2004 ISUZU TF SERIES alternator belt

ENGINE MECHANICAL (C24SE) 6A-39







Camshaft Housing, Check for Plane Surface
Clean
Sealing surfaces.

Inspection
Check length and width of sealing surface for deformation and
diagnosis for warpage and use straight edge feeler gauge.

Measure
Height of camshaft housing (sealing surface to sealing
surface).
Dimension I: (74.0 mm)



Cylinder Head, Removal and Installation
Important
Only remove cylinder head with engine cold (room
temperature).




Removal
1. Remove the alternator, power steering and V-belts.



Removal
2. Loosen the fastening bolts from alternator.
3. Loosen the lower alternator fastening bolt by swinging
the alternator to the rear.



Removal
4. Remove the front toothed belt cover.
5. Remove the toothed belt from camshaft pulley.
See operation "Timing Check and Adjust".

6A-42 ENGINE MECHANICAL (C24SE)


Installation
1. Install the fastening bolts.
2. Loosen the lower alternator fastening bolt.
3. Install the alternator, power steering and V-belts.



Cylinder Head, Disassemble and Assemble
Removal
1. Remove the hydraulic valve lifters.
Lay aside in installation positions.
2. Remove the spark plugs, exhaust manifold and intake
manifold from cylinder head.




Removal
1. Mark valves.
2. Remove the tension valve springs with 5-8840-2594-0
(1).
3. Remove valve keepers, valve spring cap and valve
spring.



Removal
1. Remove the valve and valve stem seal.
2. Remove the valve spacer ring (1-exhaust) and valve
spring seat (2-intake).
3. Remove valve from cylinder head.

Clean
Sealing surfaces.

ENGINE MECHANICAL (C24SE) 6A-67

Coating sealing surfaces with Silicone Grease
Installation
1. Install water pump to cylinder block with new rubber O-
ring.
2. Apply tension to toothed belt according to the
corresponding operation.
3. Install coolant hoses.
4. Fill cooling system and bleed according to the
corresponding operation.










Alternator
Removal
1. Remove ground cable from battery.
2. Remove cable connection from alternator and V-belt.
3. Remove alternator from retaining strap and lower
fastening.

Installation
1. Install alternator by tightening firmly by hand.
2. Install V-belt and apply tension according to the
corresponding operation.
3. Install cable connections to alternator.
4. Install ground cable to battery.




Starter
Removeal
1. Remove cable connections from starter.
2. Remove upper bolt of transmission side.
3. Remove lower bolt of engine side.

Tighten (Torque)
Starter to cylinder block:
Engine side - 51 N

m (5.2 kgf

m)
Transmission side - 75 N

m (7.6 kgf

m)

Starter support to cylinder block - 25 N

m (2.5 kgf

m)

Re-connect cables.

6A-68 ENGINE MECHANICAL (C24SE)
V-belt Tension of Alternator

Measure
Measure V-belt tension of alternator.
Permitted values for new V-belt are approx. 311-489N (31-50
kgf).
Note:
V-belt to deflection as loaded with 10kg : 8-12mm.





Adjust
Adjust V-belt tension by loosening clamping bracket and lower
alternator bracket and moving alternator.

Tighten (Torque)
Clamping bracket to alternator - 35 N

m (3.6 kgf

m)
Lower alternator bracket - 25 N

m (2.6 kgf

m)

V-Belt Tension of Power Steering Pump
Measure
Measure V-belt tension of power steering pump. Permitted
values for new belt are approx. 578-712N (59-73 kgf) and 534-
667N (54-68 kgf) for used belt.
Note:
V-belt to deflection as loaded with 10kg : 8-12mm.





Adjust
Adjust V-belt tension by loosening clamping bolt, lower pump
bracket, and adjusting nuts and moving steering pump.

Tighten (Torque)
Adjusting nuts - 18 N

m (1.8 kgf

m)
Clamping bolt - 25 N

m (2.6 kgf

m)
Lower pump bracket - 26 N
m (2.6 kgf
m)

ENGINE MECHANICAL (C24SE) 6A-87
Recommended Torque Values
Nm (kgfm)

Bearing cover to cylinder block ....................................................................................... 60
1) 6.1 +40
to 50

Bracket for alternator to cylinder block ............................................................................ 40 4.1
Bracket for engine damping block to transmission ......................................................... 60
2) 6.1
Bracket for engine damping block to engine block ......................................................... 60 6.1
Bracket for pump/compressor to engine block ............................................................... 35 3.6
Camshaft housing cover to housing ................................................................................ 8 0.8
Camshaft timing gear to camshaft .................................................................................. 50 5.1
Clamping bracket for alternator to intake manifold ......................................................... 25 2.5
Clamping bracket to alternator ........................................................................................ 25 2.5
Con-rod bearing cap to con-rod ...................................................................................... 35
1) 3.5 +45
to 60

