Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 542

6A – 6 ENGINE MECHANICAL

MAIN DATA AND SPECIFICATIONS

Engine model

Item

4JA1TC 4JH1TC

Engine type

Four-cycle, overhead valve, water cooled

Combustion chamber type

Direct injection

Cylinder liner type
Timing gear train system

Dry type, chrome plated, stainless steel tube

Gear drive

No. of cylinders-bore

× stroke

mm (in)

4 – 93

× 92 (3.66 × 3.62)

4 – 95.4

× 104.9 (3.76 × 4.13)

No. of piston rings

Compression ring: 2 / Oil ring: 1

Total piston displacement

cm

3

(in

3

)

Compression ratio (to 1)

2,499 (152.4)

18.5

2,999 (183.3)

18.3

Compression pressure

kg/cm

2

(psi/MPa)

31 (441/3.0) – 200 rpm

28 (398/2.8) – 200 rpm

Engine weight

kg (lb)

Approximately 274 (604.2)

Fuel injection order

1 – 3 – 4 - 2

Fuel injection timing BTDC

deg

Not Adjustment

Specified fuel type

EC diesel fuel

Idling speed

rpm

730±25 700±25

Valve clearances (At cold): Intake

mm (in)

Exhaust

mm

(in)

Intake valves

Open at (BTDC)

deg

Close

at

(ABDC)

deg

Exhaust valves

Open at (BBDC)

deg

Close

at

(ATDC)

deg

Fuel system
Injection pump type

0.4 (0.016)
0.4 (0.016)

24.5
55.5
54.0
26.0

BOSCH VP44

(electronic controlled fuel injection pump)

Injection

nozzle

type

Injection nozzle opening pressure

Double spring type (Hole type)

(Design value)

kg/cm

2

(psi/MPa)

1st: 199(2,830/19.5)

2nd: 347(4,934/33,500)

1st: 198(2,816/19.4)

2nd: 344(4,906/33,800)

Number of injection nozzle orifices
Main fuel filter type
Lubricating system
Lubricating

method

5

Cartridge paper element and water separator

Pressure circulation

Specified engine oil (API grade)

CD

Oil pump type

Oil

filter

type

Gear

Cartridge paper element

Oil capacity

lit (US/UK gal)

6.5 (1.7/1.4) For 4

× 2

7.3 (1.9/1.6) For 4

× 4

Oil cooler type

Water cooled

4JA1TC, 4JH1TC : 4JA1, 4JH1 Engine with turbocharger and inter cooler

ENGINE MECHANICAL 6A – 7

Engine model

Item

4JA1TC 4JH1TC

Cooling system

Water

pump

type

Thermostat

type

Air cleaner type

Battery type/voltage

× No. of units

Generator capacity

V-A (kw)

Starter motor output

V-kw

Centrifugal

Wax pellet with jiggle valve

Wet paper element

95D31R-12

× 1

12 – 60 (720)

12 – 2.3

Turbocharger model

*IHI RHF4H

*IHI RHF5H

Turbine

type

Compressor

type

Radial-inflow

Radial-outflow

*IHI : Ishikawajima-Harima Heavy Industries., Ltd.

6A – 8 ENGINE MECHANICAL

TORQUE SPECIFICATIONS

STANDARD BOLTS

The torque values given in the following table should be applied whenever a particular torque is not specified.

kg·m

(lb·ft/N·m)

8.8

4.8 (4T)

(7T)

Refined

Non-Refined

9.8 (9T)

Strength

Class

Bolt
Identification

Bolt
Diameter

×

Pitch (mm)

M 6

×××× 1.0

M 8

×××× 1.25

M

10

×××× 1.25

M

12

×××× 1.25

M

14

×××× 1.5

M

16

×××× 1.5

M

18

×××× 1.5

M

20

×××× 1.5

M

22

×××× 1.5

M

24

×××× 2.0

* M 10

×××× 1.5

* M 12

×××× 1.5

* M 14

×××× 2.0

* M 16

×××× 2.0

0.60

± 0.20

(4.33

± 1.44/5.88 ± 1.96)

1.30

± 0.50

(9.40

± 3.62/12.74 ± 4.90)

2.80

± 0.70

(20.25

± 5.06/27.44 ± 6.86)

6.25

± 1.25

(45.21

± 9.04/61.25 ± 12.25)

