Page 1416 of 6020
6A-56 ENGINE MECHANICAL (4JK1/4JJ1)
• Align the oil hole of the cylinder body (2) with
the oil hole of the idle gear A shaft (3).
• Install the flange so that the front mark (1) face
toward the front.
• Install the idle gear A and idle gear A flange,
idle gear A shaft at the position shown in the
figure.
•
Apply engine oil over the part where the gear of
the idle gear shaft is to be put together.
•
Apply engine oil to the bolt screw thread and
seat, and temporarily tighten together with the
flange (tighten fully in later process).
LNW 71BSH000501
• Attach, aligning with the gear crank: idle A and
timing mark.
RTW 56ALH000301
5. Tighten the bolts of idle gear A and idle gear C to
the specified torque.
Tightening torque: idle gear A 32 N ⋅
⋅⋅
⋅
m (3.3 kg ⋅
⋅⋅
⋅
m / 24 lb ft)
idle gear C 59 N ⋅
⋅⋅
⋅
m (6.0 kg ⋅
⋅⋅
⋅
m / 43 lb ft)
RTW 56ASH011701
Legend
1. Idle Gear A Bolt
2. Idle Gear C Bolt
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
Page 1417 of 6020

ENGINE MECHANICAL (4JK1/4JJ1) 6A-57
6. Remove the M6 bolt from the idle gear A.
7. Install the gear case cover. • Apply the liquid gasket (ThreeBond TB-1207B
or equivalent).
RTW 56ASH020101
Legend
1. Apply the liquid gasket
• Install the gasket in slot of the gear case cover.
• Tighten the bolts to the specified torque.
Tightening torque: 8 N ⋅
⋅⋅
⋅
m (0.8 kg ⋅
⋅⋅
⋅
m / 69 lb in)
RTW 56ASH012101
8. Install the vacuum pump.
Tightening torque: 25 N ⋅
⋅⋅
⋅
m (2.5 kg ⋅
⋅⋅
⋅
m / 18 lb ft)
• Install the oil pipe (feed side and return side) o
f
vacuum pump.
• Install the vacuum pipe bracket and vacuum
pipe.
9. Install the power steering pump. • Tighten the nuts to the specified torque.
Tightening torque: 25 N ⋅
⋅⋅
⋅
m (2.5 kg ⋅
⋅⋅
⋅
m / 18 lb ft)
• Connect the bracket (1) of power steering oil
hose.
LTW 56ASH000101
10. Install the crank pulley.
Tightening torque: 294 N ⋅
⋅⋅
⋅
m (30.0 kg ⋅
⋅⋅
⋅
m / 217 lb ft)
11. Install the A/C compressor drive belt and fan belt.
Refer to drive belt tension check procedure fo
r
Heating and air conditioning and Engine cooling in
this manual.
12. Install the cooling fan.
13. Install the fan guide.
14. Install the radiator upper hose.
15. Replenish the engine coolant.
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
Page 1423 of 6020

ENGINE MECHANICAL (4JK1/4JJ1) 6A-63
LNW 21BSH020501
8. Check if the camshaft is runout.
• Place the camshaft on a V block to measure a
runout with a dial gauge.
• Rotate the camshaft slowly to measure ho
w
much the dial indicator shook. If it exceeds the
limit, replace the camshaft.
Runout of the camshaft mm (in)
Limit 0.05 (0.0020)
LNW 21BSH020601
9. Measure a camshaft journal oil clearance.
a. Measure an inside diameter of the camshaft bearing with a dial gauge.
b. Read the difference between the inside diameter of the camshaft bearing and the
diameter of the camshaft journal.
If the measured oil clearance exceeds the limit, replace the camshaft bearing.
Clearance of the journal part mm (in)
Standard 0.025
− 0.087
(0.0010 − 0.0034)
Limit 0.15 (0.0059)
LNW 21BSH054601
Reassembly
1. Install the dowel pin.
2. Install the camshaft gear. • Align the knock pin with the slot in the camshaft
gear. Use a press to install the camshaft gea
r
to the camshaft.
RTW 56ASH006601
Legend
1. Camshaft
2. Dowel Pin
3. Camshaft Gear
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
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.
BACK TO CHAPTER INDEX
TO MODEL INDEX
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
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
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.
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
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”.
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
Page 1436 of 6020
6A-76 ENGINE MECHANICAL (4JK1/4JJ1)
24. Disconnect the Front drive shaft (1). (4×4)
RTW 76ASH002301
25. Remove the catalyst converter.
RTW 56ALH000201
26. Remove the A/T oil cooler pipe bracket (A/T).
RTW 56ASH025101
Legend
1. A/T Oil Cooler Pipe Bracket
27. Remove the turbocharger water return pipe and
hose.
RTW 56ASH019001
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007