Isuzu KB P190. Manual - part 772

Engine Mechanical – V6 

Page 6A1–311 

 

Page 6A1–311 

3 

Position the alignment pin (1) through the bushing 
and into the crankshaft main cap bolt hole. 

4 

With the alignment pin in the desired crankshaft main 
cap bolt hole, tighten the fixture retaining bolts (2). 

5 

Remove the alignment pin. 

 

Figure 6A1 – 574 

6 

Drill the crankshaft main bolt hole until the mark (1) 
on the drill aligns with the top of the drill bushing (2). 

 

N O T E  

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

 

Figure 6A1 – 575 

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 – 576 

Engine Mechanical – V6 

Page 6A1–312 

 

Page 6A1–312 

N O T E  

•  During the tapping process, repeatedly 

remove the tap and clean the 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. 

CAUTION

 

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

8 

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

 

Figure 6A1 – 577 

9 

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

 

Figure 6A1 – 578 

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. 

10 

Using compressed air, clean out any swarf. 

 

Figure 6A1 – 579 

Engine Mechanical – V6 

Page 6A1–313 

 

Page 6A1–313 

11 

Spray a commercially available thread cleaner into 
the tapped hole. 

 

Figure 6A1 – 580 

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. 

12 

Using compressed air, clean out any swarf. 

 

 

Figure 6A1 – 581 

N O T E  

•  Do not remove the fixture plate, ensure the 

fixture plate is installed during the 
installation process of the insert. 

•  Do not allow oil or other foreign material to 

contact the outside diameter (OD) of the 
insert. 

13 

Lubricate the threads of the driver installation tool (2) 
with the driver oil (1). 

 

Figure 6A1 – 582 

Engine Mechanical – V6 

Page 6A1–314 

 

Page 6A1–314 

14 

Install the insert (2) onto the driver installation tool (1).

 

Figure 6A1 – 583 

15 

Apply thread lock sealant (1) such as Loctite 277® or 
equivalent to the insert OD threads (2). 

 

Figure 6A1 – 584 

16 

Install the insert and installation driver (1) to the 
tapped hole by hand only. 

17 

Start the insert into the threaded hole. 

CAUTION

 

If the insert will not thread down until the 
flange contacts the counter-bored surface, 
remove the insert immediately with a screw 
extracting tool and inspect the tapped hole 
for any remaining swarf and/or incorrect 
tapping. 

18 

Install the insert until the flange of the insert contacts 
the counter-bored surface. 

N O T E  

The driver installation tool will tighten up before 
cutting completely through the insert. This is 
acceptable. The threads at the bottom of the 
insert are being formed and the insert is 
mechanically locking the insert into the base 
material threads. 

19 

Continue to rotate the driver installation tool through 
the insert. 

 

Figure 6A1 – 585