Coolant Line/Hose: Service and Repair

WATER HOSE AND WATER PIPE

REMOVAL AND INSTALLATION

Pre-removal & Post-installation Operation:

Removal Steps 1-8:

Removal Steps 9-25:

Required Special Tool:
^ MB992042: Water Temp Sensor Wrench

REMOVAL SERVICE POINTS

[[A]] RADIATOR UPPER HOSE DISCONNECTION





Make mating marks on the radiator hose and the hose clamp. Disconnect the radiator hose.

[[B]] ENGINE COOLANT TEMPERATURE SENSOR REMOVAL





Use special tool MB992042 to remove the engine coolant temperature sensor.

INSTALLATION SERVICE POINTS

]]A[[ O-RING INSTALLATION





CAUTION
Avoid adhesion of engine oil or grease to the O-ring.

Fit the O-ring. in the water pump inlet pipe groove, wet the O-ring. circumference or the pipe mounting area inner wall, and then insert the O-ring.

]]B[[ ENGINE COOLANT TEMPERATURE SENSOR INSTALLATION





1. Apply sealant to the engine coolant temperature sensor thread.
Specified sealant: LOCTITE 262 or equivalent





2. Use special tool MB992042 to tighten the engine coolant temperature sensor to the specified torque.

Tightening torque: 30 ± 9 Nm (22 ± 7 ft-lb)

]]C[[ RADIATOR UPPER HOSE CONNECTION





1. Insert each hose as far as the projection of the water inlet fitting.
2. Align the mating marks on the radiator hose and hose clamp, and then connect the radiator hose.

INSPECTION

Water Pipe and Hose Check
Check the water pipe and hose for cracks, damage and clogs. Replace them if necessary.