Isuzu KB P190. Manual - part 660

Engine Mechanical – V6 

Page 6A1–161 

 

Reinstall 

1 

Fill the stationary hydraulic lash adjuster (SHLA) with 
clean engine oil. Take precautions to prevent 
scratching the pivot sphere area of the SHLA. 

2 

Lubricate the SHLA bores in the cylinder head with 
clean engine oil. 

3 

Install the SHLA in the cylinder head (2). 

4 

Apply a liberal amount of commercially available 
camshaft/lifter prelube to the SHLA pivot spheres. 

5 

Install the rocker arms, refer to 3.20 

Rocker Arm. 

 

 

CAUTION

 

Ensure each lash adjuster (1) is filled with 
clean engine oil and the adjuster does not 
tip over, plunger down, before the 
installation. The loss of oil in the adjuster 
lower pressure chamber, or the dry 
stroking/cycling of the adjuster plunger, will 
allow air to enter the high pressure chamber 
of the valve lifter. Air in the high pressure 
chamber of the adjuster may not be purged 
causing cavitation and extensive engine 
component damage. 

Figure 6A1 – 274 

 

3.22  Cylinder Head Assembly 

Remove  

Right-hand Side (Bank 1) Cylinder Head 

1 

Remove the heater hoses and heater pipe assembly, refer to 6B1 Engine Cooling – V6. 

2 

Remove the intake manifold assembly, refer to 3.10 

Intake Manifold Assembly – Complete. 

3 

Remove the exhaust manifold, refer to 3.11 

Exhaust Manifold Assembly. 

4 

Remove engine harness ground terminal attaching bolts from the cylinder head, refer to 8A Electrical Body and 
Chassis. 

5 

Remove the right-hand side secondary timing chain, refer to 3.16  Timing Chains, Tensioners, Shoes and Guides. 

6 

Remove the camshaft sprockets, refer to 3.18  Camshaft Sprocket. 

7 

Remove the cylinder head attaching bolt (1), eight 
places. 

8 

Remove the cylinder head. 

 

N O T E  

There is no bolt fitted to the hole in the rear of 
the right-hand-hand cylinder head. 

Figure 6A1 – 275 

Engine Mechanical – V6 

Page 6A1–162 

 

9 

Remove and discard the cylinder head gasket (1). 

 

Figure 6A1 – 276 

Left-hand Side (Bank 2) Cylinder Head 

1 

Remove the intake manifold assembly, refer to 3.10 

Intake Manifold Assembly – Complete. 

2 

Remove the exhaust manifold, refer to 3.11 

Exhaust Manifold Assembly. 

3 

Remove the power steering reservoir and pump mounting brackets, refer to 3.8 

Power Steering Pump Bracket. 

N O T E  

Do not disconnect the power steering pipes 
and/or hoses. 

4 

Remove the oil filter adapter upper bolt. 

N O T E  

Do not remove the oil filter adapter. 

5 

Remove the engine coolant temperature (ECT) sensor, refer to 6C1-3 Engine Management – V6 – Service 
Operations. 

6 

Remove engine harness ground terminal attaching bolt from cylinder head, refer to 8A Electrical Body & Chassis. 

7 

Remove the left-hand bank secondary timing chain, refer to 3.16  Timing Chains, Tensioners, Shoes and Guides. 

8 

Remove the camshaft position actuators, refer to 3.18 

Camshaft Sprocket. 

9 

Remove the front M8 (1) cylinder head attaching bolt, 
two places. 

10 

Remove the cylinder head attaching bolt (2), eight 
places. 

11 

Remove the cylinder head (3). 

 

Figure 6A1 – 277 

Engine Mechanical – V6 

Page 6A1–163 

 

12 

Remove and discard the cylinder head gasket (1). 

 

Figure 6A1 – 278 

Disassemble 

1 

Using an appropriately sized deep socket (1) and a 
plastic hammer (2), lightly tap on the valve spring 
retainer to loosen the valve collets. 

 

 

CAUTION

 

Ensure valve heads will not contact anything 
during this step in order to avoid bending or 
damage. 

Figure 6A1 – 279 

Engine Mechanical – V6 

Page 6A1–164 

 

CAUTION

 

Do not compress the valve springs less than 
24.0 mm. Contact between the valve spring 
retainer and the valve stem oil seal can 
cause potential valve stem oil seal damage. 

 

Compressed valve springs (1) have high 
tension against the valve spring 
compressor (2). Valve springs that are not 
correctly compressed by, or are released 
from the valve spring compressor can be 
ejected from the valve spring compressor 
with intense force. Use care when 
compressing or releasing the valve spring 
with the valve spring compressor and when 
removing or installing the valve stem keys. 
Failing to use care may cause personal 
injury. 

2 

Compress the valve spring (1) using valve spring 
compressor Tool No. J-8062 (2) and adaptor Tool No. 
EN-46119. 

 

Figure 6A1 – 280 

3 

Remove the valve collets using Tool EN-46117 (1). 

4 

Remove the valve spring compressor (2) and the 
adapter (3). 

 

Figure 6A1 – 281