Thermostat Housing: Service and Repair

Engine Coolant Thermostat Housing Replacement (LTG)

Removal Procedure

Special Tools

BO-38185 - Hose Clamp Pliers

For equivalent regional tools, refer to Special Tools Tools and Equipment.

Note: The thermostat and thermostat housing are serviced as an assembly.

1. Drain the cooling system. Refer to Cooling System Draining and Filling (GE 47716) Cooling System Draining and Filling (GE 47716)Cooling System Draining and Filling (Static Fill) Cooling System Draining and Filling (Static Fill).

2. Remove the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement (LUK) Exhaust Manifold Heat Shield ReplacementExhaust Manifold Heat Shield Replacement (LCV) Exhaust Manifold Heat Shield ReplacementExhaust Manifold Heat Shield Replacement (LTG) Exhaust Manifold Heat Shield Replacement.

3. Remove the radiator outlet hose (1) from the engine coolant thermostat housing (2).

4. Remove the engine coolant thermostat housing fasteners (3) and remove the engine coolant thermostat housing (2).

5. Discard the engine coolant thermostat housing seal (1).

Installation Procedure

1. Clean the sealing surfaces.

Caution: Refer to Fastener Caution Fastener Caution.

2. Install the engine coolant thermostat housing (2) with a NEW seal (1) and tighten the fasteners (3) to 10 Nm (89 lb in).

3. Install the radiator outlet hose (1) to the engine coolant thermostat housing (2).

4. Install the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement (LUK) Exhaust Manifold Heat Shield ReplacementExhaust Manifold Heat Shield Replacement (LCV) Exhaust Manifold Heat Shield ReplacementExhaust Manifold Heat Shield Replacement (LTG) Exhaust Manifold Heat Shield Replacement.

5. Fill the cooling system. Refer to Cooling System Draining and Filling (GE 47716) Cooling System Draining and Filling (GE 47716)Cooling System Draining and Filling (Static Fill) Cooling System Draining and Filling (Static Fill).

6. Start the engine and check for coolant leaks.