COOLING SYSTEM
8-6
TNV IDI Service Manual
Engine Coolant System Check
ENGINE COOLANT SYSTEM
CHECK
Check the engine coolant system for leakage.
1. With the radiator properly filled, install a cooling
system tester
(Figure 8-3, (1))
.
Figure 8-3
2. Apply 10.8 - 14.8 psi (75 - 105 kPa;
0.75 - 1.05 kgf/cm²) to the cooling system. If the
pressure reading drops, the engine coolant
system is leaking. Identify the source of the leak
and repair.
ENGINE COOLANT PUMP
Disassembly of Engine Coolant
Pump
Verify the condition of the engine coolant pump
before disassembling it from the engine. Check the
engine coolant pump shaft bearing for abnormal
noise, sticking, excessive play and water leakage.
Replace the coolant pump if any of these conditions
are present.
NOTICE
If the engine coolant pump must be replaced,
replace the engine coolant pump as an assembly
only. Do not attempt to repair the engine coolant
pump or replace individual components.
1. Make sure the engine and engine coolant are
not hot.
2. Before removing the engine coolant pump or
thermostat, it will be necessary to drain the
engine coolant. Drain the coolant into a clean
container if the coolant is to be reused.
Otherwise, properly dispose of the coolant.
• Drain the coolant from the radiator. See steps
1 - 4 in
Drain, Flush and Refill Cooling System
.
3. Loosen the alternator mounting bolts. Loosen
and remove the V-belt and rotate the alternator
away from the engine and out of the way.
CAUTION
PINCH HAZARD!
Carefully rotate the alternator
toward the cylinder block while
loosening the V-belt. Failure to
comply may result in minor or
moderate injury.
4. Remove the engine coolant fan guard (if
equipped), engine coolant fan
(Figure 8-4, (1))
,
spacer
(Figure 8-4, (2))
and engine coolant
pump V-pulley
(Figure 8-4, (3))
.
Figure 8-4
5. Disconnect the coolant hoses and the
temperature switch lead wire from the engine
coolant pump.
6. Remove the engine coolant pump
(Figure 8-4, (4))
. Discard the gasket.
7. Remove the thermostat cover
(Figure 8-5, (1))
.
(1)
0000577A
(1)
(3)
(4)
(2)
0001959B
TNV_IDI_ServiceManual_A4.book 6 ページ ２０１２年２月２４日 金曜日 午前１０時２４分
