I need to know how to discharge my a/c system to do work on it.?

Question:
i have a '98 isuzu p/u trk, 2.2 ltr engine, automatic trans. the compressor makes a whirring sound when a/c is turned on.
thanks.

Answers:

What can cause a 2002 ford fiesta to fail emissions test?

That would be quite a job and the freon is supposed to be captured and not released, but the whirring noise could be just belt noise. I would check with a professional. ~

My 1993 GMC Jimmy will only blow air through defrost vents, how do I fix it?

Not to send a cheesy answer, but you need to take it to a certified shop to collect the freon from your system. R134a is cheap to buy yourself and refill, so you won't have any issues there, but it is illegal to let the gas escape into the atmosphere.

How do I get copies of the ignition key for my 2002 Buick Century?

If you’re not an A/C tech, why are you bothering in the first place? What can you do to fix this problem? Releasing refrigerant into the atmosphere is illegal, it must be reclaimed. Did you go to a shop that doesn't touch Freon systems, but told you that they can fill it, if it's empty? Just have it serviced by a professional.

Searching for a mecanic or that kind of person?

You have R-134 so it won't wreck the planet too bad if you just vent it. The harder part is when you fill it back up. You have to leave a vacuum on it for a while to get every last bit of air and water out before you put the refrigerant in.
It sounds like your compressor bearings are going.
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