Inspection And Repair - Isuzu AA-6HK1T Workshop Manual

6A–28 ENGINE MECHANICAL
1. Disassemble the rocker arm and shaft assembly.
• Loosen the rocker arm shaft fixing bolts (1).
• Disassemble the bracket, rocker arm, washer and
rocker arm shaft.
NOTE: Keep each rocker arm and bracket in order so
that they can be reinstalled to their original positions.
1
2

Inspection and Repair

Make the necessary adjustments, repairs, and part
replacements if excessive
discovered during inspection.
Rocker Arm Shaft Run-Out
1. Place the rocker arm shaft on V-blocks.
2. Use a dial indicator to measure the rocker arm shaft
central portion run-out.
If the run-out is very slight, correct the rocker arm
shaft run-out with a bench press. The rocker arm
must be at cold condition.
If the measured rocker arm shaft run-out exceeds
the specified limit, the rocker arm shaft must be
replaced.
Rocker arm shaft run-out
Limit: 0.3 mm (0.012 in.)
014EY00158
wear or damage is
Rocker Arm Shaft Outside Diameter
Use a micrometer to measure the rocker arm fitting
portion outside diameter.
If the measured value is less than the specified limit, the
rocker arm shaft must be replaced.
Rocker arm shaft outside diameter
Standard: 21.979 – 22.000 mm (0.865 – 0.866 in.)
Limit: 21.85 mm (1.0860 in.)
014EY00073
014EY00074