Coolant Line/Hose: Service and Repair

Part 1 Of 2:

REMOVAL AND INSTALLATION

REMOVAL SERVICE POINT
[[A]] RADIATOR UPPER HOSE/RADIATOR LOWER HOSE DISCONNECTION





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

INSTALLATION SERVICE POINTS
]]A[[ O-RING INSTALLATION

CAUTION: Do not let the O-ring get contaminated with grease or engine oil.





Fit an O-ring into the groove of the water inlet pipe and apply water to the circumference of the O-ring or the inside of the mounting surface of the pipe for insertion.

]]B[[ WATER INLET PIPE INSTALLATION
After installing the water outlet fitting and thermostat case assembly, tighten the mounting bolt of the water inlet pipe to the specified torque.
Tightening torque
M6: 5.0 ± 1.0 Nm (44 ± 9 inch lbs.)
M8: 13 ± 2 Nm (111 ± 22 inch lbs.)

]]C[[ RADIATOR LOWER HOSE/RADIATOR UPPER HOSE CONNECTION





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

]]D[[ WATER OUTLET FITTING AND THERMOSTAT CASE ASSEMBLY INSTALLATION
1. Remove sealant from the thermostat case and cylinder head surfaces.





2. Apply a bead of the sealant to the cylinder head mating surface of the thermostat case as shown.
Specified sealant: 3M(TM) AAD Part No. 8672, 3M(TM) AAD Part No. 8679/8678 or equivalent

NOTE: Install the water outlet tiffing and thermostat case assembly within 15 minutes after applying liquid gasket.

3. Install the water outlet fitting and thermostat case assembly to the cylinder head.

CAUTION: Then wait at least one hour. Never start the engine or let engine oil or coolant touch the adhesion surface during that time.

4. Tighten the thermostat case mounting bolts to the specified torque.
Tightening torque: 23 ± 4 Nm (17 ± 3 ft. lbs.)

INSPECTION
WATER PIPE AND HOSE CHECK
Check the water pipe and hose for cracks, damage and clogs. Replace them if necessary.