Rocker Arm Cover Removal; Valve Train Component Removal - GMC 1989 Light Duty Truck Repair Manual

Figure 4— Exhaust Manifold (5.0L and 5.7L Engines)

ROCKER ARM COVER REMOVAL

R em ove or D isconnect (Figure 9)
1
. N uts (30), clips (35), and reinforcem ents (31) or
bolts (36) and w ashers (37).
2
R ocker arm covers (32). If the rocker arm cover
.
adheres to the cylind er head, try to shear the
gasket by bum ping the end of the cover w ith a
rub be r m allet. If the cover will not com e loose,
ca re fully pry until loose. DO NOT DISTORT THE
SEALIN G FLANGE.
3. G askets (34).
VALVE TRAIN COMPONENT
REMOVAL
Rem ove or D isconnect (Figures 10 through 13)
Tools R equired:
J 3049 Valve Lifter Remover (Plier Type)
C A ST IR O N M A N IF O L D
S T A IN L E S S STEEL
M A N IF O L D
1. E xh a u st M a n ifo ld
4. B o lt/S tu d
6. S p ark Plug W ire H eat S h ie ld
Figure 5— Exhaust Manifold (7.4L Engines)
J 9290-01 Valve Lifter Remover
(Slide Hammer Type)
1. Nuts (40), balls (41), rocker arms (42) and pushrods
(43).
— Note that on 7.4 L engines, the exhaust valve
pushrods are longer than the intake valve
pushrods.
— Every effort should be made to insure that
these m ating parts are in sta lle d in th e ir
original locations during assembly. A simple
valve train component organizer rack can be
made from a piece of wood, as shown in figure
11
.
2. Hydraulic lifters (44).
— Remove the lifters one at a time, using a
magnet. Place the lifters in the organizer rack,
or tag them in some way to insure that they
can be returned to the valve lifter bore from
which they were removed.
V8 ENGINE 6A5-7