4-38 Inspection, Maintenance and Adjustment
022-00028AE Operation and Maintenance Manual
4.
Remove coolant drain plug (Figure 71)
from engine.
5.
Open heater shutoff valve (Figure 72) to
allow coolant to drain from heater core.
6.
Install drain plug, and close drain valve
after coolant has completely drained from
system.
7.
Fill cooling system with a flushing solution.
NOTE:
When filling engine with
flushing solution, open vent
(Figure 70) on intercooler to
allow air to escape. Close vent
when solution is present.
8.
Run engine at low idle until the coolant
temperature gauge reaches the "GREEN
ZONE." Run engine for another 10 minutes.
9.
Alter allowing engine to cool.
10.
Drain flushing fluid and fill system with water.
11.
Run engine again to allow water to completely circulate.
12.
Drain water and fill system with proper anti-freeze mixture for ambient temperature. Refer to coolant
concentration table (See page 4-14).
NOTE:
When filling engine with coolant, open vent (Figure 70) on intercooler to allow air to
escape. Close vent when coolant is present.
13.
Run engine without radiator cap installed, so that all air will be purged from system. Fill radiator to a
point that is 10 - 20 mm (1/2 - 3/4'') below top of overflow pipe.
APO0170L
Figure 71
APO0110L
Figure 72
