Isuzu N-Series. Service 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
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