PERIODIC MAINTENANCE
84
1. Allow engine and coolant to cool.
2. Remove the radiator cap (Figure 19, (1)).
3. Remove the drain plug or open the drain valve
(Figure 19, (2)) at the bottom of the radiator
and drain the engine coolant.
Figure 19
4. Drain the coolant from the engine block.
• On models not equipped with an oil cooler,
remove the coolant drain plug (Figure 20, (1))
from the engine block.
Figure 20
5. After draining the engine coolant, flush the
radiator and engine block to remove any rust,
scale and contaminants. Then reinstall and
tighten the drain plug or close the drain valve in
the radiator. Reinstall and tighten the engine
block drain plug.
6. Fill radiator and engine with engine coolant.
See Filling Radiator with Engine Coolant on
page 47.
■
Check and adjust intake/exhaust valve
clearance
Improper intake/exhaust valve clearance will cause
the engine to run noisily, resulting in poor engine
performance and engine damage. Proper
adjustment is necessary to maintain the correct
timing for opening and closing the valves. See your
Isuzu Distributor to inspect and adjust the
intake/exhaust valve clearance.
FULL
LOW
K0000074A
1
2
1
K0000027B
TNV_OperationManual_T4(under 19kW).book Page 84 Wednesday, June 17, 2015 11:23 AM
