A/C question: r12 vs. r134a connectors

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Karl - 09 Jun 2005 20:51 GMT

My Haynes Dodge Dakota Pick-Ups 1987 thru 1996 states: "CAUTION: There are
two types of refrigerant, R-12, used on vehicles up to 1992..." Then is goes
on to say "Use only R134A refrigerant on models covered by this book". But
the book starts with 1987 models.

I'm confused - how do I tell if my 1989 V-6 Dakota uses the old or the new
refrigerant? I just purchased an R-134A conversion kit, which has snap-on
type adapters, whereas the original are screw-on. Can I tell from that?

Thanks.

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TranSurgeon - 09 Jun 2005 21:01 GMT

external threads on the service connectors indicates R-12

'snap-on' type is R-134a

> My Haynes Dodge Dakota Pick-Ups 1987 thru 1996 states: "CAUTION: There are
> two types of refrigerant, R-12, used on vehicles up to 1992..." Then is goes
[quoted text clipped - 6 lines]
>
> Thanks.

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TBone - 09 Jun 2005 21:06 GMT

Your vehicle should be currently using R-12. There should be a sticker
under the hood somewhere stating what type of refrigerant and how much of it
your system uses although it is probably hidden under a layer of oil and
dirt. Your screw on Schrader valves are a pretty good indication that you
are using R-12. I don't think that R134A even existed when your car was
built.

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> My Haynes Dodge Dakota Pick-Ups 1987 thru 1996 states: "CAUTION: There are
> two types of refrigerant, R-12, used on vehicles up to 1992..." Then is goes
[quoted text clipped - 6 lines]
>
> Thanks.

Reply to this Message

SnoMan - 10 Jun 2005 17:36 GMT

> I don’t think that R134A even existed when your car was
>built.

Well it existed and was under refinement but it was not deployed yet
in automotive uses it started to show up in a few cars in 92 and was
every where by 94.

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Steve W. - 11 Jun 2005 03:09 GMT

134A started being used in 91 and was fully implemented in the US by
1995. Depending on the manufacturer you could have either one even in
the same model line. One I can tell you about is the GM S series. The 94
S - Pickups were R-134A, BUT the S - Blazers were still R-12.

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Steve W

> > I dont think that R134A even existed when your car was
> >built.
>
> Well it existed and was under refinement but it was not deployed yet
> in automotive uses it started to show up in a few cars in 92 and was
> every where by 94.

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No Spam for me - 10 Jun 2005 05:02 GMT

Should be R-12 unless it has been converted. Threads or snap on connectors
are the tip off!

> My Haynes Dodge Dakota Pick-Ups 1987 thru 1996 states: "CAUTION: There are
> two types of refrigerant, R-12, used on vehicles up to 1992..." Then is
[quoted text clipped - 6 lines]
>
> Thanks.

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Karl - 10 Jun 2005 17:12 GMT

OK, thanks a lot for the replies. You confirmed my suspicions.

> Should be R-12 unless it has been converted. Threads or snap on connectors
> are the tip off!
[quoted text clipped - 10 lines]
>>
>> Thanks.

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