Isuzu N-Series. Service manual — part 477
Engine Mechanical (4HK1-TC) 6A-13
Main Data and Specifications
Item
Engine model 4HK1-TCS
Engine model 4HK1-TCN
Type
Diesel/4-cycle/water cooling
type in-line OHC
Diesel/4-cycle/water cooling
type in-line OHC
Combustion chamber type
Direct injection type
Direct injection type
Cylinder liner type
Dry type
Dry type
Number of cylinders -cylinder
bore
× strokes
mm (in)
4-115 (4.53)
× 125 (4.92)
4-115 (4.53)
× 125 (4.92)
Displacement
cc (cu.in)
5193(317)
5193(317)
Compression ratio
17.5
17.5
Compression pressure
MPa (kg/cm
2
/
psi)/rpm
2.60 – 2.89 (26.5 – 29.5/377 –
419)/220
2.60 – 2.89 (26.5 – 29.5/377 –
419)/220
Idling speed
rpm
650
650
Valve clearance
Intake
0.4 (0.016) (cold)
0.4 (0.016) (cold)
mm (in) Exhaust
0.4 (0.016) (cold)
0.4 (0.016) (cold)
Ignition type
Compressed ignition
Compressed ignition
Injection order
1 - 3 - 4 - 2
1 - 3 - 4 - 2
Lubricating system
Lubricating type
Pressure type
Pressure type
Oil pump type
Gear type
Gear type
Volume of lubricating oil
Liters (US/Imp
gal.)
13.0 (3.43/2.86)
13.0 (3.43/2.86)
Oil filter type
Full flow filter (cartridge type)
Full flow filter (cartridge type)
Oil cooling type
Built-in-type, water cooling
Built-in-type, water cooling
Cooling system
Cooling type
Water cooling type
Water cooling type
Radiator type
Corrugated fin(pressure type)
Corrugated fin(pressure type)
Water pump type
Centrifugal, belt type
Centrifugal, belt type
Thermostat type
2 wax-type units
2 wax-type units
Thermostat valve-opening
temperature
°C (°F)
82 (180), 85 (185)
82 (180), 85 (185)
Volume of coolant
Liters (US/Imp
gal.)
17.6 (4.65/3.87) (incl. radiator) 17.6 (4.65/3.87) (incl. radiator)
Fuel system
Injection pump type
Electronic control common rail
type
Electronic control common rail
type
Governor type
Electronic type
Electronic type
Timer type
Electronic type
Electronic type
Injection nozzle type
Multi-hole type
7-holes
φ0.14 mm (0.0055 in)
inside diameter
Multi-hole type
7-holes
φ0.14 mm (0.0055 in)
inside diameter
6A-14 Engine Mechanical (4HK1-TC)
Special Tool
Charging system
Generator type
AC type
AC type
Power output
V-A
24 - 80, 24 - 60, 24 - 50
24 - 80, 24 - 60, 24 - 50
Regulator type
IC
IC
Starting system
Starter type
Reduction type
Reduction type
Power output
V-kw
24 - 4.5
24 - 4.5
Preheat system type
Glow plug
Glow plug
Glow plug standard voltage/
electric current
V
24
24
Item
Engine model 4HK1-TCS
Engine model 4HK1-TCN
Illustration
Tool Number /
Description / Remarks
5-8840-2008-0
Compression Gauge Set
(J-26999-12 /
Compression Gauge,
EN-46722 /
Gauge Adapter)
5884020080
Engine Mechanical (4HK1-TC) 6A-15
Engine Assembly
Removal
1. Remove a minus (-) terminal of the battery.
2. Drain the coolant.
3. Remove the starter motor.
• Disconnect the front frame harness connector
in the vicinity of the control box of the
transmission and remove each clip that fixes
the harness.
• Remove 2 bolts that fasten the starter and
remove the starter from the clutch housing.
• Fix the starter motor with wire, for instance, in a
place that does not get in the way in removing
the transmission.
4. Remove the transmission assembly.
Refer to “Transmission Assembly”
5. Remove the charge air hose (between
turbocharger and inlet pipe).
Legend
1. Duct
2. Charge Air Hose
6. Remove the inlet hose (between air cleaner and
turbocharger).
7. Remove the charge air hose (between intercooler
and inlet duct).
• Remove the connector of the boost pressure
sensor.
Legend
1. Charge Air Hose
2. Boost Pressure Sensor
8. Remove the upper hose of the radiator.
• Remove the band clip and VSV vacuum hose.
9. Remove a bracket of the fan guide.
10. Remove the fan assembly.
• Remove the nuts and pull them out upward.
11. Remove the heater hoses.
N6A6010E
N6A6011E
N6A6012E
6A-16 Engine Mechanical (4HK1-TC)
• Remove 2 hoses on the engine side.
12. Remove the engine harness.
• Remove the ECM.
• Disconnect the two main harness connectors
from the ECM (For SLD equipped, disconnect
the unsealed connector.)
• Remove the engine ground cable.
13. Remove the A/C compressor.
• Remove the drive belt.
• Remove the connector.
• Remove the A/C compressor and fix it with
wire, for example, to an appropriate place along
with hoses and others.
Legend
1. Fixing Bolt
2. Connector
3. Bracket
4. A/C Compressor
14. Remove the AC generator harness.
• Remove the terminal B cable and harness
connector from the generator.
15. Remove the vacuum hose on the vacuum pump
side.
16. Remove a bracket by the blow-by separator and
remove the harness connector and HBB oil hose
bracket.
17. Remove the blow-by separator hose.
18. To prevent oil from flowing out when the hydraulic
booster brake hose is removed, remove the
fastening bolts for the hydraulic booster brake tank
to lower the tank.
19. Remove one side of the hydraulic booster brake
hose on the high-pressure side.
20. To prevent oil from flowing out when the power
steering oil hose is removed, remove the fastening
bolts for the power steering reserve tank to lower
the tank.
21. Remove the power steering oil hose.
22. Remove the lower hose of the radiator on the
engine side.
23. Hang wire on the engine hanger and hoist to lift up
the engine slightly.
24. Remove the front exhaust pipe.
• Remove the front exhaust pipe from the turbo
and exhaust brake.
25. Remove the fuel hose on the feed and return
sides.
26. Remove the engine mount.
• Remove the fastening bolts for the engine
mount on the chassis frame side.
27. Remove the engine assembly.
• Remove the cab back cover.
Legend
1. Screw
2. Cab Back Cover
3. Nut
N6A6013E
N6A6014E
N6A6015E
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