Glow Plug Removal - Hummer H1 Service Manual

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2-54 Engine
Rocker Arm Cover Removal
1. Remove injection line support bracket from studs
(Figure 2-77).
2. Remove cover attaching bolts and studs.
3. Remove rocker arm cover. Tap cover with rubber mallet
and twist it to remove. Do not pry on cover.
4. Repeat procedure for opposite cover.
.
INJECTION LINE SUPPORT BRACKET
STUD
Figure 2-77: Rocker Arm Cover Removal
Rocker Arm Shaft and Pushrod Removal
1. Remove rocker arm retainers and bolts (Figure 2-78).
2. Mark or tag position of each rocker arm and shaft set
before removal.
3. Remove rocker arm and shaft sets from cylinder head.
4. Remove pushrods. Keep pushrods in removal order. Do
not intermix them.
5. Repeat procedure for opposite rocker sets.
PUSHROD
Figure 2-78: Rocker Arm and Shaft Removal
ROCKER ARM COVER
S02-084
RETAINER
AND BOLT
ROCKER ARM
AND SHAFT
SET (2 PER SIDE)
Fuel Injector Removal
1. Remove fuel return hoses and clamps from injectors
(Figure 2-79).
2. Remove fuel injectors and gaskets (Figure 2-79).
GASKET
CYLINDER HEAD
Figure 2-79: Fuel Injector Removal

Glow Plug Removal

Remove glow plugs from cylinder heads (Figure 2-80). Dis-
card any damaged plugs.
Figure 2-80: Glow Plug Removal
FUEL
INJECTOR
RETURN
HOSES
HOSE
PLUG
GLOW PLUG
®