Isuzu KB P190. Manual - part 644

Engine Mechanical – V6 

Page 6A1–97 

 

5 

After aligning the crankshaft sprocket timing mark, 
check that the camshaft flats (1) at the rear of the 
right-hand cylinder head are parallel with the 
camshaft cover rail (2). 

6 

If the camshaft flats are not as shown, rotate the 
crankshaft 360 

°. 

Figure 6A1 – 103 

7 

Install Tool No. EN 46105-1 (1) onto the rear of the 
right-hand cylinder head camshafts (2). 

Figure 6A1 – 104 

8 

Install Tool No. EN 46105-2 (1) onto the rear of the 
left-hand cylinder head camshafts (2), and tool No 

Figure 6A1 – 105 

Engine Mechanical – V6 

Page 6A1–98 

 

9 

Remove the right-hand secondary timing chain 
tensioner bolts (1) and remove the tensioner (2). 

 

 

N O T E  

Take care when removing the tensioner bolts. 
The tensioner plunger is subjected to spring 
tension and may spring apart during tensioner 
removal. 

Figure 6A1 – 106 

10 

Remove the tensioner gasket (1) from the tensioner 
(2) and discard the gasket. 

11 

Inspect the tensioner mounting surface on the right-
hand cylinder head for burrs or any defects that would 
affect the sealing of a new tensioner gasket. 

Figure 6A1 – 107 

12 

Remove the right-hand secondary timing chain shoe 
bolt (1). 

Figure 6A1 – 108 

Engine Mechanical – V6 

Page 6A1–99 

 

13 

Remove the right-hand secondary timing chain shoe 
(1). 

Figure 6A1 – 109 

14 

Remove the two right-hand secondary timing chain 
guide bolts (1) and remove the guide (2). 

Figure 6A1 – 110 

15 

Remove the right-hand secondary timing chain (1) 
from the camshaft position actuators (2) and the 
camshaft intermediate driveshaft sprocket (3). 

Figure 6A1 – 111 

Engine Mechanical – V6 

Page 6A1–100 

 

Primary Timing Chain 

1 

Remove the right-hand secondary timing chain, refer to Right-hand Secondary Timing Chain in this Section. 

2 

Remove the two primary timing chain tensioner 
bolts (1), and remove the tensioner (2). 

 

 

N O T E  

Take care when removing the tensioner bolts. 
The tensioner plunger is subjected to spring 
tension and may spring apart during tensioner 
removal. 

 

Figure 6A1 – 112 

3 

Remove the gasket (1) from the tensioner (2) and 
discard the gasket. 

4 

Inspect the primary timing chain tensioner mounting 
surface on the engine block for burrs or any defects 
that would affect the sealing of a new tensioner 
gasket. 

 

Figure 6A1 – 113 

5 

Remove the two primary timing chain upper guide 
bolts (1) and remove the guide (2). 

 

Figure 6A1 – 114