Cylinder Head; Cylinder Head Disassembly - Isuzu NHR 4J Series Workshop Manual

6A – 2 GENERAL ENGINE MECHANICAL

CYLINDER HEAD

NOTE:
•
During disassembly, be sure that the valve train
components are kept together and identified so
that they can be re-installed in their original
locations.
•
Before removing the cylinder head from the engine
and before disassembling the valve mechanism,
make a compression test and note the results.
DISASSEMBLY
1. Thermostat Housing Assembly
2. Injection Nozzle Holder (4JG2)
2a. Injection Nozzle Holder (4JB1, 4JB1TC)
1) Remove the nozzle holder bracket nuts.
6A-2-2.tif
Disassembly steps
1. Thermostat housing Assembly
2. Injection nozzle holder (4JG2)
2a. Injection nozzle holder (4JB1
4JB1TC)
3. Glow plug and plug connector
(4JG2)
3a. Glow plug and plug connector
(4JB1 4JB1TC)
4. Rocker arm shaft and rocker arm
5. Push rod
6. Cylinder head
Reassembly steps
To reassemble, follow the
disassembly steps in the reverse
order.
(4JB1)
6A-2-1.tif