PRE-RELEASE
Engine Coolant Thermostat Housing Replacement (LLU/A16LET)
| Engine Coolant Thermostat Housing Replacement (LLU/A16LET) |
| Removal Procedure |
| 1. |
Remove the charge air cooler outlet air hose fastener (1).
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| 2. |
Disconnect the electrical connector from the turbocharger pressure sensor.
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| 3. |
Remove both fasteners (2, 3) of the charge air cooler outlet air hose.
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| 4. |
Drain the cooling system. Refer to
Cooling System Draining and Filling (LAU/A28NER)
Cooling System Draining and Filling (LBS/A20DTH)
Cooling System Draining and Filling (LHU/A20NFT)
.
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| 5. |
Remove the fastener (4) from the radiator inlet hose (3).
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| 6. |
Remove the radiator inlet hose from the thermostat housing (5).
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| 7. |
Remove the 4 fasteners (4) and the coolant thermostat socket (3).
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| 8. |
Remove the engine coolant thermostat (1).
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| 9. |
Remove the engine coolant thermostat seal (2).
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| 10. |
Remove heater outlet hose from the heater. Refer to
Heater Outlet Hose Replacement (Diesel)
Heater Outlet Hose Replacement (LAU/A28NER)
Heater Outlet Hose Replacement (LLU/A16LET)
Heater Outlet Hose Replacement (LHU/A20NFT)
.
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| 11. |
Remove heater inlet hose from the heater. Refer to
Heater Inlet Hose Replacement (Diesel)
Heater Inlet Hose Replacement (LAU/A28NER)
Heater Inlet Hose Replacement (LLU/A16LET)
Heater Inlet Hose Replacement (LHU/A20NFT)
.
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| 12. |
Disconnect the electrical connector of the engine coolant temperature sensor. Refer to
Engine Coolant Temperature Sensor Replacement (Thermostat Housing)
Engine Coolant Temperature Sensor Replacement (Radiator)
.
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| 13. |
Remove the air bleeding hose.
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| 14. |
Remove the engine oil cooler inlet pipe from the engine coolant thermostat housing. Refer to
Engine Oil Cooler Pipe Replacement (A28NER/LAU)
Engine Oil Cooler Pipe Replacement (LLU/A16LET)
.
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| 15. |
Remove the fastener (4) of the wiring harness bracket (1) from the thermostat housing.
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| 16. |
Remove the 4 fasteners (3) of the thermostat housing (2).
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| Disassemble |
| 1. |
Place engine coolant thermostat housing in a vice.
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| 2. |
Remove the temperature sensor. Refer to
Engine Coolant Temperature Sensor Replacement (Thermostat Housing)
Engine Coolant Temperature Sensor Replacement (Radiator)
.
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| 3. |
Remove the heater inlet hose and the heater outlet hose from the thermostat housing.
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| Assemble |
| 1. |
Install the heater inlet hose and the heater outlet hose to the NEW thermostat housing.
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| 2. |
Install the temperature sensor. Refer to
Engine Coolant Temperature Sensor Replacement (Thermostat Housing)
Engine Coolant Temperature Sensor Replacement (Radiator)
.
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| 3. |
Remove the temperature sensor from the vice.
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| Installation Procedure |
| 1. |
Clean the sealing surface.
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| 2. |
Install a NEW gasket.
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| 3. |
Refer to
Fastener Caution
.
Install the engine coolant thermostat housing (2).
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| 4. |
Install the 4 fasteners (3) of the thermostat housing and tighten to
8 Nm (71 lb in)
.
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| 5. |
Install heater inlet hose to the heater. Refer to
Heater Inlet Hose Replacement (Diesel)
Heater Inlet Hose Replacement (LAU/A28NER)
Heater Inlet Hose Replacement (LLU/A16LET)
Heater Inlet Hose Replacement (LHU/A20NFT)
.
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| 6. |
Install heater outlet hose to the heater. Refer to
Heater Outlet Hose Replacement (Diesel)
Heater Outlet Hose Replacement (LAU/A28NER)
Heater Outlet Hose Replacement (LLU/A16LET)
Heater Outlet Hose Replacement (LHU/A20NFT)
.
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| 7. |
Install the engine oil cooler inlet pipe to the engine coolant thermostat housing. Refer to
Engine Oil Cooler Pipe Replacement (A28NER/LAU)
Engine Oil Cooler Pipe Replacement (LLU/A16LET)
.
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| 8. |
Install the air bleeding hose.
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| 9. |
Connect the electrical connector of the engine coolant temperature sensor. Refer to
Engine Coolant Temperature Sensor Replacement (Thermostat Housing)
Engine Coolant Temperature Sensor Replacement (Radiator)
.
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| 10. |
Install the engine coolant thermostat (1).
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| 11. |
Install a NEW engine coolant thermostat seal (2).
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| 12. |
Install the 4 fasteners (4) and the coolant thermostat socket (3).
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| 13. |
Install the fastener of the wiring harness bracket to the thermostat housing.
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| 14. |
Install the radiator inlet hose to the thermostat housing (5).
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| 15. |
Install the fastener (4) to the radiator inlet hose (3).
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| 16. |
Fill the cooling system. Refer to
Cooling System Draining and Filling (LAU/A28NER)
Cooling System Draining and Filling (LBS/A20DTH)
Cooling System Draining and Filling (LHU/A20NFT)
.
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| 17. |
Install both fasteners (2, 3) of the charge air cooler outlet air hose.
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| 18. |
Connect the electrical connector from the turbocharger pressure sensor.
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| 19. |
Install the charge air cooler outlet air hose fastener (1) and tighten to
9 Nm (80 lb in)
.
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