Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 113 (HVAC SYSTEM - GENERAL SERVICING)ORIFICE TUBE REPLACEMENTHVAC SYSTEM - GENERAL SERVICINGINSTALLATION
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
HVAC System - General Servicing: Installation
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Installation
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 1998 Pontiac Trans Sport, 1998 Oldsmobile Silhouette, 1998 Oldsmobile Bravada, 1998 GMC Yukon, and 1998 GMC Suburban. However, it is still accessible from the selected car via links, so may be relevant.
- Clean liquid line fitting with NEW refrigerant oil. Coat inside of liquid line and NEW "O" ring with NEW refrigerant oil. Lubricate NEW orifice tube and "O" ring with refrigerant oil and insert them into liquid line. Insert longer orifice tube screen (inlet end) into condenser outlet line first, toward condenser.
- Tighten liquid line fitting to 18 ft. lbs. (24 N.m). To complete installation, reverse removal procedure. Evacuate, charge and test system for proper operation.
- Clean liquid line fitting with NEW refrigerant oil. Add one ounce of NEW refrigerant oil to system. Coat inside of liquid line and NEW "O" rings with NEW refrigerant oil. Lubricate NEW orifice tube and "O" ring with refrigerant oil and insert them into liquid line. Insert shorter orifice tube screen into liquid line first with long screen (inlet end) toward condenser.
- Tighten liquid line fitting to 20 ft. lbs. (27 N.m). To complete installation, reverse removal procedure. Evacuate, charge and test system for proper operation.
- Clean liquid line fitting with NEW refrigerant oil. Add one ounce of NEW refrigerant oil to system. Coat inside of liquid line and NEW "O" rings with NEW refrigerant oil. Lubricate NEW orifice tube and "O" ring with refrigerant oil and insert them into liquid line. Insert orifice tube into liquid line with long screen (inlet end) toward condenser.
- Tighten liquid line fitting to 20 ft. lbs. (27 N.m). To complete installation, reverse removal procedure. Evacuate, charge and test system for proper operation.
ORIFICE TUBE LOCATION & REMOVER/INSTALLER APPLICATION
| Application | Orifice Tube Location | Orifice Tube Remover/Installer | |
|---|---|---|---|
| "C" & "K" Series | |||
| With Rear A/C | Evaporator Inlet | J-26549-E | |
| Without Rear A/C | Condenser Outlet | J-26549-E | |
| "G" Series | Evaporator Inlet | J-26549-E | |
| "L" & "M" Series | Evaporator Inlet | J-26549-E | |
| "S" & "T" Series | Evaporator Inlet | J-26549-D | |
| "U" Series | Condenser Outlet | ***** | |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.