AIr conditioner Refrigerant

lol, but designed the ecu to cut out instead!

[mettersl]

Touch whatever but so far I hevn't experienced that problem, but have witnessed it first had on a CAR run......
Lee

This topic regularly rears its head on the DeLorean forums too, so here goes.

R12 is thoroughly illegal as a ozone-depleting CFC. Modern cars use R134a but this runs at a higher pressure, and a lot of places will try and sell you a conversion from R12 to R134a. A lot of the yanks are doing this on their DeLoreans and there's an excellent write-up here, and I believe Renault used the same AC compressors for years - the DeLorean's one is Renault sourced

http://www.dmcnews.com/Techsection/r134.html

HOWEVER the reason so many poeple stateside are converting is because R12, though legal, is extortionately expensive, and bizarrely, the drop-in R12 replacements are illegal! Not so over here. The problem you get is an AC place will try and sell you a conversion than simply re-fill with replacement because they have to buy a big bottle of it and won't make anything like as much money. As you can see from the above article, it's nowhere near as simple as just dumping out the old gas, running a "conversion oil" through it, and re-filling.

So.... my barometer for AC places is to ring up and ask "do you do drop-in R12 replacement" and if they say no - get it converted, go use someone else!!! There're a lot of different brands out there for basically the same thing -

R413
R416
RS24
Isceon 49

All of these have been shown to work in the DeLorean's R12 system and a vac, leak check and re-gas typically costs £50-75. They are all perfectly legal and will combine with any residual R12 in the system with no problems.

R12a is largely butane!!!! so yes, slightly flammable, and available in the US usually as a dodgy mexican import. Here the EU has stricter controls.

Right-so............ thats cleared that up then

No problem for most of us........ no AC and so less to maintain.

R12a is largely butane!!!! so yes, slightly flammable, .

Not the case, but all the hyrdocarbons are, usually R600A, is Iso Butane, flammable yes but only under special/unlikely circumstances and you probably have it in you kitchen! look at your fridge/freezers rating plate.
The problem with the R12 so called, drop in's, is miscibility ie. how it reacts with the oil in the compressor..In theory R600 does not have a problem running in oil used in R12 systems but the charge must be far less (approx 1/3rd).
there may be some legislation about the use of hydrocarbons in car systems, i dont know, only do the stuff in you kitchens myself!

As Stunned Monkey says and I pointed out in my earlier posting, the solution is a good drop in gas. The available and proven one is Isceon 49 (R413). It works just like R12, has no oil compatibility problems, is non ozone depleting and proven long term reliable and efficient. It requires no conversion of any sort. It is also legal and safe. Road Speed are now using it in A610s including mine. They are on 01453 750864.

[stephendell]

Isceon 49 or RS-24 are the best drop in replacements. Of these two RS24 is slightly closer in terms of properties to R12. Not a lot in it though.

Our local guy told me that R413 is meant for industrial applications, not cars, and R416 is specified for old car systems. Didn't notice the difference personally and both worked for a year in my DeLorean. Leak test next time!