2007 ISUZU KB P190 check engine

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





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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

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

ENGINE MECHANICAL (4JK1/4JJ1) 6A-85




011RY00023
Valve Thickness
Measure the valve thickness.
If the measured value is less than the specified limit, the
valve and the valve guide must be replaced as a set.
Intake and Exhasut Valve Thickness mm (in)
Standard 1.32 (0.052)
Limit 1.1 (0.043)






014RY00020

Valve Depression
1. Install the valve (1) to the cylinder head (2).
2. Use a depth gauge or a straight edge with steel rule to measure the valve depression from the
cylinder head lower surface.
If the measured value exceeds the specified limit, the valve seat insert must be replaced.
Valve Depression mm (in)
Standard 1.8 (0.07)
Limit 2.5 (0.098)







014RY00021
Valve Contact Width
1. Check the valve contact faces for roughness and
unevenness. Make smooth the valve contact
surfaces.
2. Measure the valve contact width.
If the measured value exceeds the specified limit, the valve seat insert must be replaced.

Valve Contact W idth
mm (in)
Intake Exhaust
Standard 1.7 (0.067) 2.0 (0.079)
Limit 2.2 (0.087) 2.5 (0.098)



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ISUZU KB P190 2007

ENGINE MECHANICAL (4JK1/4JJ1) 6A-121
3. Remove the crankshaft pulley.
Note:
Do not reuse the bolt and the washer.








LNW 61ASH005301
4. Remove the crankshaft front oil seal.
• Remove only the oil seal with a screwdriver o
r
the like, avoiding damage to the oil seal contact
surface on the front cover and the shaft.
Installation
1. Install the crankshaft front oil seal. • Use the special tool to install the front oil seal.
Front Oil Seal
Installer: 5-8840-2821-0 (1)




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• Apply engine oil to the lip of the oil seal.
• W ith the seal pressed in check the dimension
of the oil seal section.
Standard Dimension = 1.5 mm (0.06 in)







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2. Install the crankshaft damper pulley.
• Install the crankshaft pulley aligning with the
key on the crankshaft.
• Hold the flywheel ring gear stationary to prevent
the crankshaft from turning when tightening the
damper pulley bolt.
Tightening torque: 294 N ⋅
⋅⋅
⋅
m (30 kg ⋅
⋅⋅
⋅
m/217 lb ft)
• Take care not to damage the crankshaft
damper pulley boss.







014R100014
3. Install the fan belt.
• Refer to “Engine Cooling”


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ISUZU KB P190 2007

6A-128 ENGINE MECHANICAL (4JK1/4JJ1)
Reassembly
1. Install the crank angle sensor rotor.
• Attach by making a rotor tooth’s running out
side into a front side.
•
Apply Loctite #262 or the equivalent to the bolt
threads (if a new bolt is used, Loctite
application is not required).
Tightening torque: 12 N ⋅
⋅⋅
⋅
m (1.2 kg ⋅
⋅⋅
⋅
m / 104 lb in)



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Legend
1. Crank Angle Sensor Rotor
2. Pin

Inspection
1. Thrust clearance
• Measure the crankshaft end play at the cente
r
journal of the crankshaft.
• Do this before removing the crankshaft bearing
caps. If the measured value exceeds the
specified limit, the crankshaft thrust bearing
must be replaced.
Axial play of the crankshaft mm (in)
Standard 0.10 (0.004)
Limit 0.30 (0.012)
Note:
Measure the thrust clearance before dismounting.






015RY00002
2. Main bearing clearance
• Remove the crank case.
Set out disassembled main bearings in the order of the numbers.
• Remove the crankshaft. Remove the main
bearings.
• Clean the crankshaft journal and upper and
lower bearings.
• Check the bearings for damage or excessive
wear.

If you find damage or excessive wear, replace the bearings in pairs.

• Place the upper bearings and the crankshaft on
the cylinder block. Install the crankshaft so that
it is horizontal.
Note:
Turn the crankshaft about 30 degrees to allow the
bearings to settle in.
• Place plastigage on the crankshaft journal as
shown.
• Place the lower bearings at original positions on
the bearing cap.

