Thermostat Bypass Pipes Replacement LX9

Tools Required

J 38185 Hose Clamp Pliers

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
3. Carefully remove the throttle body air inlet duct. Refer to Air Cleaner Inlet Duct Replacement for the 3.5L engine.
4. Remove the spark plug wires at the left bank.
5. Using the J 38185 , reposition the hose clamp at the thermostat housing.
6. Remove the upper radiator hose from the housing.



7. Disconnect the heater outlet hose from the thermostat bypass pipe.
8. Remove the thermostat bypass pipe-to-throttle body nut.



9. Using the J 38185 , reposition the hose clamp at the thermostat bypass pipe.
10. Disconnect the thermostat bypass pipe hose.



11. Remove the thermostat bypass pipe-to-engine front cover bolt.
12. Remove the thermostat bypass pipe.

1. Install the thermostat bypass pipe.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the thermostat bypass pipe-to-engine front cover bolt.

Tighten
Tighten the bolt to 11 N·m (98 lb in).




3. Connect the thermostat bypass pipe hose.
4. Using the J 38185 , reposition and secure the hose clamp at the thermostat bypass pipe.



5. Install the thermostat bypass pipe to the throttle body stud.
6. Install the thermostat bypass pipe-to-throttle body nut.

Tighten
Tighten the nut to 25 N·m (18 lb ft).

7. Connect the heater outlet hose to the thermostat bypass pipe .



8. Connect the inlet hose at the thermostat housing.
9. Using the J 38185 , reposition and install the inlet hose clamp at the thermostat housing.
10. Install the spark plug wires at the left bank.
11. Install the air cleaner assembly. Refer to Air Cleaner Inlet Duct Replacement for the 3.5L engine.
12. Fill the cooling system. Refer to Cooling System Draining and Filling .
13. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .
14. Inspect for leaks.