CLOSED COOLING SYSTEM
SERVICE MANUAL NUMBER 22
90-860074-1 FEBRUARY 2002 Page 6B-25
Installation
NOTE: Always install the thermostats before the gasket. Regardless of position, ensure that
1 thermostat is a 70 degrees C (160 degrees F) thermostat and 1 is an 82 degrees C (180
degrees F) thermostat.
1. Install thermostats.
NOTE: Always use a new thermostat housing gasket.
2. Apply Perfect Seal to both sides of the new thermostat housing gasket.
3. Install the new gasket.
4. Install thermostat housing cover.
5. Torque the housing cover screws and nut evenly to 16 Nm (132 lb-in.), in a diagonal
pattern.
78274
a
b
b
c
d
e
A
a-Housing Cover
b-Thermostat (2 Different Temperatures)
c-Gasket
d-Screw With Washer (5)
e-Engine Cover Mount Threaded Spacer/ Nut (1)
6. Connect hoses.
7. Fill the closed cooling system.
8. Open seacock if equipped, or unplug and reconnect seawater inlet hose.
9. Start and operate the engine.
10. Check for leaks.
11. Check for normal engine operating temperatures.
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