Isuzu KB P190. Manual - part 739

Engine Mechanical – V6 

Page 6A1–179 

 

Page 6A1–179 

27 

Release the right-hand timing chain tensioner (1) by 
pulling out Tool No. EN 46112 (2) and unlocking the 
tensioner plunger. 

 

 

Figure 6A1 – 284 

28 

Verify all primary and secondary timing chain timing 
mark alignments (1 to 18). 

29 

Remove Tool No. EN 46105–1 and EN 46105-2 from 
the left and right-hand cylinder head camshafts. 

30 

Reinstall the spark plugs. Refer to 

Section 6C1-3 

Engine Management – V6 – Service Operations

. 

31 

Reinstall the engine front cover assembly, refer to 

3.15  Front Cover Assembly

. 

 

Figure 6A1 – 285

 

Engine Mechanical – V6 

Page 6A1–180 

 

Page 6A1–180 

3.17  Oil Pump Assembly 

Remove 

N O T E  

Do not remove the left-hand bank idler sprocket. 

1 

Remove the primary timing chain and crankshaft sprocket, refer to 

3.16  Timing Chains, Tensioners, Shoes and 

Guides

. 

2 

Remove the three bolts (1) attaching the oil pump (2).

3 

Remove the oil pump assembly. 

 

Figure 6A1 – 286 

Engine Mechanical – V6 

Page 6A1–181 

 

Page 6A1–181 

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 – 287 

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 – 288 

Engine Mechanical – V6 

Page 6A1–182 

 

Page 6A1–182 

3 

Remove the inner gerotor ring (1). 

4 

Remove the outer gerotor ring (2). 

 

 

Figure 6A1 – 289 

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 – 290 

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.