Valve Guide; Manifold Fitting Face Warpage; Valve Stem And Valve Guide Clearance; Valve Guide Replacement - Isuzu A-4JA1 Workshop Manual

Manifold Fitting Face Warpage

Standard
0.05
(0.002) or less

VALVE GUIDE

Valve Stem and Valve Guide Clearance

Measuring Method - I
1. With the valve stem inserted in the valve guide, set
the dial indicator needle to "0".
2. Move the valve head from side to side.
Read the dial indicator.
Note the highest dial indication.
If the measured values exceed the specified limit,
the valve and the valve guide must be replaced as a
set.
Valve Stem Clearance
Intake Valve
(0.0015 – 0.0027)
Exhaust Valve
(0.0025 – 0.0038)
Measuring Method - II
1. Measure the valve stem outside diameter.
Refer to the Item "Valve Stem Outside Diameter".
2. Use a caliper calibrator or a telescoping gauge to
measure the valve guide inside diameter.

Valve Guide Replacement

Valve Guide Removal
Use a hammer and the valve guide replacer to drive out
the valve guide from the cylinder head lower face.
Valve Guide Replacer: 9-8523-1212-0
ENGINE ASSEMBLY ( 2 )
Maximum Grinding
Limit
Allwance
0.2 (0.008) 0.4 (0.016)
Standard
0.039 – 0.069
0.064 – 0.096
mm (in)
mm(in)
Limit
0.20
(0.008)
0.25
(0.0098)
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