r-134a retrofit conversion kit

[changyeamoon]

Yes I am familiar with this thread!

https://www.r3vlimited.com/board/showthread.php?t=246743

I still wanted to ask in hopes someone has more dated insight. or someone with the same vehicle 1990 325i E30.

First I wanted to confirm the parts/part numbers. I am looking to do a complete conversion.

64-51-1-468-560-M203 A/C Evaporator
64-11-8-363-259-BOE Filling Valve Adapter
64-11-8-363-260-BOE Filling Valve Adapter
64-53-8-390-971-BOE Safety Pressure Switch
64-53-8-391-025-M326 Receiver Dryer
64-51-1-466-259 Expansion Valve

The O rings, I get confused about. The thread listed above lists these and says to get 8 each? seems a bit much.
64501468463 (64-50-8-390-601)
64501468464
64501468465 (64-50-8-390-603)
64501468466
64508390605

I also have a pretty detailed pdf, forgot how i got, that only mentions these 2 O rings.
64 50 8 390 601
64 50 8 390 602
I'm all for making sure i have more than enough, but if anyone can bring insight to this i would very appreciate it. seems like some parts (like the evaporator) come with o rings as well

and of course the compressor and condenser. I would love recommendations. A bolt on would be great but willing to retrofit a nice compressor.

ALSO I want to change my pipes.. where get r134 ones?

[uturn]

Be sure to use Ester oil instead of Pag.

[Todd Black 88]

I am just asking, but isn’t there any better setup for the e30 now? I mean r134a is a crappy stop gap refrigerant that is basically not used anymore.

We don’t even stock it at our hvac shop anymore.

[TobyB]

...and it's due to be phased out for something that sounds suspiciously like propane
in a very expensive party dress... 1234ka-BOOM or something like that...

t
just because I'm paranoid doesn't mean this ISN'T another scam...

[changyeamoon]

Be sure to use Ester oil instead of Pag.

If I am doing a full 134a conversion i think ill use PAG!

[changyeamoon]

I am just asking, but isn’t there any better setup for the e30 now? I mean r134a is a crappy stop gap refrigerant that is basically not used anymore.

We don’t even stock it at our hvac shop anymore.

wuhhhh, please explain more! Is there another conversion out there i am not familiar with?

[Big swifty]

R12a.

[changyeamoon]

R12a.

?

[Big swifty]

If you're going to go through all that consider using R12a (specifically Redtek) as a refrigerant. There are those in both the pro and con camps- some very zealous.

R12a is more efficient.

The main knock on HC-based refrigerants is based on flammability. It is my understanding ALL refrigerants are flammable when compressed. My decision is based on the fact that the worry of a few oz of R12a compared to the many gallons of gasoline is similar. I haven't seen anybody demonstrate an actual case of passengers being injured from the use of R12a.

[changyeamoon]

If you're going to go through all that consider using R12a (specifically Redtek) as a refrigerant. There are those in both the pro and con camps- some very zealous.

R12a is more efficient.

The main knock on HC-based refrigerants is based on flammability. It is my understanding ALL refrigerants are flammable when compressed. My decision is based on the fact that the worry of a few oz of R12a compared to the many gallons of gasoline is similar. I haven't seen anybody demonstrate an actual case of passengers being injured from the use of R12a.

Mmmmm what do you mean by effiency? I’ve never heard of r134 as being inefficient or not efficient enough and it r12a as widely available as r134a?

[Big swifty]

There is A LOT of information about R12a on the interwebs. This subject can quickly turn into a "heated" dialogue.

It has a larger molecule size so it's less likely to leak out of hoses. It runs at lower pressures (higher efficiency) than R134.

I decided to use it. YMMV. The VW vanagon guys have had great experiences,

https://www.thesamba.com/vw/forum/viewtopic.php?t=292488&postdays=0&postorder=asc&highlight=redtek&start=0

[Aleman]

I bought an r134 seal kit off ECS, and the seals are all grey. Have you guys seen grey r134 seals, or do they have to be green? When I questioned them, ECS said these are r134 seals. It doesn't look like picture online.

https://www.ecstuning.com/b-genuine-...4508390605~kt/


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[E30335i]

From my experience grey is oil safe and green can handle the bigger pressures of 134a


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[noid]

Go R12A (Hydrocarbon replacement for R12), swapping to R134a is silly.