REMOVAL AND INSTALLATION <4B1-EXCEPT PHEV>



Pre-removal Operation
  • Engine Coolant Draining (Refer to ).
  • Engine Upper Cover Removal (Refer to GROUP 11A - Camshaft ) .
  • Air Cleaner Assembly Removal (Refer to GROUP 15 - Air Cleaner <4B1-Except PHEV, 4J1>).
  • Thermostat Removal (Refer to ).

Post-installation Operation
  • Thermostat Installation (Refer to ).
  • Air Cleaner Assembly Installation (Refer to GROUP 15 - Air Cleaner <4B1-Except PHEV, 4J1>).
  • Engine Upper Cover Installation (Refer to GROUP 11A - Camshaft ) .
  • Engine Coolant Refilling (Refer to ).





Removal steps


1.
Vacuum pipe assembly
<<A>>
>>C<<
2.
Hose clip
<<A>>
>>C<<
3.
Radiator upper hose connection


4.
Throttle body water feed hose


5.
Water outlet fitting


6.
Water outlet fitting gasket


7.
Engine coolant temperature sensor connector


8.
Control wiring harness connection
<<B>>
>>B<<
9.
Engine coolant temperature sensor


10.
Earth cable connection


11.
Throttle body water return hose


12.
Wiring harness bracket


13.
Heater hose connection


14.
Thermostat case


15.
Thermostat case gasket


16.
Water inlet pipe

>>A<<
17.
O-ring


18.
Water pipe gasket

REMOVAL SERVICE POINTS



<<A>> HOSE CLIP/RADIATOR UPPER HOSE DISCONNECTION



1.Make mating marks on the radiator upper hose and the hose clip as shown to install them in the original position.

2.Break off the tip of hose clip claw and spread out the hose clip, then disconnect the radiator upper hose.
note If there is a hose clip claw, the hose clip cannot spread to capacity because the claw contacts the hose clip.

<<B>> ENGINE COOLANT TEMPERATURE SENSOR REMOVAL



Use special tool water temp sensor wrench (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 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 the specified sealant to the thread of the engine coolant temperature sensor.
Specified sealant: ThreeBond 1324N or equivalent
note Install the engine coolant temperature sensor immediately after applying sealant.

2.
caution After the installation, until a sufficient period of time (one hour or more) elapses, do not apply the oil or water to the sealant application area or start the engine.
Use special tool water temp sensor wrench (MB992042) to tighten the engine coolant temperature sensor to the specified torque.
Tightening torque: 30 ± 9 N·m

>>C<< RADIATOR UPPER HOSE/HOSE CLIP CONNECTION


1.
caution Never reuse the hose clip whose claw is broken off to prevent the rusting.
Make mating mark on a new hose clip in the same position as the remove one.

2.Insert the radiator upper hose until the protrusion of the water outlet fitting.
3.Align the mating marks on the radiator upper hose and hose clip.
4.Remove the hose clip claw and shorten the hose clip, then install the radiator upper hose.