Cooling System Repair 600 YRM 496
1. CYLINDER BLOCK
2. GASKET
3. THERMOSTAT
4. HOUSING
Figure 42. Thermostat
3. Test operation of thermostat. See Cooling System
700 YRM 626.
Thermostat must begin to open at 82 ±1.5
C(180
±3
F). Thermostat must be completely open at
95
C(203F).
4. Install thermostat and new gasket. Make sure print
side of gasket is toward thermostat.
5. Install thermostat housing and tighten capscrews to
12 to 18 N•m(9to13lbfft).
6. Connect hose and fill cooling system. Start engine
and check for leaks.
FAN ASSEMBLY
Remove and Disassemble
1. Loosen alternator and remove fan belt.
2. Remove capscrews for fan. Remove fan and pulley
from hub.
3. Remove capscrews that hold fan bracket to engine.
Remove fan bracket.
4. Use press to remove fan hub from shaft. Remove
snap ring, and push bearing and shaft from bracket.
See Figure 43.
1. FAN
2. PULLEY
3. HUB
4. SNAP RING
5. SHAFT
6. SUPPORT
BRACKET
7. BRACKET
Figure 43. Fan Assembly
Assemble and Install
1. Use press to install shaft and bearing in bracket.
See Figure 43. Push bearing in until it touches
bracket. Install snap ring. Install hub on shaft.
When installed, shaft must extend 2.1 mm
(0.083 in.) past hub.
2. Install bracket assembly on cylinder block. Tighten
M8capscrewsto32to47N•m (24 to 35 lbf ft).
Tighten M10 capscrews to 38 to 64 N•m(28to
47 lbf ft).
3. Install pulley and fan on hub. Tighten capscrews to
8to11N•m (6 to 8 lbf ft).
4. Install fan belt. Adjust tension of the fan belt. Check
movement of fan belt between fan and alternator.
Tension for NEW belt is correct when it moves 8 to
10mm(0.32to0.39in.)with10kg(22lb)offorce.
Tension for USED belt is correct when it moves 10
to12mm(0.39to0.47in.) with10kg(22lb)of
force. Tighten alternator when tension is correct.
WATER PUMP
Remove and Disassemble
NOTE: If either the shaft or impeller is damaged, the
complete water pump must be replaced.
1. Drain cooling system.
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