I have 1998 chev suburban with rear air do they use two orifice tubes
If it has a rear orifice it's in the rear unit under the roof panel.
Most orifice tubes are placed in the high pressure line to the evaporator at the fire wall connection. You will have to empty the freon from the system to replace the orifice tube which is not very expensive (the tube, that is).
under and to the rear of battery in the small (HIGH SIDE LINE) at what looks like a filter clamped to sidewall
On some suburbans its at the connection behind passenger turn signal.
Located in front of the radiator on the passenger side in the condensor line.
The Wrangler uses a fixed orifice system. There isn't a pcv valve. The tube coming from the center rear of the valve cover is the orifice.The Wrangler uses a fixed orifice system. There isn't a pcv valve. The tube coming from the center rear of the valve cover is the orifice.
If its a single evaporator unit (front air only). then it is probably located in the condensor. If it is a dual unit (front and back), the front orfice tube will probably be after the "Y" in the compressor high pressure line, and prior to the accumulator. The rear unit does not use an orifice, but rather a Thermal expansion valve.
It's located on the left side fender well right before you get to the battery, look down and you will see a a/c line disconnect that line and it will be inside, you will needle nose pliers to pull the orifice tube out. >>> (your a/c system has to free of all pressure before you disconnect that line!!!!!)
It is located in the liquid line or tube between the condenser and evaporator.
How do you change the orifice tube on 1997 grand Cherokee jeep with 5.2 v/8
It is located inside of a line that routes off of the condenser and splits between the front and rear A/C sections. The line with the orifice tube heads to the firewall on the passenger side of the vehicle. You'll see a crimped area on the line, where the orifice tube is located. I don't believe you can easily replace the orifice tube without cutting/repairing the line or replacing the whole line assembly. The line has several bends negating pulling the orifice tube out. Pretty inconvenient. The rear A/C uses an expansion valve.