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Isuzu A-4JB1 Repair Manual

Isuzu A-4JB1
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ENGINE ASSEMBLY ( 2 )
Tappet and Cylinder Body Clearance mm(in)
Standard Limit
0.03 (0.0012) 0.1 (0.0039)
62
Push Rod Curvature
1. Lay the push rod on a surface plate.
2. Roll the push rod along the surface plate and mea-
sure the push rod curvature with a thickness gauge.
If the measured value exceeds the specified limit,
the push rod must be replaced.
Push Rod Curvature mm(in)
Limit
0.3 (0.012)
3. Visually inspect both ends of the push rod for
excessive wear and damage. The push rod must be
replaced if these conditions are discovered during
inspection.
CAMSHAFT
Visually inspect the journals, the cams, the oil pump
drive gear, and the camshaft bearings for excessive
wear and damage. The camshaft and the camshaft
bearings must be replaced if these conditions are
discovered during inspection.
Camshaft Journal Diameter
Use a micrometer to measure each camshaft journal
diameter in two directions ((X X) and (Y Y)). If the
measured value is less than the specified limit, the
camshaft must be replaced.
Camshaft Journal Diameter mm(in)
Standard Limit
49.945 49.975 49.60
(1.9663 1.9675) (1.953)
X
X
YY

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Isuzu A-4JB1 Specifications

General IconGeneral
BrandIsuzu
ModelA-4JB1
CategoryEngine
LanguageEnglish

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