Thermostat Bypass Pipes Replacement

Removal Procedure

- Tools Required
- J 38185 Hose Clamp Pliers





1. Drain the cooling system. Refer to Draining and Filling Cooling System.
2. Carefully remove the throttle body air inlet duct.
3. Remove the LH engine mount strut. Refer to Engine Mount Strut Replacement (Left) or Engine Mount Strut Replacement (Right).
4. Disconnect the left bank spark plugs wires. Refer to Spark Plug Wire Harness Replacement in Powertrain Management.
5. Use the J 38185 in order to reposition the radiator inlet hose clamp at the thermostat housing.
6. Disconnect the radiator inlet hose at the thermostat housing.





7. Disconnect the heater outlet hose (2) from the thermostat bypass pipe.
8. Disconnect the throttle body inlet (3) and outlet (4) hoses from the thermostat bypass pipe.





9. Remove the thermostat bypass pipe nut.





10. Use the J 38185 in order to reposition the hose clamp at the thermostat bypass pipe.
11. Disconnect the thermostat bypass pipe hose.





12. Remove the thermostat bypass pipe bolt.
13. Remove the thermostat bypass pipe.

Installation Procedure





1. Install the thermostat bypass pipe.

Notice: Refer to Fastener Notice in Service Precautions.

2. Install the thermostat bypass pipe bolt.
Tighten the thermostat bypass pipe bolt to 11 Nm (98 inch lbs.).





3. Connect the thermostat bypass pipe hose.
4. Use the J 38185 in order to reposition and install the hose clamp at the thermostat bypass pipe.





5. Install the thermostat bypass pipe nut.
Tighten the thermostat bypass pipe nut to 25 Nm (18 ft. lbs.).





6. Connect the heater outlet hose (2) to the thermostat bypass pipe.
7. Connect the throttle body inlet (3) and outlet (4) hoses to the thermostat bypass pipe.





8. Connect the inlet hose at the thermostat housing.
9. Use the J 38185 in order to reposition and install the inlet hose clamp at the thermostat housing.
10. Install the left bank spark plugs wires. Refer to Spark Plug Wire Harness Replacement in Powertrain Management.
11. Install the LH engine mount strut. Refer to Engine Mount Strut Replacement (Left) or Engine Mount Strut Replacement (Right).
12. Carefully install the throttle body air inlet duct.
13. Fill the cooling system. Refer to Draining and Filling Cooling System in Cooling System.
14. Inspect for leaks.