Heater Water Bypass Valve Replacement Auxiliary

1. Drain the coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.



3. Disconnect the front hose connections from the by-pass valve.
4. Disconnect the rear hose connections from the by-pass valve.
5. Remove the nut from the by-pass valve.
6. Remove the by-pass valve from the vehicle.

1. Install the by-pass valve to the vehicle.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the retaining nut to the water by-pass valve.

Tighten
Tighten the retaining nut to 5 N·m (44 lb in).

3. Connect the rear hose connections to the by-pass valve.
4. Connect the front hose connections to the by-pass valve.
5. Lower the vehicle.
6. Fill the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.

Heater Water Bypass Valve Replacement Primary

Tools Required

J 39529 Heater Hose Pliers

1. Drain the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.



2. Remove the hose clamps from the outlet pipe and the inlet pipe using the J 39529 .



3. Disconnect the heater inlet pipe and the outlet pipe from the by-pass valve(s).
4. Remove the by-pass valve (3) from the vehicle.

1. Install the by-pass valve (3) into the vehicle.
2. Connect the heater inlet pipe and the outlet pipe to the bypass valve(s).



3. Install the hose clamps using the J 39529 .
4. Fill the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
5. Verify that the system has no leaks.