Isuzu NKR 4J Series - Valvestem Oil Controller and Valve Spring Installation

4JB1/4JB1T/4JB1TC/4JG2 – ENGINE 6A1 – 21
4. Valve Guide Oil Seal
• Removal valve guide oil seal by pliers.
CAUTION
• Removed oil controller should not be reused.
INSTALLATION
4. Valve Guide Oil Seal
• Install new valve guide oil seal in valve.
• Guide using special tool.
Special tool: 5-8840-2033-0
3. Valve Spring
• Attach the valve spring to the upper spring seat.
CAUTION
• The painted area of the valve spring should be facing
toward.
• Apply compressed air to cylinder from the glow plug
hole to hold the valve in place.
• Install split collar by special tool.
Valve spring compressor: 9-8523-1423-0 (J-29760)
2. Rocker Shaft Assembly
• Install rocker arm shaft with a larger oil hole (φ4) to the
front of engine.
• Align fixing bolt with not of rocker arm shaft and
tighten fixing bolt to the specified torque.
N∙m (kg∙m/lb∙ft)
54 (5.5/40)
• Valve clearance adjustment
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