Isuzu KB P190. Manual - part 773

Engine Mechanical – V6 

Page 6A1–315 

 

Page 6A1–315 

20 

Rotate the driver installation tool until the mark (1) on 
the driver installation tool aligns with the top of the 
drill bushing (2). 

21 

Inspect the insert for correct installation into the 
tapped hole. 

 

Figure 6A1 – 586 

22 

Remove the fixture plate bolts (1), bushing (2) and 
fixture plate (3). 

 

Figure 6A1 – 587 

Cylinder Head Bolt Hole Thread Repair 

The cylinder head bolt hole thread repair tools are in Tool 
No. J 42385-2000 and J 42385-700 which consist of the 
following: 
• 

Drill (1) J 42385-723 

• 

Tap (2) J 42385-724 

• 

Installation driver (3) J 42385-725 

• 

Alignment pin (4) J 42385-303 

• 

Bushing (5) J 42385-302 

• 

Bolts (6) J 42385-733 

• 

Fixture plate (7) J 42385-401 

 

Figure 6A1 – 588 

Engine Mechanical – V6 

Page 6A1–316 

 

Page 6A1–316 

N O T E  

•  Ensure the fixture plate is installed during the 

machining and installation processes of the 
insert. 

•  The use of a cutting type fluid such as 

WD 40® or equivalent is recommended when 
performing the drilling, counter boring and 
tapping procedures. 

•  When installed to the correct depth, the flange 

of the insert will be seated against the counter 
bore of the drilled/tapped hole. 

1 

Position the fixture plate (3) with the bushing (1) 
installed over the cylinder head bolt hole to be 
repaired (4). 

2 

Loosely install the fixture plate bolts (2) into the 
remaining cylinder head bolt holes. 

 

Figure 6A1 – 589 

3 

Position the alignment pin (1) through the bushing 
and into the cylinder head bolt hole. 

4 

With the alignment pin in the desired cylinder head 
bolt hole, tighten the fixture retaining bolts (2). 

5 

Remove the alignment pin. 

 

Figure 6A1 – 590 

Engine Mechanical – V6 

Page 6A1–317 

 

Page 6A1–317 

N O T E  

During the drilling process, repeatedly remove 
the drill and clean swarf from the hole and the 
flutes of the drill. 

6 

Drill the hole until the stop collar contacts the top of 
the drill bushing. 

 

Figure 6A1 – 591 

N O T E  

All swarf must be removed from the drilled hole 
prior to tapping. 

 

Safety glasses must be worn when using 
compressed air. 

7 

Using compressed air, clean out any swarf. 

 

Figure 6A1 – 592 

CAUTION

 

Do not remove the fixture plate during the 
machining and installation processes of the 
insert. 

N O T E  

•  During the tapping process, repeatedly 

remove the tap and clean swarf from the 
hole and the flutes of the tap. 

•  Ensure the tap has created full threads at 

least to the depth equal to the insert length. 

8 

Using a suitable tapping wrench, tap the threads of 
the drilled hole by hand only. 

 

Figure 6A1 – 593 

Engine Mechanical – V6 

Page 6A1–318 

 

Page 6A1–318 

9 

In order to tap the new threads for the insert to the 
correct depth, rotate the tap into the cylinder head 
bolt hole until the mark (1) on the tap aligns with the 
top of the drill bushing (2). 

 

Figure 6A1 – 594 

N O T E  

Remove the fixture plate prior to installing the 
insert with the installer tool. 

10 

Remove the bushing (1) and fixture plate bolts (2) 
from the cylinder block (4) and remove the fixture 
plate (3). 

 

Figure 6A1 – 595 

N O T E  

All swarf must be removed from the tapped hole 
prior to insert installation. 

 

Safety glasses must be worn when using 
compressed air. 

11 

Using compressed air, clean out any swarf. 

 

Figure 6A1 – 596