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TK 61753-2-MM-EN
Figure 12. Remove Plug from Water Pump
1.
Plug
5. Verify that the amount of coolant that goes back into the system is approximately equal to the amount of coolant
that came out of the system.
6. Start the engine and monitor the coolant temperature with the unit engine coolant temperature gauge, or by using
a non-contact thermometer pointed at the thermostat housing in the location of the high water temperature switch
or sensor.
a. When the temperature reaches 150 F (66 C), shut the engine off for two minutes.
NNoottee:: This allows time for the thermostat to heat soak and open fully, ensuring that any remaining air will be
purged out of the engine block when the engine is restarted.
7. Restart the engine and run it in low speed.
a. Remove the cap from the expansion tank and slowly pour coolant into expansion tank until it is full, then
reinstall the expansion tank cap.
8. Repeat steps 6 and 7 until the coolant level stabilizes.
Engine Thermostat
For the best engine operation, use a thermostat year-round.
Coolant Level Switch
The plastic expansion tank uses a reed type coolant level switch. The coolant level switch senses the position of the
magnetic float inside the expansion tank. When the coolant level is above the switch, the float is in the upper position
and the switch is closed. When the coolant level is below the switch, the float is in the lower position and the switch is
open.
EEnnggiinnee MMaaiinntteennaannccee
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