Isuzu KB P190. Manual - part 675

Engine Mechanical – V6 

Page 6A1–221 

 

7 

Remove connecting rod guide pin set, Tool No.  
EN-46121 (1) from the connecting rod bolt holes. 

Figure 6A1 – 406 

Connecting Rod Bearing Clearance Measurement Procedure 

N O T E  

Before final assembly, check the clearance of the 
new connecting rod bearings. 

1 

Place a length of fresh, room temperature plastic 
gauging material all the way across the connecting 
rod bearing journal. 

2 

Install the connecting rod bearing into the connecting 
rod cap. 

3 

Install the connecting rod end cap (1) on its original 
connecting rod and ensure the bearing lock tangs are 
aligned on the same side of the rod. 

Figure 6A1 – 407 

N O T E  

Reuse the old connecting rod bolts only for 
measuring the connecting rod bearing clearance. 

4 

Install the connecting rod cap bolts into the connecting rod cap and tighten to the correct torque specification using 
torque angle wrench, Tool No. EN-7115. 

Connecting rod cap attaching 
bolt torque specification: 
 

Stage 1 .........................30.0 Nm 

 

Stage 2 ........ Loosen completely 

 

Stage 3 .........................25.0 Nm 

 

Stage 4 .................. 110 degrees 

5 

Allow the assembly to sit for at least 2 minutes. 

6 

Remove the connecting rod cap bolts and discard. 

7 

Remove the connecting rod cap. 

Engine Mechanical – V6 

Page 6A1–222 

 

8 

Determine the connecting rod bearing clearance by 
comparing the width of the flattened plastic 
gauging (1) material at its widest point with the 
graduation on the gauging material container (2). 

9 

Compare the measurements with the specifications, 
refer to 5 

Specifications. 

10 

If the new bearings do not provide the correct 
crankshaft to connecting rod bearing clearance, 
inspect the following: 

11 

Measure the crankshaft connecting rod journals for 
the correct specified size and ensure the correct new 
bearings are being installed. If the crankshaft 
connecting rod journals are incorrectly sized, replace 
or regrind the crankshaft. Crankshaft machining is 
permitted and undersized bearings are available. 

12 

Measure the connecting rod bearing bore diameter to 
ensure correct size. The connecting rod is not 
machineable and the connecting rod must be 
replaced if out of specification. 

13 

Clean the plastic gauging material from the 
connecting rod bearing journals using a soft lint-free 
cloth. 

Figure 6A1 – 408 

Connecting Rod Final Assembly Procedure 

1 

Carefully guide the connecting rod away from the 
crankshaft connecting rod journal slightly to lubricate 
the crankshaft connecting rod bearing journal. 

2 

Apply a liberal amount of clean engine oil to the 
crankshaft connecting rod bearing journal. 

3 

Guide the connecting rod to the crankshaft 
connecting rod journal. 

4 

Install the connecting rod end cap (1) on its original 
connecting rod and ensure the bearing lock tangs are 
aligned on the same side of the rod. 

CAUTION

 

•  Do not lubricate the new connecting rod 

bolts. The new bolts have a pre-applied 
graphite lubricant. Applying lubricant to 
the connecting rod bolts will effect the 
clamp load when the connecting rod 
bolts are tightened to the specified 
torque. Incorrect clamp load can lead to 
component failure and extensive engine 
damage. 

•  Do not reuse the old connecting rod 

bolts. 

Figure 6A1 – 409 

5 

Install new connecting rod bolts into the connecting rod cap and tighten to the correct torque specification. 

„ Connecting rod cap attaching bolt 
torque specification: 
 

Stage 1 .........................30.0 Nm 

 

Stage 2 ........ Loosen completely 

 

Stage 3 .........................25.0 Nm 

 

Stage 4 .................. 110 degrees 

Engine Mechanical – V6 

Page 6A1–223 

 

 

N O T E  

During and after installation, ensure each piston 
is positioned correctly in the correct cylinder. The 
locating arrow on the top of each piston must be 
pointing toward the front of the engine. 

6 

Repeat these procedures for the remaining piston/connecting rod assemblies. 

7 

Reinstall the oil pan and oil pump pick up assembly, refer to 4.2  Oil Pan and Oil Pump Suction Pipe Assembly. 

8 

Reinstall the cylinder heads, refer to 3.22 

Cylinder Head Assembly. 

9 

Reinstall the engine assembly, refer to 4.1 

Engine . 

4.6 

Crankshaft and Main Bearings 

1 

Remove the engine assembly, refer to 4.1 

Engine . 

2 

Remove both cylinder head assemblies, refer to 3.22 

Cylinder Head Assembly. 

3 

Remove the oil pan assembly, refer to 4.2 

Oil Pan and Oil Pump Suction Pipe Assembly. 

4 

Remove the piston and connecting rod assemblies, refer to 4.5 

Pistons, Pins, Rings, Connecting Rods and Big-

end Bearings. 

5 

Remove the oil pump assembly, refer to 3.17 

Oil Pump Assembly. 

6 

Remove the crankshaft rear oil seal and plate assembly, refer to 4.4 

Crankshaft Rear Seal and Plate 

Assembly. 

7 

Remove the crankshaft position sensor, refer to 6C1-3 Engine Management – V6 – Service Operations. 

Crankshaft End Play Measurement 

1 

Place a dial indicator at the end of the crankshaft nose. 

2 

Gently force the crankshaft towards the front and rear of the cylinder block with a lever while monitoring the 
movement of the dial indicator. 

3 

The crankshaft endplay should not exceed specifications, refer to 5 

Specifications. 

4 

If the specifications are exceeded, inspect the thrust bearing thrust outer diameter and the crankshaft thrust wall for 
wear and/or excessive runout. Compare the values with the specifications, refer to 5 Specifications. 

5 

Replace the thrust bearing or crankshaft as required. 

Remove 

1 

Remove the crankshaft bearing cap side bolts (3). 

CAUTION

 

The crankshaft bearing cap outer bolts are 
yield tightened during assembly and must 
be replaced prior to reassembly. Crankshaft 
bearing cap outer bolts that are not replaced 
will not torque to the correct clamp load and 
can lead to serious engine damage. 

2 

Remove the crankshaft bearing cap outer bolts (1). 

3 

Remove the crankshaft bearing cap inner bolts (2). 

Figure 6A1 – 410 

Engine Mechanical – V6 

Page 6A1–224 

 

4 

Loosen the nuts (1) of the crankshaft main bearing 
cap remover, Tool No. J-41818 (2) to separate the 
chamfered collets. Install the collets into the inner bolt 
holes of the front main bearing cap (3). 

5 

Tighten the remover nuts to the correct torque 
specification. 

 

Crankshaft bearing cap remover nut.................11.0 Nm. 

 

6 

Install a slide hammer, Tool No. J-6125-1B (4) onto 
the crankshaft bearing cap remover and remove the 
crankshaft bearing cap. 

7 

Repeat steps 9 to 14 for the remaining crankshaft 
bearing caps. 

Figure 6A1 – 411 

8 

Remove the crankshaft (1) from the engine block (2), 
lifting evenly to avoid jamming against the main thrust 
bearing. 

9 

Place the crankshaft in a secure place. 

Figure 6A1 – 412 

10 

If required, remove the crankshaft sprocket drive 
pin (1) from the crankshaft (2),  

Figure 6A1 – 413