Thermostat: Service and Repair

Engine Coolant Thermostat Replacement (LUK)

Special Tools

BO 38185 - Hose Clamp Pliers

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

Removal Procedure

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

2. Reposition the engine control module.





3. Remove the surge tank hose (1) and the radiator outlet hose (2), from the water inlet housing (3).





4. Remove the water inlet fasteners (1) and remove the water inlet housing (2).

5. Remove the engine coolant thermostat (3) and discard the seal (4).

6. Carefully clean the water inlet sealing surfaces.

Installation Procedure





1. Install the thermostat (3) with a NEW seal (4).

Caution:
Refer to Fastener Caution Fastener Caution.

2. Install the water inlet housing (2) and tighten the fasteners (1) to 10 Nm (89 lb in).





3. Install the radiator outlet hose (2) and the surge tank hose (1).

4. Reposition the engine control module on the battery tray.

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