Where is the orifice tube on a 1991 Chevy s10?

Orifice Tube Location on a 1991 Chevy S10
The orifice tube on a 1991 Chevy S10 is located in the inlet tube of the evaporator, or in the liquid line, somewhere between the outlet of the condenser and the inlet of the evaporator. This point can be found in a properly functioning system by locating the area between the outlet of the condenser and the inlet of the evaporator that suddenly makes the change from hot to cold. Most of the orifice tubes in use today measure approximately three inches in length and consist of a small brass tube, surrounded by plastic, and covered with a filter screen at each end.
The orifice tube is an expansion device that controls refrigerant volume in front of the A/C evaporator. It prevents the evaporator from freezing and is not adjustable like an expansion valve. Symptoms of a bad or failing orifice tube include the compressor running constantly, frost coming from the vents, or the A/C not working as well as it should.

What should you do to remove an orifice tube?

The easiest way to remove it is to pre-lubricate the line where the orifice tube sits it with the AC flush which should be used before recharging the system to clean out oils, residue and metal that your now defunct AC compressor probably back washed into the AC system before dying out.

Will orifice tube affect AC?

Underperforming AC System
A faulty orifice tube can affect the refrigerant flow and the evaporator won’t be provided with sufficient flow. The lack of flow also means that there won’t be enough refrigerant to absorb the heat that the condenser is providing. A result of all this will be an underperforming AC system.

What are the symptoms of a bad orifice tube?

4 Bad Orifice Tube Symptoms To Watch Out For

• The Compressor Is Not Able To Pull In The Specified Amount Of Refrigerant.
• An Intermittent Loss Of Air Conditioning.
• A Loud Hiss Coming From Inside The A/C System.
• You Notice Bubbles Within The Sight Glass.
• Conclusion.

How do I know if my expansion valve is clogged?

1. Warm Air from Vents. A common symptom of a bad expansion valve is hot air blowing from air vents in the car. Warm air blowing from car AC vents indicates that the refrigerant is unable to flow properly through the system.

How often do you change orifice tube?

The orifice tube must always be replaced when another important part of the A/C loop is replaced (compressor, condenser, evaporator, or accumulator) Flush the A/C loop before installing a new orifice tube.

Can a orifice tube be cleaned?

Submerge the orifice and nozzle body into an ultrasonic cleaner filled with white vinegar. 5. Run the ultrasonic cleaner for 3–5 minutes or until clean.

Where is the orifice tube on a 2002 Chevy s10?

Ok, the tube is located in the line into the evaporator. Hello and welcome to Just answer, The orifice tube is located in the evaporator inlet, the line is disconnected and the tube removed.

Where is the orifice tube on a 1991 Suburban?

Welcome to the forum, Since about mid-year 1991, the orifice will be in the lower line on the condenser, so you’ll have to remove the grille to access it. Early 1991-back to 1988, it was in the lower line off the evaporator.

What happens if orifice tube is backwards?

It will work backwards for a while. If the system is contaminated it will plug up faster backwards.

Where is the orifice tube located?

Had a black plastic clamp that licked that clicked over here. So if that’s there that just pops off by hand. And then you use this tool from this side you pop it in like that. And just kind of wiggle.