If you can't find the condenser coil just take it to a shop. It will be cheaper.

 

Here is a direct link to the FSM on this matter:
http://ncttora.com/fsm/2003/Repair_M...c/acsy/ovi.pdf

Interesting to note the FSM refers to pressures rather than weight like a previous poster said. I respect his knowledge on the matter, just pointing that out.

 

Filling up refrigerant with a pressure gauge is like changing motor oil by checking the dipstick. Filling up refrigerant by weight is like draining all the oil, then adding back the amount specified by the manufacturer. By weight is certainly more reliable, with the only inaccuracy coming from the weight scale.

The FSM is written for 86-95F ambient. So if the day is much cooler than the design temperature, the gauges method will be inaccurate. Refrigerant weight in can be done in the winter, in Alaska

 

I have the other current a/c post here and FogRunner has given me some EXCELLENT information and steps to take to refill my a/c. When I do it, I will be taking the steps to evacuate the majority of the refrigerant (down to about 3-5psi) by releasing the low side and adding using the manufacturer's recommended weight.

 

It kinda is like the dipstick method as long as the vehicle is at the specified conditions. But if the vehicle is out of the spec conditions in the FSM (temp,humidity ETC) then its like trying to use the stock dipstick to check the oil when the car is parked on a hill.

 

Wait wait wait --- When if you were on the MOON, and tried to use the weight measurement... Then you'd be way off. I told you I was right!!!

 

Just multiply manufacturer's spec by 0.166 to get proper weight on the moon. Every good HVAC guy knows that.

 

What is the proper weight? I don't have a sticker under the hood....and am going to be installing a new compressor shortly.

Thanks