Isuzu N-Series. Manual - part 486

Engine Mechanical (4HK1-TC)   6A-49

Tighten:
Bolts (1) to 96 N

⋅m (9.8 kg⋅m/71 lb⋅ft)

Bolts (2) to 77 N

⋅m (7.9 kg⋅m/57 lb⋅ft)

Bolts (3) to 38 N

⋅m (3.9 kg⋅m/28 lb⋅ft)

• Tighten up the Mark 3 from the cylinder block

side.

5. Install the power steering pump idle gear.

• Apply engine oil over the part where the gear of

the idle gear shaft is to be put together.

• Put the idle gear and the shaft together and

install it on the location given on the figure and
tighten up with the prescribed torque.

Tighten:
Bolts to 133 N

⋅m (13.6 kg⋅m/98 lb⋅ft)

N6A6070E

N6A6071E

6A-50   Engine Mechanical (4HK1-TC)

6. Install the power steering pump idle gear cover.

• Install the O-ring on the cover and install it on

the flywheel housing and tighten up the
tightening bolts with the prescribed torque.

Tighten:
Bolts to 19 N

⋅m (1.9 kg⋅m/14 lb⋅ft)

7. Install the power steering pump.

• Install the power steering pump and tighten up

with the prescribed torque.

Tighten:
Fixing bolts to 
Flywheel housing side (1): 43 N

⋅m (4.4 kg⋅m/32 lb⋅ft)

Cylinder block side (2): 44 N

⋅m (4.5 kg⋅m/32 lb⋅ft)

Without HBB

With HBB

Legend

1. Flywheel Housing Fixing Bolt
2. Cylinder Block Fixing Bolt

 

8. Install the oil pan

• Apply the liquid gasket (ThreeBond1207C or

equivalent) on a joint between the cylinder
block, the front cover and the flywheel housing
with a beat diameter of 3 mm (0.1 in).

N6A6072E

N6A6073E

N6A0775E

N6A6074E

Engine Mechanical (4HK1-TC)   6A-51

• Install the oil pan within 7 minutes after applying

the liquid gasket.

• With the flywheel housing, the front cover and

the stud of the crankcase as a guide, put
together the gasket and put the oil pan on it.
Then, put the rubber assembly on the oil pan
and fix it by fastening bolts and nuts.

Legend

1. Rubber Assembly
2. Oil Pan
3. Gasket

 

• After fastening the oil pan at the respective

points of (1), (2), (3), and (4), fasten other parts.

Tighten:
Bolts and nuts to 11 N

⋅m (1.1 kg⋅m/95 lb⋅in)

9. Install the rear slinger and the oil seal.

Refer to “Crankshaft Rear Oil Seal”.

10. Install the flywheel.

• Along with the knock pin of the crankshaft,

install the flywheel and tighten up with the
prescribed torque according to the order given
on the figure.

Tighten:
Bolts to 
1st step: 78 N

⋅m (8.0 kg⋅m/57 lb⋅ft)

2nd step: 120

° – 150° (degrees)

N6A6075E

N6A6076E

N6A6077E

N6A6078E

6A-52   Engine Mechanical (4HK1-TC)

11. Turn the crankshaft in the normal direction of

engine rotation until the No. 1 or No. 4 cylinder is
at TDC on the compression stroke.
Refer to illustration.

Notice:
There are 2 timing marks on the crankshaft pulley. 
Mark (1) is near the front cover and is used to bring the
4HK1-TC engine to TDC.
Mark (2) is not applicable to this engine.
Be sure to use mark (1) when bringing the engine to
TDC.

12. Remove the oil drain adapter.
13. Install the O-ring on the fuel supply pump.
14. Align the slits as shown in the illustration.
15. Insert the stud bolts into the guides and

temporarily tighten them.

Caution:

• If the stud bolts (cylinder block side) have been

loosened or replaced, apply Loctite No. 262 to the
recessed portion of the bolts.

• Check if the meeting mark of the gear painted white

is at the location given on the figure when viewed
from the plug hole and tighten up with the
prescribed torque.

Tighten:
Nut to 50 N

⋅m (5.1 kg⋅m/36 lb⋅ft)

Bolt to 76 N

⋅m (7.7 kg⋅m/56 lb⋅ft)

• If the location of the teeth of the painted gear is not

in the right place, put it together all over again. 

Legend

1. Plug Hole
2. Meeting Mark

 

16. Install the adapter assembly: oil drain on the plug

hole and tighten up with the prescribed torque.

N6A6003E

N6A6002E

N6A6079E

N6A6080E