Isuzu N-Series. Manual - part 487

Engine Mechanical (4HK1-TC)   6A-53

Tighten:
Bolt to 8 N

⋅m (0.8 kg⋅m/69 lb⋅in)

• Apply engine oil over the O-ring nice and thin

and install it.

Legend

1. Adapter
2. O-ring

 

17. Install the cylinder head assembly.

Refer to “Cylinder Head”.

18. Install the camshaft assembly.

Refer to “Camshaft Assembly”.

19. Install the rocker arm shaft assembly.

Refer to “Rocker Arm Shaft Assembly”.

20. Install the cylinder head cover.

Refer to “Cylinder Head Cover”.

N6A6081E

6A-54   Engine Mechanical (4HK1-TC)

Torque Specifications

Special Tool

48 (4.9 / 35.4)

N6A6082E

Illustration

Tool Number / 

Description / Remarks

5-8840-2230-0 

(EN-47680)

Crankshaft Stopper

Engine Mechanical (4HK1-TC)   6A-55

Rocker Arm Shaft Assembly

Component

Legend

1. Camshaft Bracket
2. Rocker Arm
3. Wave Washer
4. Rocker Arm

5. Rocker Arm Bracket
6. Camshaft Bracket
7. Rocker Arm Shaft

 

Removal

1. Remove the cylinder head cover.

Refer to “Cylinder Head Cover”.

2. Remove the rocker arm shaft assembly.

• Along with the camshaft bracket, remove the

rocker arm shaft assembly.

N6A6083E

6A-56   Engine Mechanical (4HK1-TC)

• Keep the 2-bolts (arrowed in the figure) fixing

the rocker arm shaft to the camshaft bracket,
before removal of all the rocker arm brackets

Caution:
Pay full attention so as not to drop the bridge cap in the
gear case of the rear part of the cylinder head or the
hole into which oil pours back in the front.

Dismount

1. Remove the camshaft bracket.
2. Remove the rocker arm.
3. Remove the wave washer.
4. Remove the rocker arm.
5. Remove the rocker arm bracket.

• Repeat the procedure of (2) to (5).

6. Remove the camshaft bracket to take the shaft out.

Legend

1. Camshaft Bracket
2. Rocker Arm
3. Wave Washer
4. Rocker Arm
5. Rocker Arm Bracket
6. Camshaft Bracket
7. Rocker Arm Shaft

 

7. Check if the oil hole of the camshaft bracket (on

the rear side) is clogged.

8. Check if the rocker arm shaft is warpage.

• Place the rocker arm shaft on a V block.
• Mesure the runout of the rocker arm shaft with

a dial gauge on the center of the shaft.

• As a result of measurement, if its bend is slight,

press it to rectify it (do not heat).

• If the warpage of the shaft exceeds the limit,

replace the shaft.

N6A6084E

N6A6085E

N6A6086E