2007 ISUZU KB P190 ECO mode

Engine Mechanical – V6 Page 6A1–124
Page 6A1–124
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 – 130
Camshaft Intermediate Sprockets

Figure 6A1 – 131

1 Inspect the camshaft intermediate sprockets for the following:
• Damage to the primary and secondary timing chai n sprocket (1), refer to Figure 6A1 – 129.
• Damage to the hub bearing (2). Ensure the hub bearing sp ins freely. If the hub bearing wobbles, is noisy or
feels rough when rotated replace t he camshaft intermediate sprocket, and
• Damage to the bolt flange seating / sealing surface (3).
• Damage to the bearing hub-to-engi ne 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 6A1–126
Page 6A1–126
Primary Timing Chain Tensioner

Figure 6A1 – 135
1 Inspect the primary timing chain tensioner for wo rn 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 tens ioner 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 – 136

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–127
Page 6A1–127
Left-hand Secondary Timing Chain Shoe
1 Inspect the front of the left-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 – 137
2 Inspect the back of the shoe for a damaged, worn or missing timing chain tensioner contact pad (1).
3 Replace a damaged shoe as required.


Figure 6A1 – 138
Left-hand Secondary Timing Chain Tensioner

Figure 6A1 – 139
1 Inspect the left-hand secondary timing chain tensioner fo r damaged plunger-to-shoe contact surface (1), refer to
Figure 6A1 – 137.

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–128
Page 6A1–128
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 tens ioner 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 – 140
Right-hand Secondary Timing Chain Shoe
1 Inspect the front of t he 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 – 141

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–129
Page 6A1–129
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 – 142
Right-hand Secondary Timing Chain Tensioner

Figure 6A1 – 143
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 tens ioner as required.

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–130
Page 6A1–130
Reinstall
Left-hand Secondary Timing Chain Components – Excluding MY06 Update
1 Install the crankshaft sprocket (1) onto the
crankshaft (2) by aligning the keyway to the key on
the crankshaft.
2 Slide the crankshaft sprocket on the crankshaft until the crankshaft sprocket contacts the step in the
crankshaft.


Figure 6A1 – 144
NOTE
Ensure that the crankshaft sprocket is installed
with the timing mark (1) visible.

Figure 6A1 – 145
CAUTION
In order to install Tool No. EN 46105 onto the
camshafts, rotate the camshafts in an anti-
clockwise direction. There should be no
need to rotate the camshaft more than 45
degrees.

Figure 6A1 – 146

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–131
Page 6A1–131
3 Install Tool No. EN 46105-1 (1) onto the rear of the
left-hand cylinder head camshafts (2), and Tool No.
EN 46105-2 onto the rear of the right-hand cylinder
head camshafts.
4 Ensure that Tool No. EN 46105 is fully seated onto the camshafts.


CAUTION
All camshafts must be locked in place before
installation of any timing chains.

Figure 6A1 – 147
5 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 – 148
6 Install the left-hand secondary timing chain (1) aligning the chain in the following manner:


Figure 6A1 – 149

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–132
Page 6A1–132
7 Wrap the secondary timing chain around both left-
hand camshaft drive sprockets.
8 Ensure there are two bright links located on top of each of the camshaft sprockets.


Figure 6A1 – 150
CAUTION
When aligning the left-hand secondary timing
chain to the camshaft sprockets, ensure the
circular timing marks on the sprocket are
used, NOT the triangular mark.
9 Align the bright plated timing chain link (1) with the left-hand exhaust camshaft position sprocket
alignment circle mark (2).


Figure 6A1 – 151

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ISUZU KB P190 2007