Isuzu KB P190. Manual — part 654

Engine Mechanical – V6

Page 6A1–137

Disassemble

CAUTION

There are no serviceable components within
the oil pump. Disassemble the pump only to
diagnose an oil related concern. A
disassembled oil pump must not be reused: it
must be replaced.

1

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

CAUTION

The primary timing chain lower guide is not
serviced separately and is part of the oil
pump assembly. If it is removed from the
pump assembly, the guide and the pump
must be replaced.

Figure 6A1 – 213

2

Remove the seven bolts (2) attaching the oil pump
cover to the oil pump housing (1) and remove the
cover from the housing.

Figure 6A1 – 214

Engine Mechanical – V6

Page 6A1–138

3

Remove the inner gerotor ring (1).

4

Remove the outer gerotor ring (2).

Figure 6A1 – 215

5

Remove the clip (1), retaining the oil relief valve cap
(2).

6

Remove the cap, spring (3) and plunger (4) from the
oil pump housing.

Figure 6A1 – 216

Clean

1

Clean the oil pump components with non-corrosive solvent.

Safety glasses must be worn when using
compressed air.

2

Dry the oil pump components with compressed air.

Engine Mechanical – V6

Page 6A1–139

Inspect

1

Inspect the oil pump housing for damage.

Figure 6A1 – 217

2

Inspect the oil pump cover for damage.

Figure 6A1 – 218

3

Inspect the inner drive gear for damage. If inner
surface damage is found, ensure the crankshaft is
also inspected.

Figure 6A1 – 219

Engine Mechanical – V6

Page 6A1–140

4

Inspect the outer driven gear for damage.

Figure 6A1 – 220

5

Inspect the oil pump relief valve components for
debris or damage.

Figure 6A1 – 221

6

Inspect the primary camshaft chain lower guide for
damage. If replacement of the primary camshaft chain
lower guide is required, replace the entire oil pump
assembly as the primary camshaft chain lower guide
is not serviceable separately.

7

If debris or damage is present within the oil pump,
further inspection of all of the engine components is
required.

Figure 6A1 – 222