Captiva

Thermostat Bypass Pipe Replacement - LNQ

Special Tools

BO 38185 Hose Clamp Pliers

For equivalent tools, refer toSpecial Tools .

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Remove the diesel particulate filter. Refer to Exhaust Particulate Filter Replacement : LNQ .
3. Remove the engine water outlet adaptor. Refer to Engine Water Outlet Adaptor Replacement : LNQ .



4. Disconnect the following from the water pump (5) and the thermostat inlet pipe (2).

•	Water pump inlet hose (1)

•	Thermostat bypass hose (3)

•	Engine coolant inlet hose (4)

5. Disconnect the heater outlet hose. Refer to Heater Outlet Hose Replacement : Diesel  → V6  → LE5 .
6. Remove the EGR manifold cooling return hose . Refer to Exhaust Gas Recirculation Coolant Hoses/Pipes Replacement : LNQ-EGR Pipe  → LNQ-EGR Manifold Cooling Return  → LNQ-Oil Cooler to Cooler  → LNQ-EGR Valve to Cooler .
7. Remove the engine oil cooler outlet hose. Refer to Engine Oil Cooler Outlet Hose Replacement : LNQ .



8. Remove the thermostat inlet pipe retaining bracket bolt (1).



9. Remove the thermostat bypass pipe retainer bolts (1).
10. Carefully remove the thermostat bypass pipe (2) from the engine compartment.

Caution: Refer to Fastener Caution in the Preface section.




1. Install the thermostat bypass pipe to the engine block and tighten the bolts (1) to 25 N·m (18 lb ft).



2. Install the thermostat bypass pipe bracket (2) to the engine block and tighten the bolt (1) to 25 N·m (18 lb ft).
3. Install the engine oil cooler outlet hose. Refer to Engine Oil Cooler Outlet Hose Replacement : LNQ .
4. Install the EGR manifold cooling return hose . Refer to Exhaust Gas Recirculation Coolant Hoses/Pipes Replacement : LNQ-EGR Pipe  → LNQ-EGR Manifold Cooling Return  → LNQ-Oil Cooler to Cooler  → LNQ-EGR Valve to Cooler .
5. Install the engine water outlet adaptor. Refer to Engine Water Outlet Adaptor Replacement : LNQ .
6. Connect the heater outlet hose. Refer to Heater Outlet Hose Replacement : Diesel  → V6  → LE5 .



7. Connect the following to the water pump (5) and the thermostat bypass pipe.

•	Engine coolant inlet hose (4)

•	Thermostat bypass hose (3)

•	Water pump inlet hose (1)

8. Install the diesel particulate filter. Refer to Exhaust Particulate Filter Replacement : LNQ .
9. Fill the cooling system. Refer to Cooling System Draining and Filling .