Isuzu KB P190. Manual - part 746

Engine Mechanical – V6 

Page 6A1–207 

 

Page 6A1–207 

7 

Measure the camshaft lobes for wear using a dial 
indicator (1). 

 

 

Figure 6A1 – 342 

8 

Place the dial indicator tip on the base circle (1) of the 
camshaft lobe. 

9 

Set the dial indicator at zero. 

10 

Rotate the camshaft until the indicator tip is at the 
highest point (2) on the lobe. This reading is the lift of 
the camshaft lobe. 

 

 

Figure 6A1 – 343 

Reinstall 

Right-hand Side 

1 

Select the correct camshaft for the particular 
installation location. ID markings are on the rear end 
of each camshaft. The ID markings are defined as 
follows: 
• 

The first five digits refer to the date and time of 
production. 
• 

Example = 3L18H. 

• 

Digits six through nine refer to engine 
production code. 
• 

LY7 = Alloytec 190 engine. 

• 

The last two digits refer to position: 
• 

LI = left-hand intake. 

• 

LE = left-hand exhaust. 

• 

RI = right-hand intake. 

• 

RE = right-hand exhaust. 

 

 

Figure 6A1 – 344 

Engine Mechanical – V6 

Page 6A1–208 

 

Page 6A1–208 

2 

Apply a liberal amount of engine oil to the 
camshaft (1) journals and the right-hand cylinder 
head camshaft carriers (2). 

 

 

Figure 6A1 – 345 

3 

Position the camshafts (1) on the cylinder head and 
assemble the camshaft sprockets to the camshafts. 

 

 

 

N O T E  

Install the camshaft sprocket bolts but do not 
tighten at this stage. 

 

 

Figure 6A1 – 346 

4 

Ensure the camshaft lobes are in the neutral position 
with the flats on the back of the camshafts up and 
parallel (1) with the right-hand cylinder head camshaft 
cover rail. 

5 

Ensure the marks on the right-hand exhaust camshaft 
position actuator and timing chain, made prior to the 
disassemble operation are aligned. 

6 

Ensure the marks on the right-hand intake camshaft 
position actuator and timing chain, made prior to the 
disassemble operation are aligned. 

 

 

Figure 6A1 – 347 

Engine Mechanical – V6 

Page 6A1–209 

 

Page 6A1–209 

7 

Observe the markings on the right-hand cylinder head 
camshaft bearing caps. Each bearing cap is 
marked (1) to identify its location. The markings have 
the following meanings: 
• 

The raised feature must always be oriented 
toward the centre of the cylinder head. 

• 

The I indicates the intake camshaft. 

• 

The E indicates the exhaust camshaft. 

• 

The number 1, 3, 5 indicates the cylinder 
position from the front of the engine. 

8 

Apply a liberal amount of engine oil to the camshaft 
bearing caps. 

 

 

Figure 6A1 – 348 

9 

Install the camshaft bearing thrust cap (1) in the first 
journal of the right-hand cylinder head. 

10 

Install the remaining bearing caps (2) with their 
orientation mark toward the centre of the cylinder 
head. 

11 

Hand start all the camshaft bearing cap bolts (3). 

 

 

Figure 6A1 – 349 

12 

Tighten the camshaft bearing cap bolts to the correct 
torque specification and in the sequence shown. 

 

Camshaft bearing cap attaching 
bolt torque specification: 

Stage 1: ....................................................8.0 – 12.0 Nm 

13 

Loosen the centre intake camshaft bearing cap bolts 
1 and 2, and the centre exhaust camshaft bearing cap 
bolts 3 and 4. 

14 

Retighten the centre camshaft bearing cap bolts 1, 2, 
3 and 4 to the correct torque specification. 

 

Camshaft bearing cap attaching 
bolt torque specification: 

Stage 2: ....................................................8.0 – 12.0 Nm 

15 

Install the right-hand cylinder head camshaft 
sprocket, refer to 

3.18  Camshaft Sprocket

. 

 

Figure 6A1 – 350 

Engine Mechanical – V6 

Page 6A1–210 

 

Page 6A1–210 

Left-hand Side 

1 

Select the correct camshaft for the particular 
installation location. ID markings can be found on the 
rear end of each camshaft. The ID markings are 
defined as follows: 
• 

The first five digits refer to the date and time of 
production. 
• 

Example = 3L18H. 

• 

Digits six through nine refer to engine 
production code. 
• 

LY7 = Alloytec 190 engine. 

• 

The last two digits refer to position: 
• 

LI = left-hand intake. 

• 

LE = left-hand exhaust. 

• 

RI = right-hand intake. 

• 

RE = right-hand exhaust. 

 

 

Figure 6A1 – 351 

2 

Apply a liberal amount of engine oil to the camshaft 
journals and the left-hand cylinder head camshaft 
carriers. 

 

 

Figure 6A1 – 352 

3 

Position the camshafts (1) on the cylinder head and 
assemble the camshaft sprockets to the camshafts. 

 

 

 

N O T E  

Install the camshaft sprocket bolts but do not 
tighten at this stage. 

 

 

Figure 6A1 – 353