2NZ-FE COOLING  COOLING SYSTEM  ON-VEHICLE INSPECTION  


CAUTION / NOTICE / HINT

CAUTION:

Be sure that the ignition switch is off when working near the fan or radiator grille sub-assembly. With the ignition switch ON, the fan may automatically start to operate if the engine coolant temperature becomes high and/or the air conditioning is turned on.


PROCEDURE

Hide 1.INSPECT FOR COOLANT LEAK

CAUTION:

Do not remove the radiator cap sub-assembly while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.


a.

Remove the radiator cap sub-assembly.


b.
A156261
1.844,1.281 1.844,0.854 false 1.802,1.313 1.99,1.5 0.188,0.188 10 true *a
*a Radiator Cap Tester


Fill the radiator assembly with engine coolant, and then install a radiator cap tester.


c.

Warm up the engine.


d.

Pump the radiator cap tester to 108 kPa (1.1 kgf/cm2, 15.7 psi), and then check that the pressure does not drop.

·

If the pressure drops, check the hoses, radiator assembly and engine water pump assembly for leaks.

·

If there are no signs of external engine coolant leaks, check the heater core, cylinder block sub-assembly and cylinder head sub-assembly.



e.

Remove the radiator cap tester.


f.

Install the radiator cap sub-assembly.


Hide 2.INSPECT ENGINE COOLANT LEVEL IN RESERVOIR TANK

a.
A311044
1.719,1.083 2.99,1.083 false 1.74,1.74 3.01,1.74 false 3.052,1 3.365,1.156 0.313,0.156 10 false *a 3.063,1.677 3.375,1.833 0.313,0.156 10 false *b
*a Full Line
*b Low Line


Check that the engine coolant level is between the low line and full line when the engine is cold.

If the engine coolant level is low, check for leaks and add engine coolant to the full line.

NOTICE:

Do not substitute plain water for engine coolant.



Hide 3.INSPECT ENGINE COOLANT QUALITY

CAUTION:

Do not remove the radiator cap sub-assembly while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.


a.

Remove the radiator cap sub-assembly.


b.

Check if there are any excessive deposits of rust or scale around the reserve tank cap and radiator reserve tank filler hole. Also, the engine coolant should be free of oil.

If excessively dirty, replace the engine coolant.


c.

Install the radiator cap sub-assembly.