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ISUZU KB P190 2007

ENGINE MECHANICAL (4JK1/4JJ1) 6A-129




015RY00012
• Install the bearing cap and tighten bolts to the
specified tightening torque.
• Tighten the bearing cap in the sequence shown
using a torque wrench and an angle gauge.








015LX129
Tightening torque: 166 N ⋅
⋅⋅
⋅
m (16.9 kg ⋅
⋅⋅
⋅
m / 122 lb ft)
Note:
Do not turn the crankshaft after you have tightened the
bearing cap.
• Loosen the bolts and gently remove the bearing
cap.
• Measure the widest part of the Plastigage
flattened by tightening the bearing cap to
determine the clearance.
Journal oil clearance mm (in)
Standard 0.032 - 0.077 (0.0013 - 0.0030)
Limit 0.11 (0.0043)




LNW 21BSH024401
•
If the journal oil clearance exceeds the limit,
replace the main bearings altogether or the
crankshaft.
• Remove the Plastigage from the bearings and
the crankshaft.

Inspection of the crankshaft
• Check the crankshaft journal and crank pin
surfaces for wear and damage. Check the oil
seal contact surface for excessive wear and
damage.
• Check the oil port for clogging.
3. Crankshaft run-out
Carefully set the crankshaft on the V block. Slowl
y
turn the crankshaft to measure the run-out. If the
crankshaft run-out exceeds the limit, replace the
crankshaft.
Crankshaft run-out mm (in)
Standard 0.05 or less (0.0020 or less)
Limit 0.08 (0.003)


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ISUZU KB P190 2007

ENGINE MECHANICAL (4JK1/4JJ1) 6A-133






015LX115
4. Install the lower crankshaft bearing.
• Before the crankshaft bearing installation,
select the appropriate bearings in accordance
with the description in CRANK BEARING
SELECTION of INSPECTION AND REPAIR.
• Apply the recommended liquid gasket or its
equivalent to the No. 5 crankshaft bearing cap
cylinder body fitting surfaces at the points
shown in the illustration.
Note:
Be sure that the bearing cap fitting surface is completel
y
free of oil before applying the liquid gasket. ThreeBond
1207B Do not allow the liquid gasket to obstruct the
cylinder thread holes and bearings.
ThreeBond 1207B is a fast-drying liquid gasket. Tighten
the bearing caps immediately after applying the gasket.







015LX127

5. Install the bearing cap.
• Install the bearing caps with the bearing cap
head arrow mark facing the front of the engine.
The bearing cap numbers must be facing up.








015LX128
• Tighten the crankshaft bearing cap bolts to the
specified torque a little at time in the sequence
shown in the illustration.
Crankshaft Bearing Cap Torque N ⋅m (kg ⋅m / lb ft)
166 (16.9 / 122)
Check to see the crankshaft turns smoothly by
rotating it manually.
Note:
Confirm that the crankshaft turns smoothly.








015LX129
6. Install pistons and connecting rods.
Refer to "Piston and Connecting Rod".

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ISUZU KB P190 2007

ENGINE MECHANICAL (4JK1/4JJ1) 6A-137
16. Remove the piston cooling pipe.



RTW 76ASH001101
Inspection
1. Carefully remove water stains or other foreign
matters on the surface of the cylinder block.
• Be careful not to damage the cylinder block.
2. Carefully remove the liquid gasket on the crankcase mounting surface.
3. Clean up the cylinder block.
4. Visually inspect the cylinder block. • Conduct color check and hydraulic (o
r
pneumatic) test and if you find a crack or other
damage, replace the cylinder block.





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5. Cylinder block wear measurement.
• Use a cylinder indicator to measure the cylinde
r
bore at measuring point (1) in the thrust (2-2)
and axial (3-3) directions of the crankshaft.
• Measuring Point (1): 20 mm (0.79 in)
If the measured value exceeds the specified limit, the cylinder block must be replaced o
r
rebored.





012RY00010

Cylinder block bore diameter mm (in)
Standard 95.421 − 95.450 (3.7567 − 3.7579)
Limit 95.48 (3.7590)




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ISUZU KB P190 2007