Outer Limits 4x4 Board

BTW if you replace one gas with another ie swap R134a with R22 you will also need to replace all the oil seals and lines as well. Too much hassle, just make sure everything is clean and you've got the right gas charge in it.

DirtyPaj wrote:BTW if you replace one gas with another ie swap R134a with R22 you will also need to replace all the oil seals and lines as well. Too much hassle, just make sure everything is clean and you've got the right gas charge in it.

no point in swapping from r134a to r22,totally diff gasses,you would only swap r22 with sp34e.or r12 for r134a and if you change the seperator you can go from r12 to sp34e.
you wont need to change the lines just seals and seperator..

Mine was converted from R12 to R134a. Parts changed were: oil , O ring seals on the fittings that were disassembled to do the work, reciever drier and expansion valve (only because it was stuffed anyway!)

It's been running fine for the last 18mths like that.

murcod wrote:Mine was converted from R12 to R134a. Parts changed were: oil , O ring seals on the fittings that were disassembled to do the work, reciever drier and expansion valve (only because it was stuffed anyway!)

It's been running fine for the last 18mths like that.

they don't change oil that is in the gas..r134a is a mineral oil based gas...

suzy wrote:

murcod wrote:Mine was converted from R12 to R134a. Parts changed were: oil , O ring seals on the fittings that were disassembled to do the work, reciever drier and expansion valve (only because it was stuffed anyway!)

It's been running fine for the last 18mths like that.

they don't change oil that is in the gas..r134a is a mineral oil based gas...

Suzy, if i read what your writing correctly, are you saying the oil is in the gas or what, i may be mixing up what you typed,

but i am in the industry and would like you to clarify this before i go critisising.............

ozy1 wrote:

suzy wrote:

murcod wrote:Mine was converted from R12 to R134a. Parts changed were: oil , O ring seals on the fittings that were disassembled to do the work, reciever drier and expansion valve (only because it was stuffed anyway!)

It's been running fine for the last 18mths like that.

they don't change oil that is in the gas..r134a is a mineral oil based gas...

Suzy, if i read what your writing correctly, are you saying the oil is in the gas or what, i may be mixing up what you typed,

but i am in the industry and would like you to clarify this before i go critisising.............

i mean that the oil isn't a seperate thing like in a house old fridge,i havn't done much with cars so i if i'm wrong i don't mind ppl critisising,but don't car air con oil travel in the gas?..to a point..

no mater what sort of refrigeration or air conditioning, all oil is a seperate item to the gass, and in all forms there is an amount of oil that travels throughout the refrigeration system, as oil particles get picked up and pumped through with the refrigerant,

automotive AC is hardle any different to house hold AC, the general system is near tyhe same, with a few minor differences,

Well, the oil is separate to the gas in mine (and I assume all cars are the same!)

The old oil was drained out of the compressor (after the old gas was removed) and the new oil was added to the compressor before the system was sealed/ evacuated and R134A gas added.

Refrigerant is a very efficient degreasing agent (it used to be used in the dry cleaning industry), therefore the gas will strip the oil from the compressor and carry the oil round the system. Although the two are technically separate you will find oil in all parts of the system.
Correction to earlier post, it's only the rubber lines that should be replaced (along with the seals) due to the fact that they can absorb oil and cause problems with the new set up. The solid lines will be fine. Anyway at the end of the day it's very unlikely that you will get any noticable difference in capacities.

What happens if the air con comes on and goes off by itself?

Would this likely to be a thermostat issue or a compressor issue?

unless you had some fancy electronic climate control in your vehicle i would very highly doubt you would have a thermostat. correct me if im wrong refrig/ac experts

OK, it is a DX 4.2 Patrol.

I think that it does have a thermostat. It's under the dash in the passenger foot well.

I'm thinking that it could be due to this, or the compressor having a dodgy power connection which periodically works/ then doesn't.

Any ideas?