Isuzu KB P190. Manual - part 731

Engine Mechanical – V6 

Page 6A1–147 

 

Page 6A1–147 

CAUTION

 

If Tool No. EN 46112 (1) is not removed from  
the tensioner body (2), the tensioner 
shaft (3) will remain in the locked position 
and no tension will be placed on the timing 
chain, this will cause damage to the engine. 

25 

Compress the tensioner shaft into the body and lock 
the left-hand secondary timing chain tensioner by 
inserting Tool No. EN 46112 into the access hole in 
the side of the tensioner body. 

26 

Slowly release pressure on the left-hand secondary 
timing chain tensioner. The tensioner should remain 
compressed. 

 

Figure 6A1 – 192 

27 

Install a new left-hand secondary timing chain 
tensioner gasket (1) to the tensioner (2). 

28 

Install the left-hand secondary timing chain tensioner 
bolts through tensioner and gasket. 

29 

Ensure the left-hand secondary timing chain tensioner 
mounting surface on the left-hand cylinder head does 
not have any burrs or defects that would affect the 
sealing of the new gasket. 

 

Figure 6A1 – 193 

30 

Place the left-hand secondary timing chain tensioner 
(2) into position and loosely install the bolts (1) to the 
cylinder head. 

 

Figure 6A1 – 194 

Engine Mechanical – V6 

Page 6A1–148 

 

Page 6A1–148 

31 

Verify the proper placement of the left-hand 
secondary timing chain tensioner gasket tab (1). 

32 

Tighten the left-hand secondary timing chain 
tensioner bolts (2) to the correct torque specification. 

 

 

 

 

Secondary timing chain tensioner 
attaching bolt torque specification...........20.0 – 26.0 Nm 

 

 

Figure 6A1 – 195 

33 

Release the left-hand secondary timing chain 
tensioner (1) by pulling out Tools No. EN 46112 (2) 
and unlocking the tensioner shaft. 

 

Figure 6A1 – 196 

34 

Verify the left-hand secondary timing chain timing 
mark alignments (1 to 6). 

 

 

Figure 6A1 – 197 

 

Engine Mechanical – V6 

Page 6A1–149 

 

Page 6A1–149 

Primary Timing Chain Components – Excluding MY06 Update 

1 

If previously removed, install the left-hand secondary 
timing chain components, refer to Left-hand 
Secondary Timing Chain Components in this Section.

CAUTION

 

The right-hand camshaft intermediate 
sprocket (2) is marked with the letters RB 
and ‘FRONT’, and the left-hand sprocket (1) 
is marked with the letters LB and 'FRONT' 
Ensure the correct sprocket is used and the 
FRONT text is facing forwards when 
installed. 

2 

Ensure the right-hand camshaft intermediate 
sprocket (2) is selected and orientated correctly. 

 

 

Figure 6A1 – 198

 

3 

Install the right-hand camshaft intermediate sprocket 
(2). 

4 

Install the sprocket bolt (1) and tighten to the correct 
torque specification. 

 

 

Camshaft intermediate sprocket 
attaching bolt torque specification...........58.0 – 72.0 Nm 

 

 

Figure 6A1 – 199 

5 

Ensure that the crankshaft sprocket timing mark (1) is 
aligned with the indexing mark (2) on the oil pump 
housing. 

 

 

Figure 6A1 – 200 

Engine Mechanical – V6 

Page 6A1–150 

 

Page 6A1–150 

6 

Install the primary timing chain (1). 

 

 

Figure 6A1 – 201 

7 

Wrap the primary timing chain around the large 
sprockets of each camshaft intermediate sprocket 
and the crankshaft sprocket aligning the bright plated 
chain links as follows: 

 

 

Figure 6A1 – 202 

8 

The left-hand camshaft intermediate sprocket timing 
mark (1) will align with a bright plated primary timing 
chain link (2). 

 

 

Figure 6A1 – 203