Isuzu KB P190. Service manual — part 523
6A-78 ENGINE MECHANICAL (C24SE)
Cooling System
Radiator
Type: Cross-flow
Radiator core surface in cm
2
: 2000
Cooling system capacity (in litres):
8
Anti-freeze Mixture
Anti-freeze Mixture
Required
Quantity
Up to-10
°°°°C
Quantity in litres
Up to-20
°°°°C
Quantity in litres
Up to-30
°°°°C
Quantity in litres
Up to-40
°°°°C
Quantity of litres
(in litres)
Water
(80%)
Anti-
Freeze
(20%)
Water
(66%)
Anti-
Freeze
(34%)
Water
(56%)
Anti-
Freeze
(44%)
Water
(48%)
Anti-
Freeze
(52%)
7.2 5.7 1.5 4.7 2.5 4.0 3.2 3.4 3.8
Cooling System (continued)
Fan
Type
Visco Clutch Fan
Number of blades
5
Distribution of blades
asymmetric
Diameter mm
Radiator cap
Boiling point
123
°C
Opening pressure kPa (bar) 120 to 135 (1.20 to 1.35)
Thermostat
Start of opening
92
°C
Fully opened
107
°C
Type Bypassed
Idle Speeds, CO Content, Ignition
Adjustment
Applicable System
Idle speed in min
-1
(rpm)
Manual
CO content
in vol. %
Ignition timing in CA BTDC (adjustment
ensues at able speed,
ignition marks must align) with TDC
sensor measuring instrument:
Closed Loop System
825
*<0.4
*** 8 to 12
Open Loop System
825
**1.0
+0.2
-0.5
*** 8 to 12
Note) * CO content adjustment not applicable.
** CO content adjustment refer to Section 6E1 (W/O catalytic converter system)
*** Ignition timing adjustment not possible.
ENGINE MECHANICAL (C24SE) 6A-79
Adjustment Values/Checking Values
Valve clearance
Inlet
Hydraulic valve lash adjustment
Outlet
No adjustment necessary
Spark plugs - electrode gap
1.0
∼ 1.1mm
Compression
The difference in compression
between the individual cylinders
in the engine must not exceed
100 kPa (1 bar).
Pressure loss
The pressure loss of an engine
in perfect condition per cylinder
is not more than max. 25%
Cylinder Head
Cylinder Head Gasket
Thickness - installed
mm
1.2
Valve seat width at cylinder head
inlet
mm
1.0 to 1.5
outlet
mm
1.7 to 2.2
Valve stem play inlet
mm
0.018 to 0.052
outlet
mm
0.038 to 0.072
Permissible valve stem to cone runout
inlet mm
0.03
outlet mm
0.33
Overall height of cylinder head
(Sealing surface to sealing surface) mm
95.5
± 0.25
Installation height
inlet and
outlet valves
mm
17.85 to 18.25
dimension "A"
Distance Gauge
5-8840-2596-0
Installation height valve guide
mm
83.50 to 83.80
Sealing surface peak-to-valley height mm
max. 0.025
6A-80 ENGINE MECHANICAL (C24SE)
Cylinder Head (continued)
Valve System
Valve lifter
valve play compensator
(hydraulic)
Valve rotators
(inlet or outlet)
outlet
Valve play
(warm or cold) inlet
mm 0
outlet
mm
0
Cylinder head bottom, face parallelism mm
0.05
Valve Dimensions
C24SE
A in mm
B in
mm
C(diameter in mm) and identification mark
D
1)
2)
Normal K
Oversize K1
0.075
Oversize K2
0.150
Oversize A
0.250
Inlet valve
104.2 103.8 41.8
7.012
6.998
7.087
7.073
7.162
7.148
7.262
7.248
44
°
Outlet valve
104.0 103.6 36.5
6.992
6.978
7.087
7.053
7.142
7.128
7.242
7.228
44
°
Valve stem
bore
- 7.050
7.030
7.125
7.105
7.200
7.180
7.300
7.280
-
1) Production
2) Customer service
The P and A department only supplies valves with a length of 103.8mm (inlet valve) and 103.6mm (outlet valve)
only
Camshaft
2.4L
Identification letter
K
Colour code
Normal size
-
0.1mm
undersize
violet
Radial runout
mm
0.03
End play
mm
0.09 to 0.21
Cam lift
Inlet and outlet valve mm
6.67
ENGINE MECHANICAL (C24SE) 6A-81
Grinding Dimension for Camshaft Bearing Position
Bearing Bearing
journal
diameter in mm
Diameter
in housing
normal -0.1mm normal -0.1mm
1 42.470
42.455
42.370
42.355
42.525
42.425
42.500
42.400
2 42.720
42.705
42.620
42.605
42.775
42.750
42.675
42.650
3 42.970
42.955
42.870
42.855
43.025
43.000
42.925
42.900
4 43.220
43.205
43.120
43.105
43.275
43.250
43.175
43.150
5 43.470
43.455
43.370
43.355
43.525
43.500
43.425
43.400
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