Cooling System; Valve Clearance Adjustment - Isuzu A-4BG1 Workshop Manual

MAINTENAiiiCE 2-7
Agitating rod
Thermometer
- Wood piece
COOLING SYSTEM
Cooling Fan Drive Belt
II
4
Adjustment
1. Check the cooling fan drive belt for cracking and
ICI
e
other damage.
2. Check the drive belt tension by exerting a force of 10
kg (221b) midway between the fan pulley @ and the
generator 0.
3. Adjust the belt tension by loosening the alternator
mounting bolt and the generator adjusting bolt and
pivoting the generator.
Be sure to retighten the bolts after adjusting the belt
tension.
mm (in)
*
,
Cooling Fan Drive
Belt Deflection
8-O-12.0 (0.3-0.5)
4
Thermostat
Inspection
ICI 4B
. .
ISI .
Visually inspect the thermostat.
Replace the thermostat if excessive wear or damage is
discovered during inspection.
Measure the valve lift.
mm (in)
I
Amount of Valve Lift
at 95OC (203°F)
10.0 (0.39)
"C( "F)
c
Valve Opening
Temperature
80-84 (176483)
VALVE CLEARANCE AND ADJUSTMENT
Note:
The cylinder head bolts were previously tightened with
the "Angular Tightening Method". Therefore, it is not
onecessary to retighten the cylinder head bolts before
adjusting the valve clearance.