Crankshaft pulley bolts .................................................................................................... 20 2.0
Cylinder head to cylinder block ........................................................................................ 25
1)2) 2.5 +90
+90

+90

Engine damping block to engine bracket ........................................................................ 8.5 8.7
Engine damping block to side member ........................................................................... 52
1) 5.3
Exhaust manifold to cylinder head .................................................................................. 22 2.2

1) Use new bolts
2) Use new locking plates


Recommended Torque Values
Nm (kgfm)

Flywheel to crankshaft ..................................................................................................... 65
1) 6.6 +30
to 45

Front exhaust pipe to exhaust manifold .......................................................................... 25 2.5
Guide sleeve for pressure bearing to transmission ......................................................... 22 2.2
Intake manifold to cylinder head ...................................................................................... 22 2.2
Lower alternator bracket ................................................................................................. 25 2.5
Oil drain plug to oil pan .................................................................................................... 45 4.6
Oil intake pipe bracket to cylinder block .......................................................................... 6
2) 0.6
Oil intake pipe to oil pump ............................................................................................... 8 0.8
Oil pan to cylinder block .................................................................................................. 8
2)3) 0.8
Bearing bridge to cylinder block ...................................................................................... 8 2)3) 0.8
Oil pressure switch to oil pump ....................................................................................... 30 3.2
Pump for power steering (ribbed V-belt) to engine block ................................................ 30 3.2
Spark plugs in cylinder head ........................................................................................... 20 2.3
Starter support to cylinder block ...................................................................................... 25 2.5
Starter to cylinder block - engine side ............................................................................. 45 4.6
Starter to cylinder block - transmission side .................................................................... 75 7.6
Thermostat housing to cylinder head .............................................................................. 15 1.5
Toothed belt drive gear to crankshaft .............................................................................. 130
1) 13.3
Toothed belt front cover .................................................................................................. 4 0.4
Toothed belt rear cover ................................................................................................... 6 0.6
Toothed belt tension roller to oil pump ............................................................................ 20 2.3
(M10) ............................................................................ 45 4.6
Transmission to engine block ......................................................................................... 76 7.7
(M12) ............................................................................ 60 6.1
Water pump to cylinder block .......................................................................................... 17 1.7

1) Use new bolts
2) Use Locking Compound
3) Maximum installation time - 10 minutes

6D3-8 STARTING AND CHARGING SYSTEM

General On-Vehicle Inspection
The operating condition of charging system is indicated by the
charge warning lamp. The warning lamp comes on when the
starter switch is turned to "ON" position. The charging system
operates normally if the lamp goes off when the engine starts.
If the warning lamp shows abnormality or if undercharged or
overcharged battery condition is suspected, perform diagnosis
by checking the charging system as follows:
1. Check visually the belt and wiring connector.
2. With the engine stopped, turn the stator switch to "ON"
position and observe the warning lamp.
If lamp does not come on:
Disconnect wiring connector from generator, and ground
the terminal "L" on connector side.
If lamp comes on:
Repair or replace the generator.




Generator
Removal
1. Disconnect battery ground cable.
2. Move drive belt tensioner to loose side using wrench then
remove drive belt.
3. Disconnect terminal "B" wiring connector and connector.
4. Remove generator assembly.

Generator Power and Circuit Diagram



Inspection
Legend
1 Load resistor, set parallel to battery
2 Battery
3 Voltmeter
4 Ammeter
5 Ignition Lock
6 Charge Telltale
7 Generator

1. Disconnect battery.
2. Close off connecting cable from alternator terminal "B+".
3. Set ammeter (measuring range 100A) in disconnected line.
4. Connect controllable load resistor to battery terminal.
5. Set resistor in front of connection to "O"; connect first to
battery, then to resistor.
6. Connect tachometer.
7. Connect oscilloscope according to manufacturer's
instructions.
8. Connect battery.
9. Start engine and read off resulting current at various engine
speeds.

STARTING AND CHARGING SYSTEM 6D3-9



Generator Power
1. Adjust load resistor, if the required load currents are not
attained.
2. The shape of the voltage curves on oscilloscope curve
should be regular.
3. Test value: 5 to 7A.
4. If the required minimum current intensity is not attained, o
r
if the oscilloscope picture shows variations, the alternator
should be overhauled.

Regulated Voltage Circuit Diagram


Legend
1 Battery
2 Ignition Lock
3 Charge Telltale
4 Resistor, for attainment of load current with the battery set in
series
5 Voltmeter
6 Ammeter
7 Generator




Installation
1. Install generator assembly and bring generator assembly to
the position to be installed.
2. Install generator assembly and tighten to the specified
torque.
Torque:
Long bolt: 35 N




m (3.6 kgf




m)
Short bolt: 20 N





m (2.0 kgf





m)
3. Connect wiring harness connector.
4. Move drive belt tensioner to loose side using a wrench, then
install drive belt to normal position.
5. Reconnect battery ground cable.