Isuzu A-4JA1 User Manual

INSPECTION AND REPAIR
Make the necessary adjustments, repairs, and part replacements if excessive wear or damage is
discovered during inspection.
ENGINE ASSEMBLY ( 2 )
CYLINDER HEAD
Cylinder Head Lower Face Warpage
1. Use a straight edge and a feeler gauge to measure
the four sides and the two diagonals of the cylinder
head lower face.
2. Regrind the cylinder head lower face if the mea-
sured values are greater than the specified limit but
less than the maximum grinding allowance.
If the measured values exceed the maximum grind-
ing allowance, the cylinder head must be replaced.
Cylinder Head Lower Face Warpage mm(in)
Standard Limit
Maximum Grinding
Allwance
0.05
0.2 (0.008) 0.3 (0.012)
(0.002) or less
Cylinder Head Height (Reference) mm(in)
Standard Limit
91.95 (3.620) – 92.05 (3.624) 91.65 (3.60)
Note:
If the cylinder head lower face is reground, valve
depression must be checked.
EF
A
B
C
D
H
48
Exhaust Manifold Fitting Face Warpage
Use a straight edge and a feeler gauge to measure the
manifold cylinder head fitting face warpage.
Regrind the manifold cylinder head fitting faces if the
measured values are greater than the specified limit but
less than the maximum grinding allowance.
If the measured values exceed the maximum grinding
allowance, the cylinder head must be replaced.

Isuzu A-4JA1 Specifications

General

Brand	Isuzu
Model	A-4JA1
Category	Engine
Language	English