Need to add freon to '99 chevy venture
on a 99 they use R134A and I suggest you buy a can from autozone the one with a gauge on it and it has compressor oil in it. When you use the can that has the gauge it will tel you several things one if the compressor is leaking and does it have vachum and it will keep you from over charging. It will hook up on the low side, and it will be on the passenger side by the fire wall. unscrew the blue cap start the car turn the ac to max A/C and fan on max do this in the morning as it will take a chage better if it's not hot, then crack open the valve on the can to allow enoungh freon to get the air out of the line of the can, this is very important, air mixed with refrigerant creates an acid in the ac system and will eat the rubber hoses and the orifce tube. Now screw the cap of the can on quickly and get it tight and open the valve on the can 1/2 to 3/4 turn and watch the gauge, shake the can back and forth to allow gas and liquid into the sytem so it will not slug the compresor with to much liquid and damage the compresssor, continue to wath cht gauge if it gets about 50 then shut off the valve and wait watch the gauge to see if it drops down to 30 if it does check inside to see if the air is cool if it's colder ad a little more watching the gauge as you do and continuelly shaking the can back and froth that is from side to side not up and down, I want to be clear about that. If the gauge reaches 50 shut the valve off check to see if it is cooling more, watch the gauge with the valve off if it drops to 30 again then quickly unhook the can screw the cap back on and then drive it on a stright away for a couple of miles to see if it gets cooler, if it does you may try to add more refrigerant but be careful cause at a certain point like 50 on the gauge it will stop cooling and yo will have it over charged and since you can't see the high side pressure we are just guessing what it is, if it's 30 on the low side then it will be 225 on the high side if its close to 50 the high side will be 300 to 350 and close to poping the safety release valve. good luck and hope this helps, normally the reciever dryer has to be replaced and the orifice tube but you might get lucky. And follow the direction I gave you exactly, if you see the pressure build to over 50 shutthe car off and unhook the hose anddo not attempt to charge it, it can blow the can up if the pressure gets to high. Good Luck.
Jul 24, 2009 |
1999 Chevrolet Venture