The Mitsubishi Pajero Owners Club®

gonzo · *** Joined: 20 Sep 2004 Posts: 231 Location: Cheltenham

Hi guys,

I have the old R12 systrem (I think) and I want to get one of those "drop in" refills.

I have been recommended to get R24 as refill, but the guys I spoke to at the aircon refill place said that I would be better off going for a commerical ICM49 gas ( I think it was ICM or ISM or something like that), as the propane content of the ICM is less than the content in R24 and thus would be safer.

He mentioned that there is a slight over pressure difference to be dealt with, but it can be compensated for by filling less into the system

Has anybody got any comments/ help? I have never heard of the ICM gas.

Any help much appriciated, as I cant seem to find a fitter with R24 gas and the summer is getting hotter.

Thanks

Gonzo

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more x 4 · Posted: Sat May 28, 2005 15:38 Post subject:

pm airconman,he'll tell you whats what Wink

monday · * Joined: 20 May 2005 Posts: 48

There is a good chance you system uses the old R12. I hear its hard to get down there. Due to the scarcity of this gas, your guy is recommending putting in the more ozone friendly R135. Yes there is a pressure issue because the new gas works at a higher pressure. It’s not recommended to just switch from R12 to R135 (or was that R134??). some fittings WILL have to be replaced.

The compressor is another issue.
The shaft seal of the old R12 systems will not stand up to the higher pressure needed by the new gas. It will work, there is no doubt, but the gas will slowly leak out the shaft. Some say the compressor will blow up completely (not true). You can under fill the system to compensate for the pressure, but you wouldn’t be happy with the results.

Personally, I prefer to use the R12 (although not available anymore in some countries). It cools faster and can keep you cool even when driving high noon. I have a car that uses the new gas. Its ok, but just cant keep the cabin cool when the sun is up.

Sam-F · *** Joined: 30 Apr 2005 Posts: 177 Location: Glasgow

I do vehicle aircon & electronics for a living and would not use anything other then R24 for a drop in as it was developed as a replacement to R12
you may find some one in your area at http://www.instvac.co.uk/

gonzo · *** Joined: 20 Sep 2004 Posts: 231 Location: Cheltenham

will see if I can get R24 then instead of this icm49

Thanks for the advice,

Gonzo