MQ Power WHISPERWATT DCA10SPX4 Operation Manual page 37

DRAINING THE ENGINE COOLANT
WARNING
DO NOT remove the pressure cap from the
radiator when the engine is hot! Wait until
the coolant temperature is below 120°F
(50°C) before removing the pressure cap.
Heated coolant spray or steam can cause
severe scalding and personal injury.
1. Remove the radiator pressure cap (Figure 47) only
when the coolant temperature is below 120°F (50°C).
CORRECT
180
140
220
°F
100 260
WATER TEMP
PRESSURE
CAP
Figure 47. Radiator Pressure Cap Removal
2. Remove the coolant drain bolt and O-ring (Figure 48),
then allow the coolant to drain into a suitable container.
Figure 48. Draining The Engine Coolant
DCA10SPX4/DCA10SPXU4 • OPERATION MANUAL — REV. #2 (10/11/22) — PAGE 37
180
140
220
°F
100
260
WATER TEMP
COOLANT
DRAIN BOLT
AND O-RING
3. After the coolant has completely drained, reinstall the
coolant drain bolt and O-ring.
4. Reinstall the radiator pressure cap and tighten securely.
FLUSHING OUT THE RADIATOR
AND REPLACING THE COOLANT
WARNING
DO NOT remove the pressure cap from the
radiator when the engine is hot! Wait until
the coolant temperature is below 120°F
(50°C) before removing the pressure cap.
Heated coolant spray or steam can cause
severe scalding and personal injury.
1. Remove the radiator pressure cap (Figure 47) only
when the coolant temperature is below 120°F (50°C).
2. Remove the coolant drain bolt and O-ring (Figure 48),
then allow the coolant to drain into a suitable container.
3. If equipped, remove the overflow tank. Drain and clean
the overflow tank.
4. Replace the overflow tank if necessary.
5. Check all hoses for softening and kinks. Check all
clamps for signs of leakage.
6. Flush the radiator by running clean tap water through
the radiator until all signs of rust and dirt are removed.
DO NOT clean the radiator core with any objects, such
as a screwdriver.
7. Replace with coolant as recommended by the engine
manufacturer. Refer to Table 2 for engine coolant
capacity.
8. Reinstall the coolant drain bolt and O-ring and tighten
securely.
MAINTENANCE