[jeff968]

Thanks guys! Just curious, my replacement used compressor is from a later 968 so it says R134A on it. How does it compare to my original 92 compressor? The same?

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[banditsc]

From what I have seen, it's the same. Just different seals in it.

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[jeff968]

What's involved with the refrigerant charge? Easy? (R134a)

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[banditsc]

It's a shop job unless you got all the tools. Mainly a good vacuum pump for when you get everything back together and ready to charge it.

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[jeff968]

Thanks Bandit, are the two O-rings the same? 944 126 935 01 They look different on the part but Pet says only 1?

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[banditsc]

The top of the compressor where the hoses attach actually take four of the same o-ring. Your actually better off picking up one of those 100+ metric A/C o-ring kits for like $20 or something. You will have more then enough of the various size rings you need, I done a few cars with them. There are a number o-rings in the system that need to be replaced.

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[jeff968]

Bandit,
Thanks again, i was only planning on doing the 4 since I'm just replacing the compressor. I'm assuming the others were done when the A/C was converted.
Thanks
Jeff

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[banditsc]

You would be suprised.. Some shops concept of conversion is screwing on the adapters to the charge ports and calling it done. If there are any black o-rings in the system, it wasn't converted. The hardest ones are at the expansion valve, which also should be changed for R134a conversion. I think in the 968 you need to get the dash out to get to them.

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[jeff968]

Bandit,
Is there a way to determine where a leak is happening?
Thanks
Jeff

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[banditsc]

If the refrigerant has dye in it, you can use a black light to search for the leak. A large leak would leave you with green stuff leaking from the area. Another method is with a sniffer, but you would need a shop for that.

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[jeff968]

And if it is the expansion valve under the dash that is leaking I can imagine that would be a challenge to identify and fix, right? Thanks!!!

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[banditsc]

Ya, it is a pain to get at. You can either roll the dice and leave it and hope the o-rings are good or replace it. The expansion valve opens and closes at a specific temp, normally they are different for r12 and r134a based on the temp ranges of the different refrigerants.

Either way, when you go to have it charged and they pull a vac on it, they will be able to see if the system is holding or not.

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[jeff968]

"Either way, when you go to have it charged and they pull a vac on it, they will be able to see if the system is holding or not.
"

Hmmm, so they should know? Even small leaks? I lost my refigerant after 2 days. The shop that did the upgrade said it was probably the compressor but shouldn't they have known that?

Thanks for your help.

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[banditsc]

They should have put a vac on it and checked it for leakdown. They may have seen leakdown and guessed at where the leak was. They could have done some sniffing or black light work to actually track down the leak.

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[flash]

it could be any one of the components or their seals - condenser, dryer, hoses, etc - they should be able to do the test indicated, and determine the location of the loss

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[Paul David Anthony]

My A/C compressor is close to shot.

Like Jeff said, this APPEARS to be somewhat doable for a DIY-er. The compressor is surprisingly accessible from below and aside from the tension on the belt, the job does not look that hard.



Am I off base on this one?

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[flash]

not really - should be doable - the only issue is the evacuation of the refrigerant - you don't want to just dump that to the atmosphere

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[Paul David Anthony]

Thanks Flash.

My A/C is not cold so I am not sure how much refridgerant is in there.

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[flash]

it's amazing at how little it takes to drop the efficiency



you sure the compressor is on its way out? when is the last time you did a recharge? most cars need a recharge every something like 3 years - i know i'm now due on 3 of my cars, and based on output temps, actually need it on 2 of them

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[Paul David Anthony]

I am pretty sure it is shot because when the car is running, I can see the clutch slipping when I look down at the compressor plus, it is squeaking.

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