Thermal Bypass Hose Replacement 5.3L Engine w/RPO HP2

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Drain the cooling system and engine block. Refer to Cooling System Draining and Filling .
3. If necessary, disconnect the crankshaft position (CKP) sensor electrical connector.



4. Remove the thermal bypass hose bolt.
5. Reposition the thermal bypass hose clamp.
6. Remove the thermal bypass hose from the fitting.

Important: Check that the coolant hose sealing surfaces are clean and not damaged. Confirm that the hose clamp retention is adequate and the coolant hose is not deformed. Damaged components must be replaced to avoid coolant leaks.

1. Install the thermal bypass hose to the fitting.

Notice: Refer to Fastener Notice in the Preface section.

2. Position the thermal bypass hose clamp.
3. Install the thermal bypass hose bolt.

Tighten
Tighten the bolt to 10 N·m (89 lb in).




4. If necessary, connect the CKP sensor electrical connector.
5. Fill the cooling system and engine block. Refer to Cooling System Draining and Filling .
6. Lower the vehicle.