigerant level goes down... a complete evacuation and refill is necessary...
Many times a shop will base ' best bet ' for suggestions on things like whether they have the machines to deal with something....
So R134a IS available for you to use while following the law... interesting..
In addition to the question of flammability which causes HC to be illegal in 19 states in the US....
The fact that your AC kept giving up... something not really investigated as to cause.... leaves a lot of questions open... which may not be being addressed by the refrigerant you are using...
for anyone with an R4 compressor.... OIL MISSIBILITY ... the ability of the particular oil IN THE SYSTEM ... to be carried around IN THE REFRIGERANT..... is very important because the R4 had NO OIL SUMP.. all the lube must be supplied by the refrigerant traveling around the system...