TM 5-3810-307-24-2-1
Clean the gasket surfaces.
NOTE
Do not let any debris fall into the thermostat
cavity when cleaning gasket surfaces.
CAUTION
Always use the correct thermostat and never
operate the engine without a thermostat. An
incorrect thermostat can cause the engine to
overheat or run too cold. The engine will
overheat if operated without a thermostat
because the coolant flows back to the inlet of
the water pump instead of through the
radiator for cooling.
A-16 C-1