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Isuzu KB P190. Manual - part 523

6A-78 ENGINE MECHANICAL (C24SE)

Cooling System

Radiator

Type: Cross-flow

Radiator core surface in cm

: 2000

Cooling system capacity (in litres):

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

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

°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

1.2

Valve seat width at cylinder head

inlet

1.0 to 1.5

outlet

1.7 to 2.2

Valve stem play inlet

0.018 to 0.052

outlet

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

17.85 to 18.25

dimension "A"

Distance Gauge

5-8840-2596-0

Installation height valve guide

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

Cylinder head bottom, face parallelism mm

0.05

Valve Dimensions

C24SE

A in mm

B in
mm

C(diameter in mm) and identification mark

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

Outlet valve

104.0 103.6 36.5

6.992
6.978

7.087
7.053

7.142
7.128

7.242
7.228

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

Colour code

Normal size

0.1mm

undersize

violet

Radial runout

0.03

End play

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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