Turbocharger Coolant Bypass Valve Replacement 6.6L (LB7) Engine

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



2. Disconnect the turbocharger coolant hose from the turbocharger bypass valve.



3. Remove the turbocharger bypass valve and sealing washer from the water outlet tube.

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.

1. Install the turbocharger bypass valve and sealing washer to the water outlet tube.

Tighten
Tighten the turbocharger bypass valve to 60 N·m (44 lb ft).




2. Connect the turbocharger coolant hose to the turbocharger bypass valve.
3. Fill the engine coolant. Refer to Cooling System Draining and Filling .

Turbocharger Coolant Bypass Valve Replacement 6.6L LLY

1. Remove the air cleaner. Refer to Air Cleaner Replacement for the 6.6L (LLY) engine.
2. Drain the cooling system. Refer to Cooling System Draining and Filling .
3. Reposition the coolant inlet hose clamp.
4. Disconnect the turbocharger coolant inlet hose from the turbocharger bypass valve.



5. Remove the turbocharger bypass valve and washer.

Notice: Refer to Fastener Notice in the Preface section.




1. Install the turbocharger bypass valve and washer.

Tighten
Tighten the valve to 60 N·m (44 lb ft).




2. Connect the turbocharger coolant inlet hose to the turbocharger bypass valve.
3. Position the coolant inlet hose clamp.
4. Install the air cleaner. Refer to Air Cleaner Replacement for the 6.6L (LLY) engine.
5. Fill the cooling system. Refer to Cooling System Draining and Filling .