2007 ISUZU KB P190 lock

Engine Mechanical – V6 Page 6A1–92

Reinstall
Reinstallation of the front cover is the reverse of the removal procedure, noting the following:
1 Install the guide pins, Tool No. EN-46109 (1) into the engine block, two places.
Figure 6A1 – 93
2 Install a new engine front cover to cylinder block seal (1).
Figure 6A1 – 94
3 Apply a 3 mm bead of RTV sealant (1) to the front cover.
Figure 6A1 – 95

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–93

4 Place the front cover onto the special tools and slide
into position.
5 Remove the special tools from the cylinder block.
Figure 6A1 – 96
6 Hand start the front cover bolts (1).
Figure 6A1 – 97
7 Tighten the engine front cover bolts to the correct torque specification, in the sequence shown.


Engine front cover assembly attaching
bolt torque specification ..........................20.0 – 26.0 Nm


8 Fill the cooling system, refer to 6B1 Engine Cooling – V6.
9 Change the engine oil, refer to 3.1 Engine Oil.



Figure 6A1 – 98

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–96

Remove
Right-hand Secondary Timing Chain
CAUTION
After removing the upper intake manifold, and
spark plugs, plug any openings to prevent dirt
and other contaminants from entering.
1 Remove the engine front cover assembly, refer to 3.15 Front Cover Assembly.
2 Remove the spark plugs to aid crankshaft/engine rotation, refer to 6C1-3 Engine Management – V6 – Service Operations.
3 Install Tool No. EN46111 (1) onto the crankshaft (2).
Figure 6A1 – 101
4 Using Tool No. EN46111 (1), rotate the crankshaft in a clockwise direction until the crankshaft sprocket
timing mark (2) is aligned with the indexing mark (3)
on the oil pump housing.
Figure 6A1 – 102

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ISUZU KB P190 2007

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).


NOTE
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

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–106

Inspect
Timing Chains
1 Inspect the primary and/or secondary timing chains
for the following:
• binding or worn rollers (1),
• loose links (2), and
• loose pins (3).
2 Replace a damaged timing chain as required.

Figure 6A1 – 128
Camshaft Intermediate Driveshaft Sprockets

Figure 6A1 – 129
1 Inspect the camshaft intermediate driveshaft sprockets for the following: • Damage to the primary and secondary timing chain sprocket (1), refer to Figure 6A1 – 129.
• Damage to the hub bearing (2). Ensure the hub bearing spins freely. If the hub bearing wobbles, is noisy or
feels rough when rotated replace the camshaft intermediate sprocket, and
• Damage to the bolt flange seating / sealing surface (3).
• Damage to the bearing hub-to-engine block sealing surface.
Inlet and Exhaust Camshaft Sprocket
Inspect the camshaft sprocket assemblies, refer to 3.18 Camshaft Sprocket.

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–108

Primary Timing Chain Tensioner

Figure 6A1 – 133
1 Inspect the primary timing chain tensioner for worn shoe surface (1), refer to Figure 6A1 – 133.
2 Inspect the tensioner for a locked or binding tensioner shaft (2). Reset the plunger (3) and ensure the tensioner shaft moves freely in and out of the body of the tensioner.
NOTE
To reset the tensioner, use a suitably sized flat
blade screwdriver or Tool No. J 45027 (4) to wind
the plunger in a clockwise direction, into the
tensioner shaft.
3 Replace a damaged tensioner as required.
Left-hand Secondary Timing Chain Guide
1 Inspect the left-hand secondary timing chain guide for the following:
• worn guide surface (1),
• cracked or broken guide surface (2), and
• cracked or damaged guide base (3).
2 Replace a damaged guide as required.

Figure 6A1 – 134

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–110

2 Inspect the tensioner for locked or binding tensioner shaft (2). Reset the plunger (3) and ensure the tensioner shaft
moves freely in and out of the body of the tensioner.
NOTE
To reset the tensioner, use a suitably sized flat
blade screwdriver or Tool No. J 45027 (4) to wind
the plunger in a clockwise direction, into the
tensioner shaft.
3 Replace a damaged tensioner as required.
Right-hand Secondary Timing Chain Guide
1 Inspect the right-hand secondary timing chain guide for the following:
• worn guide surface (1),
• cracked or broken guide surface (2), and
• cracked or damaged guide base (3).
2 Replace a damaged guide as required.

Figure 6A1 – 138
Right-hand Secondary Timing Chain Shoe
1 Inspect the front of the right-hand secondary timing chain shoe for the following:
• worn shoe surface (1),
• cracked or broken shoe surface (2), and
• cracked or damaged shoe (3).

Figure 6A1 – 139

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–111

2 Inspect the back of the shoe for a damaged, worn or
missing timing chain tensioner contact pad (1).
Replace a damaged shoe as required.
Figure 6A1 – 140
Right-hand Secondary Timing Chain Tensioner

Figure 6A1 – 141
1 Inspect the right-hand secondary timing chain tensioner for damaged plunger-to-shoe contact surface (1), refer to Figure 6A1 – 141.
NOTE
To reset the tensioner, use a suitably sized flat
blade screwdriver or Tool No. J 45027 (4) to wind
the plunger in a clockwise direction, into the
tensioner shaft.
2 Inspect the tensioner for a locked or binding tensioner shaft (2). Reset the plunger (3) and ensure the tensioner shaft moves freely in and out of the body of the tensioner.
3 Replace a damaged tensioner as required.
Reinstall
Left-hand Secondary Timing Chain Components


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ISUZU KB P190 2007