Express 3/4 Ton Van V8-4.8L VIN V (2003)
Heater Control Valve: Service and Repair
COOLANT BYPASS VALVE REPLACEMENT
TOOLS REQUIRED
J 38185 Hose Clamp Pliers
REMOVAL PROCEDURE
1. Remove the air cleaner.
2. Remove the upper fan shroud.
3. Drain the engine coolant.
4. Remove the upper heater inlet hose clamp and the upper heater outlet hose clamp from the inlet of the coolant bypass valve (4) using the J 38185.
5. Remove the upper heater inlet hose and the upper heater outlet hose from the outlet of the coolant bypass valve.
6. Remove the lower heater inlet hose clamp and the lower heater outlet hose clamp from the outlet of the coolant bypass valve (4) using the J 38185.
7. Remove the lower heater inlet hose and the lower heater inlet hose from the inlet of the coolant bypass valve.
8. Remove the vacuum hose from the coolant bypass valve.
INSTALLATION PROCEDURE
1. Install the coolant bypass valve (4).
2. Install the vacuum hose to the coolant bypass valve.
3. Install the lower heater inlet hose (5) and the lower heater outlet hose (6) to the inlet of the coolant bypass valve (4).
4. Install the lower heater inlet hose clamp and the lower heater outlet hose clamp to the inlet of the coolant bypass valve using the J 38185.
5. Install the upper heater inlet hose and the upper heater outlet hose to the outlet of the coolant bypass valve.
6. Install the upper heater inlet hose clamp and the upper heater outlet hose clamp to the inlet of the coolant bypass valve using the J 38185.
7. Fill the cooling system.
8. Install the upper fan shroud.
9. Install the air cleaner.
