Engine Maintenance - Changing Engine Coolant
MA-18prose procedureGA series engine (section tab 'GA'). Air relief plug B is present only on the GA16DE engine.
Changing Engine Coolant
WARNING
To avoid being scalded, never change the coolant when the engine is hot.
Changing Engine Coolant
- 1Move heater "TEMP" control lever all the way to "HOT".
SMA358C - 2Open radiator drain plug at the bottom of radiator and remove radiator cap.
DI1211M - 3Remove reservoir tank, drain coolant, then clean reservoir tank. Install it temporarily.Be careful not to allow coolant to contact drive belts.
- 4Remove cylinder block drain plug and air relief plugs A and B. (Air relief plug B is only present on GA16DE.)
SMA359C - 5Close radiator drain plug.
- 6Fill radiator with water until coolant spills from drain plug hole during refill, then reinstall drain plug securely.
- 7Fill radiator with water again until coolant spills from the air relief hole during refill, then reinstall air relief plugs A and B. (Air relief plug B is present on GA16DE.) Then fill radiator and reservoir tank with water.Air relief plug: 7 - 8 N·m (0.7 - 0.8 kg-m, 5.1 - 5.8 ft-lb)
SMA386A - 8Reinstall radiator cap.
- 9Warm up engine until radiator fan operates, then race engine 2 or 3 times under no-load.Make sure that blower fan switch is "OFF".
- 10Stop engine and wait until it cools down.
- 11Repeat step 2 through step 10 until clear water begins to drain from radiator.
- 12Drain water.Apply sealant to the thread of drain plug.Drain plug torque: 34 - 44 N·m (3.5 - 4.5 kg-m, 25 - 33 ft-lb)
- 13Reinstall reservoir tank.
| Specification | Value |
|---|---|
| Air relief plugstep 7 | 7 - 8N·m0.7 - 0.8kg-m5.1 - 5.8ft-lb |
| Drain plugstep 12; apply sealant to thread | 34 - 44N·m |
| Drain plugstep 12 | 3.5 - 4.5kg-m25 - 33ft-lb |
Air relief plugstep 7
7 - 8N·m0.7 - 0.8kg-m5.1 - 5.8ft-lb
Drain plugstep 12; apply sealant to thread
34 - 44N·m
Drain plugstep 12
3.5 - 4.5kg-m25 - 33ft-lb