Thermostat Bypass Hose: Service and Repair

Coolant Bypass Hose Replacement (LH2)

Removal Procedure

Special Tools

J 38185 Hose Clamp Pliers

Warning

To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot.

1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) (Service and Repair)Cooling System Draining and Filling (GE 47716) (Service and Repair).
2. Remove the surge tank outlet hose assembly. Refer to Radiator Surge Tank Outlet Hose/Pipe Replacement (Service and Repair).




3. Disengage tension on the upper coolant bypass hose clamp using the J 38185 .
4. Disengage tension on the lower coolant bypass hose clamp using the J 38185 .
5. Remove the coolant bypass hose from the vehicle.

Installation Procedure

Note: Lubricate the inside diameters of the hose with clean coolant prior to installation.

1. Install the coolant bypass hose to the vehicle.




2. Position and engage tension on the lower coolant bypass hose clamp using the J 38185 .
3. Position and engage tension on the upper coolant bypass hose clamp using the J 38185 .
4. Install the surge tank outlet hose assembly. Refer to Radiator Surge Tank Outlet Hose/Pipe Replacement (Service and Repair).
5. Fill the cooling system. Refer to Cooling System Draining and Filling (Static Fill) (Service and Repair)Cooling System Draining and Filling (GE 47716) (Service and Repair).