Re: 4K A/C charge

[enzeder@ix.netcom.com]

IMHO I think you'll want to recharge the system, and it's not that expensive.  All you'll need to convert from (stock) R-12 refrigerant to R-134a are the 
adapter fittings for the high and low pressure connectors.  I know my 4ks has the necessary barrier hoses so I assume yours does.  It's easy to check: 
look at where the hose is crimped and if you see longitudinal crimps as well as circumfrential crimps, you're set.  I know the Audi A/C isn't great to 
start with, but R-12 is being taxed out of existence, which is why I feel R-134a is the way to go.

The reason you should charge the A/C is because normally the defrost setting on your heater actually activates the A/C compressor.  My Dad explained it 
to me once, but I'm not 100% sure why, I think it's used to dry the air. 

BTW, how much did you pay for the O2 sensor, and did you replace the Cat at the same time?

Arryn.



On 09/25/97 20:27:44 you wrote:
>
>Audi'ites,
>Today I tackled the heater core project.  Definitely not the easiest thing
>to get to, and my a/c charge had to be sacrificed in order to slide the
>evaporator forward enough to gain access the core itself.
>Although the winter months are just around the bend, I know that I will be
>getting my a/c recharged in the spring/summer of next year.  I was wondering
>if anyone can tell me what type of refrigerant I should be asking for and if
>it will be available to me when the time comes (sorry, I'm ignorant of these
>things).
>If a conversion is necessary, I will live without the a/c.
>Thanks in advance.
>Oh yeah, I did the 02 sensor as well today and did not have to drop any of
>the exhaust to gain acess.
>No more wandering idle, pinging under load, bogging down.  I bought the
>sensor from a Bosch dealer and saved over $100 dollars from the local dealer.
>A great day for the 4K, and we can't wait for that first snowfall.
>
>Regards,  Jeffrey Smethers (smethers@fast.net)
>General Manager - Span America
>'74 tii, '86 4KCSQ