9.75

± 1.95

(70.52

± 14.10/95.55 ± 19.11)

13.30

± 2.70

(96.20

± 19.53/130.34 ± 26.46)

19.20

± 3.80

(138.87

± 27.49/188.16 ± 37.24)

26.30

± 5.30

(190.23

± 38.33/257.74 ± 51.94)

33.90

± 8.30

(245.20

± 60.03/332.22 ± 81.34)

45.80

± 9.20

(331.27

± 66.54/448.84 ± 90.16)

2.70

± 0.70

(19.53

± 5.06/26.46 ± 6.86)

5.80

± 1.20

(41.95

± 8.68/56.84 ± 11.76)

9.10

± 1.80

(65.82

± 13.02/89.18 ± 17.64)

12.70

± 2.50

(91.86

± 18.08/124.46 ± 24.50)

0.75

± 0.25

(5.43

± 1.80/7.35 ± 2.45)

1.75

± 0.55

(12.66

± 4.00/17.15 ± 5.39)

3.75

± 0.95

(27.12

± 6.87/36.75 ± 9.31)

7.75

± 1.55

(56.06

± 11.21/75.95 ± 15.19)

11.85

± 2.35

(85.71

± 17.00/116.13 ± 23.03)

17.30

± 3.50

(125.13

± 25.32/169.54 ± 34.30)

24.90

± 5.00

(180.10

± 36.17/244.02 ± 49.00)

34.40

± 6.90

(248.82

± 49.41/337.12 ± 67.62)

46.25

± 9.25

(334.53

± 66.91/453.25 ± 90.65)

58.20

± 14.30

(420.96

± 103.43/570.36 ± 140.14)

3.70

± 0.90

(26.76

± 6.50/36.26 ± 8.82)

7.20

± 1.40

(52.08

± 10.13/70.56 ± 13.72)

11.20

± 2.20

(81.01

± 15.91/109.76 ± 21.56)

16.50

± 3.30

(119.34

± 23.87/161.70 ± 32.34)

-

2.40

± 0.70

(17.36

± 5.06/23.52 ± 6.86)

5.10

± 1.30

(36.89

± 9.40/49.98 ± 12.74)

9.65

± 1.95

(69.80

± 14.10/94.57 ± 19.11)

14.50

± 2.90

(104.88

± 21.00/142.10 ± 28.42)

20.40

± 4.10

(147.55

± 29.66/199.92 ± 40.18)

29.30

± 5.90

(211.93

± 42.67/287.14 ± 57.82)

40.40

± 8.10

(292.21

± 58.59/395.92 ± 79.38)

54.10

± 10.80

(391.30

± 78.12/530.18 ± 105.84)

70.60

± 14.10

(510.65

± 101.99/691.88 ± 138.18)

4.90

± 1.20

(35.44

± 8.68/48.02 ± 11.76)

9.10

± 1.80

(65.82

± 13.02/89.18 ± 17.64)

13.60

± 2.70

(98.37

± 19.53/133.28 ± 26.46)

19.50

± 3.90

(141.04

± 28.21/191.10 ± 38.22)

An asterisk (*) indicates that the bolts are used for female threaded parts that are made of soft materials
such as casting. Those shown in parentheses in the strength class indicate the classification by the old
standard.

FLARE NUTS

kg·m (lb·ft/N·m)

Pipe diameter mm

(in)

Torque

Pipe diameter mm

(in)

Torque

4.76 (0.187)
6.35 (0.250)
8.00 (0.315)

1.55

± 0.25 (11.2 ± 1.8/15.2 ± 2.45)

2.70

± 0.30 (19.5 ± 2.1/26.48 ± 2.94)

4.50

± 0.50 (32.5 ± 3.6/44.14 ± 4.90)

10.00 (0.394)
12.00 (0.472)
15.00 (0.591)

5.50

± 0.5 (39.7 ± 3.6/53.95 ± 4.90)

9.00

± 1.0 (65.0 ± 7.2/88.29 ± 9.80)

10.75

± 1.25 (77.7 ± 9.0/105.45 ± 12.26)

ENGINE MECHANICAL 6A – 9

SPECIAL PARTS FIXING NUTS AND BOLTS

Cylinder Head Cover, Cylinder Head, and Rocker Arm Shaft Bracket

kg·m (lb·ft/N·m)