sprie

I have started to disassemble the parts of the air conditioning system I have access to, to replace as many seals as I can (my compressor is being rebuilt, I have a new dryer and new valves).

I have ordered various seals individually in the UK, based on the part numbers in the 1990 PET.

Whilst I suspect the seals I get will be fine for most of the connections, I have already found an anomaly. Looking at the PET, my car seems to have the various parts around the condenser consistent with the 1990 PET, but around the fuel cooler, it is more consistent with the 1992 PET. So, for instance, the seal I have purchased to connect the fuel cooler to the pipe which runs to the compressor is much smaller than the connection I have on my car.

I am wondering if the best course of action now is to buy a generic air conditioning O-ring kit, and use this for the few cases where my car is different to the PET.

Is this a sensible thing to do? Is it possible to match the generic O-ring size to a connection such that it is likely to hold pressure, or am I likely to have leaks?

I have purchased some Liqui Moly PAG Air Conditioning Oil, and was going to coat each seal with this as I assemble.

FredR

Ian,

The 1990 PET will give you part numbers for a system equipped with R12 and those rings are typically black in colour. You suggest you are using PAG oil and that implies you have converted or are converting to R134. The problem with PET is that whereas it gives you the part numbers it does not give you the sizes needed. If you look at PET for the GTS models there are two pages of spec- one for R12 systems on the early GTS models and one for the later GTS models kitted out with a R134 system. Unfortunately there are differences between the two systems and I do not know whether the R134 system with green rings uses exactly the same sizes- theory says it should but...?

What I did was to find out the rings sizes used in my R12 system and then get the same size rings in the green R134 spec. Somewhere I should have a list of the sizes compared to part number and if I can find iit tomorrow will post such. There are some clues to be had on the Pelican parts website- doubtless other sites as well. You can also try a search of Rennlist but do so from Google and include the word Rennlist in your search criteria.

karl ruiter

Roger has the orings in R134 Green.

GregBBRD

Buy a complete "conversion kit". There's more than enough green O-rings in one of these to replace everything.
And the complete kits are cheap...unlike individual O-rings, from Porsche.

I use the Santech MT8004 kit. (A whopping $13, my cost.)
Just don't use the adapter fittings in this kit that go from R12 to R134. (Not very good pieces, which inevitably leak.)