Isuzu NPR 4J Series User Manual

4JB1/4JB1T/4JB1TC/4JG2 – ENGINE 6A1 – 13
INSPECTION
Relief Valve
1. Attach an oil pressure gauge to the oil gallery near the
oil filter.
2. Start the engine to check the relief valve opening
pressure.
Relief Valve Opening Pressure kPa (kg/cm
2
/psi)
Type1 559-618 (5.7-6.3/81.0-89.6)
Type2 422-461 (4.3-4.7/61.1-66.8)
Oil Cooler
Check for water leakage at the water passage.
1. Plug one side of the oil cooler water passage.
2. Submerge the oil cooler in water.
3. Apply compressed air (2 kg/cm
2
(28.5psi/196.0kPa)) to
the other side of the oil cooler water passage.
If air bubbles rise to the surface, there is water
leakage.
INSTALLATION
3. Oil Cooler
• Install the O-ring to oil filter body and set the oil cooler.
2. Oil Cooler Fixing Bolt
Oil Cooler Bolt Torque N∙m (kg∙m/lb∙ft)
29 (3.0/22)
1. Water Hose
• Connect water hose.
6A1-13-1.tif
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6A1-13-3.tif

Isuzu NPR 4J Series Specifications

General

Brand	Isuzu
Model	NPR 4J Series
Category	Engine
Language	English