Cylinder Head Reassembly; Heat Shield Removal (4Jg2 Only); Heat Shield Installation (4Jg2 Only) - Isuzu NHR 4J Series Workshop Manual

6A – 6 GENERAL ENGINE MECHANICAL
CAUTION:
Do not apply pressure greater than that specified.
Damage to the cylinder head will result.
6. Use a surface grinder to grind off any hot plug surface
protuberances.
The hot plug surfaces must be perfectly flush with the
cylinder head.
7. After grinding, make sure that the hot plug surfaces
are completely free of protuberances.
The hot plug surfaces must also be free of
depressions.
Once again, lightly tap the hot plug heads to make sure
that they are firmly seated.
6A-6-1.tif

Heat shield removal (4JG2 only)

After removing the hot plugs, use a hammer
brass bar
#
and drive it free.
6A-6-2.tif

Heat shield installation (4JG2 only)

Install the heat shield washer and the heat shield to the
cylinder head from the nozzle holder installation hole side.
Lightly tap the flange into place with a brass bar.
The heat shield flange side must be facing up.
NOTE:
Always install a new heat shield. Never reuse the old
heat shield.
6A-6-3.tif
REASSEMBLY
6. Cylinder Head
1) Hot plug
• Set the nock ball in the positioning groove on the
cylinder head side according to the order of the
cylinders, and hit it lightly with a plastic hammer.
"
to lightly tap the lower side of the heat shield
!
and a