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Old 10-20-2009, 02:07 PM   #1
Gmanpumps
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2002 L-Series 2.2L Sedan
Default Thermal Expansion Valve

Any of you guys know the proper way to install a thermal expansion valve on a 2002 L100 with the 4 Cyl. I know there is a tool of sorts, but if you have done it and have advice, please let me know. Gman
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Old 10-20-2009, 02:34 PM   #2
SaturnTech122
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1996 SL2
Default Re: Thermal Expansion Valve

Notice: Place protective covers over A/C hoses, lines, TXV, and HVAC module to prevent contamination of A/C system.

Important:

Verifying the purity of the refrigerant with a purity identifier before recovery is recommended.

Clean tools and a clean work area are important for proper service.

On earlier vehicles a bolt was used instead of a stud/nut.


Recover the refrigerant using an approved refrigerant recovery system. Measure the amount of oil lost during recovery and record the amount.
Remove the suction/liquid line block from the TXV by gently rocking it while pulling forward.
Install a cap on suction/liquid line assembly to prevent oil spillage.

Remove the TXV retaining bolts.

On earlier vehicles, install the suction/liquid line assembly to the TXV bolt hand tight into TXV.

Using bolt or stud as a handle, remove the TXV from the evaporator by gently rocking the TXV while pulling forward in the vehicle.

Using your fingers or a plastic tool, remove the O-rings from the evaporator pipes. Use a mirror to view the O-rings on the evaporator core.



Installation Procedure


Install new O-rings to the evaporator pipes.

Caution: Blower resistor card has sharp edges and may be very hot if blower was used prior to servicing.

Install the TXV using the TXV Installation Tool to support the evaporator pipes and mounting flange while installing the TXV.
Orient the TXV with the dome-shaped end toward the passenger side of the vehicle.

Install the cap screws through the T-handle and through the TXV.

Thread the (2) cap screws into the evaporative core flange

Pull the T-handle back against the cap screws and carefully install and seat the TXV into position.

Carefully remove cap screws and T-handle.

Apply a thin coating of clean mineral oil on the TXV to evaporator O-ring surfaces.
Important: On earlier vehicles a bolt was used instead of a stud/nut.
Insure the TXV is completely installed, the TXV should be almost flush with edge of bevel of the TXV foam seal.
Notice: Improper installation of TXV to evaporator pipes will damage pipes and require evaporator core replacement.
Thread the TXV to evaporator core block bolts into the block by hand. The bolts should thread in easily. Do not use force! If the bolts do not thread in easily, verify that the TXV is properly installed onto both pipes and fully seated to the block.
Thread the TXV to evaporator core block bolts into the block by hand. The bolts should thread in easily. Do not use force! If bolts do not thread in easily, verify that the TXV is properly installed onto both pipes and fully seated to the block.
Tighten
Tighten the TXV-to-block bolts to 7 Nm (62 lb in).
Thoroughly clean the O-ring surfaces of the TXV.
Install new O-rings to the suction/liquid line assembly block.
Lubricate the O-rings with clean mineral oil.
Install the suction/liquid line assembly block to TXV.
Important: On earlier vehicles a retainer bolt was used instead of a stud/nut.

Install the suction/liquid line assembly to TXV nut.
Tighten
Tighten the suction/liquid line assembly-to-TXV Bolt to 7 Nm (62 lb in).

Evacuate, charge, and leak check the A/C system.
...
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