Isuzu KB P190. Service manual — part 343

6A-12 ENGINE MECHANICAL (4JK1/4JJ1)

Turbocharger Troubleshooting

Condition Possible

Cause Correction

Air leakage from intake pipe rubber
hose

Repair

Air leakage from intake cover

Repair

Clogged intercooler cooling section

Clean

Clogged air cleaner element

Clean or replace

Intake throttle valve stuck

Repair or replace

Turbine and housing contact
(Interference)

Replace

Excessive carbon deposit near
turbine exhaust port that interferes
with turbine

Clean or repair

Rough turbine shaft rotation

Repair or replace

Engine has less than normal power

Damaged turbine blade

Repair or replace

Oil leakage from turbocharger oil
seal

Repair or replace

Clogged turbocharger oil return
pipe

Repair

Clogged center housing oil
passages

Repair or replace

Blue exhaust smoke

Engine oil deterioration

Change engine oil

Gas leakage from intake or
exhaust system

Repair

Turbine and housing contact
(Interference)

Repair or replace

Damaged turbine blade

Replace

Noisy turbocharger operation

Turbine shaft bearing abrasion or
scoring

Repair or replace

Engine oil deterioration

Change engine oil

Clogged turbocharger oil feed pipe

Repair

Excessive rotating part wear

Low engine oil pressure

Repair

ENGINE MECHANICAL (4JK1/4JJ1) 6A-13

Main Data and specifications

Item

Engine model 4JK1

Engine model 4JJ1

Type

Diesel/4-cycle/water cooling-type in-line DOHC

Combustion chamber type

Direct injection type

Cylinder liner type

Liner less

Number of cylinders -cylinder
bore

× strokes

mm (in)

4-95.4 (3.76) × 87.4 (3.44) 4-95.4(3.76) × 104.9(4.13)

Displacement

cc (cu.in)

2499 (152)

2999 (183)

Compression ratio

18.3 17.5

Compression pressure

MPa (psi)/rpm

3 (435)/200

Idling speed

rpm

700

± 25

Valve clearance

Intake

0.15 (0.006) (cold)

mm (in) Exhaust

0.15 (0.006) (cold)

Ignition type

Compressed ignition

Injection order

1 - 3 - 4 - 2

Lubricating system

Lubricating type

Pressure delivery type

Oil pump type

Gear type

Volume of lubricating oil

L (qts)

8.0 (8.5)

Oil filter type

Full flow filter (cartridge type)

Oil cooling type

Built-in-type, water cooling

Cooling system

Cooling type

Water cooling type

Radiator type

Corrugated fin (pressure type)

Water pump type

Centrifugal, belt drive type

Thermostat type

Wax-type units

Thermostat valve-opening temperature

°C (°F)

85 (185)

Volume of coolant

L (qts)

M/T8.7 (9.2) A/T 8.6 (9.1) (incl. radiator)

Fuel system

Injection pump type

Fuel supply pump fuel rail type

Fuel injector type

Electronic control injector

6-hole

Fuel pump type

Into the fuel tank type

Charging system

Generator type

AC type

Power output

V-A

12 - 90

6A-14 ENGINE MECHANICAL (4JK1/4JJ1)

Item

Engine model 4JK1

Engine model 4JJ1

Regulator type

IC

Starting system

Engage magnet type

Starter type

Reduction type

Power output

V-kW

12 – 2.3

Preheat system type

Glow plug

Glow plug standard voltage/electric current

V-A

12 - 3.5

Special Tools

ILLUSTRATION

PART NO.

PART NAME

5-8840-2822-0

Valve clearance

adjust nut wrench

5-8840-2675-0

Compression gauge

5-8840-2815-0

Compression gauge

adapter

ENGINE MECHANICAL (4JK1/4JJ1) 6A-15

Engine Assembly

Removal

1. Disconnect the negative battery cable.

2. Remove the engine hood.

3. Drain the coolant.

4. Remove the starter motor.

5. Remove the transmission assembly.

Refer to removal procedure for “TRANSMISSION”

in this manual.

6. Disconnect the ECM harness connector.

7. Remove the ECM.

8. Remove the air cleaner.

• Disconnect the MAF sensor harness connector.
• Remove the intake pipe with the lid of air

cleaner box.

• Remove the air cleaner box.

RTW76ASH000401

Legend

1. ECM Harness Connector

2. ECM

3. Air Cleaner Box

4. MAF Sensor Harness Connector

9. Remove the intake hose (intercooler - intake

throttle) (Standard output).

10. Remove the intake hose (turbocharger -

intercooler) (Standard output).

Remove the harness connector.

RTW56ASH004001

Legend

1. Intake Hose (intercooler - intake throttle)

2. Intake Hose (turbocharger - intercooler)

11. Remove the intercooler (High output).

• Disconnect the BARO sensor harness

connector (2).

• Remove the two intake hoses.
• Remove the intercooler (1).

RTW76ASH000501

12. Remove the radiator upper hose.

13. Remove the engine harness clip (1).