Can I really use R134a?

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Jared
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Can I really use R134a?

Postby Jared » Thu Jul 17, 2014 12:38 pm

Hi JEC,
I am going to (try) to recommission the aircon on my '88 V12. I have been reading through previous posts on this subject especially neilxjs post from 28th May.
I have asked a few aircon places in edinburgh if they can supply R45 gas but no. My regular garage says R134a will work fine in an old system and this is confirmed by almcl comment in the previous post. My question is do I need to change any components and is there a possibility of long term damage to any of the AC components?
Thanks
Jared

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poprivet

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Re: Can I really use R134a?

Postby poprivet » Thu Jul 17, 2014 1:41 pm

I've not heard of R45? Maybe you mean R413 (RS24)

Have a read what KWE have to say about the subject at:

http://www.kwecars.com/jaguar/airconmyth.php

Not everywhere uses it due to seperate sets of equipment and cross contamination, I don't know about Scotland but there must be independants who work on older systems for Mercs / Volvos / BMWs etc. First step I guess is to have a vacuum pulled to make sure the system is sound. Certainly the dryer will need replacing in any case.
1988 3.6 XJ-S coupe
'Remember that the value of your investment can plummet as well as fall'

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Jared
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Re: Can I really use R134a?

Postby Jared » Thu Jul 17, 2014 1:55 pm

Hi poprivet, yes my mistake i meant RS24 or R49. I have looked at the KWE site and contemplated a long drive down there as a last resort. I will keep trying aircon specialists up here
Thanks

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Jared
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Re: Can I really use R134a?

Postby Jared » Thu Jul 17, 2014 2:55 pm

My next question is where do I buy a replacement dryer and do i need to replace other bits of pipework? I see jaguar classic parts has two. Do I need the CFC free dryer?

almcl
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Re: Can I really use R134a?

Postby almcl » Thu Jul 17, 2014 7:59 pm

As a minimum you need to change the receiver drier, the oil, the charging ports and the O rings. There was a Jaguar kit (and a TSB explaining how to do it, which as far as I can remember makes no mention of replacement hoses, just to contradict one of KWE's somewhat contentious statements on the subject) . Independents still carry a version of this kit, or did when I converted my '84 car three years ago. If you can acquire a set of gauges and a vacuum pump, understand the principles outlined in Kirby Palm's book and the manual, you can get your system to hold vacuum and then just present it to a local charging station for a £35 regas
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Al McL
'93 XJS 4.0 - '05 X type Est 2.0D - '13 XF 2.2D Sportbrake

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Jared
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Re: Can I really use R134a?

Postby Jared » Fri Jul 18, 2014 10:14 am

Thanks almcl
Last question, do I need a CFC free reciever dryer?

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Re: Can I really use R134a?

Postby almcl » Fri Jul 18, 2014 1:00 pm

You do, but I very much doubt you would be able to buy one that wasn't.
Al McL
'93 XJS 4.0 - '05 X type Est 2.0D - '13 XF 2.2D Sportbrake

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Jared
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Re: Can I really use R134a?

Postby Jared » Fri Jul 18, 2014 4:49 pm

Grand, thanks for all the advice

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BigCatXJS

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Re: Can I really use R134a?

Postby BigCatXJS » Fri Jul 18, 2014 6:46 pm

Hi Jared,

I don't know where you are based, but I had mine converted to R134A about 5 years ago. No issues so far. I had mine done at MDM Jaguar Services in Coalville.

Rich.
1989 Jaguar XJ-S V12 HE 5-speed manual
1994 Jaguar XJ40 Sovereign
2007 Mercedes CLK350 AMG Convertible
2010 BMW E92 3 Series Coupe heavy oil burner

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Jared
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Re: Can I really use R134a?

Postby Jared » Sat Jul 19, 2014 12:01 am

Hi BigCatXJS, I'm in Edinburgh. I know some specialist mechanics who help with most stuff but I'm doing my own homework with the aircon conversion


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