Page 1425 of 6020

ENGINE MECHANICAL (4JK1/4JJ1) 6A-65
2. Install the camshaft assembly.
• Align timing mark on intake camshaft and
exhaust camshaft to idle gear D.
RTW 56ASH007001
Legend
1. Exhaust Camshaft Gear
2. Intake Camshaft Gear
3. Idle Gear D
3. Camshaft bearing caps, tighten ten bolts on one
side bank to the specified torque.
• Apply engine oil to camshaft journal and
bearing surface of camshaft bearing caps.
RTW 56ASH018401
4. Check that the alignment marks (camshaft bearing
cap and camshaft) are aligned.
RTW 56ASH006901
Legend
1.
Align mark on intake camshaft and exhaust
camshaft to mark of bearing cap
• Apply engine oil over the screw part and tighten
up the bearing cap with the prescribed torque.
Tightening torque: 18 N ⋅
⋅⋅
⋅
m (1.8kg ⋅
⋅⋅
⋅
m / 13 lb ft)
5. Remove the M5 lock bolt of fixing sub gear.
6. Adjustment of valve clearance. • Refer to installation procedure for inspection
/
adjustment of valve clearance in this manual.
7. Install the baffle plate. Tighten the bolts to the specified torque.
Tightening torque: 10 N ⋅
⋅⋅
⋅
m (1.0 kg ⋅
⋅⋅
⋅
m/87 lb in)
8. Install the cylinder head cover.
Refer to "Cylinder Head Cover".
9. Install the engine cover.
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Page 1426 of 6020
6A-66 ENGINE MECHANICAL (4JK1/4JJ1)
Torque Specifications
RTW 56AMF001701
Special Tools
ILLUSTRATION PART NO.
PART NAME
5-8840-2591-0
Camshaft gear tool
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ISUZU KB P190 2007
Page 1427 of 6020
ENGINE MECHANICAL (4JK1/4JJ1) 6A-67
Valve Stem Seal and Valve Spring
Components
RTW 56ALF001301
Legend 1. Exhaust Rocker Arm Shaft Assembly
2. Bolt (Long)
3. Bolt (Short)
4. Intake Rocker Arm Shaft Assembly
5. Fuel Injector Assembly
6. Bolt
7. Fuel Injector Clamp 8. Pin
9. Spring Lower Seat
10. Valve Stem Oil Seal
11. Valve Spring
12. Spring Upper Seat
13. Split Collar
14. Valve Stem End Cap
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Page 1428 of 6020
6A-68 ENGINE MECHANICAL (4JK1/4JJ1)
Removal
1. Remove the cylinder head.
Refer to “Cylinder Head”.
2. Remove the split collar. • Use a replacer to compress the valve spring to
remove the split collar.
Special tool
Valve spring replacer: 5-8840-2818-0 (1)
Pivot assembly: 5-8840-2819-0 (2)
RTW 56ASH012301
3. Remove the spring upper seat.
• Remove the special tool to remove the uppe
r
seat.
4. Remove the valve spring. Put the removed valve springs in order b
y
cylinder number.
5. Remove the valve stem oil seal. • Use pliers to remove the oil seal.
RTW 56ASH012401
Note:
Do not use the removed oil seal again.
6. Remove the spring lower seat.
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ISUZU KB P190 2007
Page 1429 of 6020

ENGINE MECHANICAL (4JK1/4JJ1) 6A-69
Inspection
Inspect the valve spring
Note:
Check the valve spring visually and if there is clea
r
damage or wear, replace it.
1. Free length • Measure free length of the spring and if it is
shorter than the prescribed limit, replace the
spring.
Free length of the valve spring
mm (in)
Inlet / Exhaust
Standard 49.04 (1.93)
Limit 48.15 (1.89)
LNW 21BSH017001
2. Valve spring squareness.
• Use a surface plate and a square to measure
the valve spring squareness.
If the measured value exceeds the specified limit, the valve spring must be replaced.
Valve spring squareness mm (in)
Limit 2.1 (0.083)
LNW 21BSH017101
3. Tension
• Use a spring tester to compress the spring to
the installation height. Measure tension of the
compressed spring. If the measurement is
lower than the limit, replace the spring.
Tension of the valve spring N (kg / lb)
Inlet / Exhaust
Installation length mm (in) 37.80 (1.488)
Standard 213 (21.7 / 47.8)
Limit 188 (19.2 / 42.3)
LNW 21BSH056701
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Page 1430 of 6020
6A-70 ENGINE MECHANICAL (4JK1/4JJ1)
Installation
1. Install the spring lower seat.
2. Install the valve stem oil seal. •
Apply engine oil over the peripheral part of the
valve guide and install the oil seal by using a
valve stem seal installer.
Note:
After installing the valve stem oil seal, check if it is
inserted nice and deep and the oil seal is not tilted o
r
the garter spring has not come off.
Special tool
Valve stem seal installer: 5-8840-2817-0
RTW 56ASH013701
3. Install the valve spring.
4. Install the spring upper seat.
5. Install the split collar.
• Use a replacer to compress the valve spring
and install the split collar.
Special tool
Valve spring replacer: 5-8840-2818-0 (1)
Pivot assembly: 5-8840-2819-0 (2)
RTW 56ASH012301
Note:
Move it up and down to check if it moves smoothly.
6. Install the cylinder head.
Refer to “Cylinder Head”.
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ISUZU KB P190 2007
Page 1431 of 6020
ENGINE MECHANICAL (4JK1/4JJ1) 6A-71
Special Tools
ILLUSTRATION PART NO.
PART NAME
5-8840-2818-0
Valve spring replacer
5-8840-2819-0
Pivot assembly
5-8840-2817-0
Valve stem seal installer
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ISUZU KB P190 2007
Page 1432 of 6020
6A-72 ENGINE MECHANICAL (4JK1/4JJ1)
Cylinder Head
Components
RTW 56ALF001001
Legend 1. Fuel Injector Clamp
2. Fuel Injector Assembly
3. Glow Plug
4. Intake and Exhaust Valves 5. Cylinder Head
6. Timing Chain Tension Lever
7. Timing Chain Guide
8. Timing Chain Tensioner
Note:
To avoid electric shock;
Set the switch to the 'OFF' position and disconnect the
negative battery cable before checking or repairing the
fuel injector, wiring or/and connectors. Removal
1. Remove the engine head cover.
2. Drain the engine coolant.
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ISUZU KB P190 2007