"Comboverfish" > wrote in message
oups.com...
>
>
> wrote:
>> Yes, I did put in 2 cans and then added about good part of a third can.
>> So that amounts to nearly 30 ounces. I did not hear any obvious leaks.
>> But I did hear momentary hissing from the low-side valve while I was
>> charging. It was such a short duration I doubt it could have leaked 1
>> lb of freon. I checked all the connections, and I don't see any sign of
>> oil seepage. One possibility is that a leak could be inside the
>> evaporator. But the system held a 30" vacuum for nearly 6 hours with no
>> drop at all. I would be surprised if there is a leak.
>>
>> Unfortunately the compressor does not have warranty. It only had a
>> 90-day warranty, and I kept it for almost a year before installing it.
>> If I can't fix the compressor myself, I will have to trash it and buy
>> another one. Is there a way to check the compressor operation without
>> charging with freon?
>
> The noise you heard from the low side fitting may have just been the
> rush of freon into your system during charging.
>
> With a leak test of 6 hours, it is unlikely that you have a significant
> leak, with the possible exception of your schrader valves (because the
> gauges were hooked up to them at the time).
>
> The best, easiest way to test a compressor is on the car with a
> properly charged system. Evac and charge the system with the correct
> weight of freon, probably .9 oz R134a. Double check your book figure
> by looking in the engine compartment for an A/C label. Use 85% of the
> R12 amount listed. 1.1 lbs sounds a little low even for a Metro; I
> usually trust the car decal over a service book.
>
> Finally, I would say that the compressor is bad based on your
> pressures, but again, make sure your gauges are accurate.
>
> Toyota MDT in MO
>

I'm pretty sure you already know this but you're using R134a and Freon
synonymously in your posts. It should be noted that Freon refers to R12.