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brownjeff
brownjeff, ASE Certified Technician
Category: Car
Satisfied Customers: 13886
Experience:  17 years experience, ASE certified, dealership certified, Service Manager for 15 years,
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1997 chevy suburban: me a diagram of exactly the rear expansion valve

Customer Question

can you show me a diagram of exactly the rear expansion valve for the a/c is in a 1997 chevy suburban
Submitted: 7 years ago.
Category: Car
Expert:  brownjeff replied 7 years ago.

I will attach the information you requested.

 

Evaporator Tube Location


Tool Required:
J 26549-E Orifice Tube Remover and Installer or Equivalent

Remove or Disconnect

  1. Recover refrigerant.
  2. Grille.
  3. Primary evaporator tube from the junction block / auxiliary evaporator tube.
  4. O-ring seal.
    • Cap or plug the open line.
  1. Expansion (orifice) tube from the primary evaporator tube, using J 26549-E or equivalent.
    • In the event that difficulty is encountered during the removal of a restricted or plugged expansion (orifice) tube, the following procedure is recommended:

A Remove as much of any impacted residue as possible.

  1. Carefully apply heat with heat gun (hair drier, epoxy drier or equivalent) approximately 7 mm (1/4 inch) from dimples on inlet pipe. Do not overheat pipe.
  2. While applying heat, use expansion tube removal tools J 26549-E or equivalent to grip the expansion (orifice) tube. Use a turning motion along with a push-pull motion to loosen the impacted expansion (orifice) tube and remove it.

Install or Connect

  1. Expansion tube into primary evaporator tube, using J 26549-E or equivalent.
  2. New O-ring seal.
    1. Coat O-ring seal with 525 viscosity refrigerant oil.
    2. Insert the short screen end of the new orifice into the evaporator tube first.
  1. Primary evaporator tube to the junction block / auxiliary evaporator tube.
  2. Grille.
  3. Charge system.
  4. Check system for leaks.
Customer: replied 7 years ago.
Is this for the rear a/c unit? Because it looks like the one in the front.
Expert:  brownjeff replied 7 years ago.
Yes, it is for the rear.