Valve Train Component R Em Oval - GMC 1989 Light Duty Truck Repair Manual

VALVE TRAIN COMPONENT
REMOVAL
Tools Required:
J 34144-A Rocker Arm Cover Remover
J 3049 Valve Lifter Remover (Plier Type)
|+->| R em ove or D isconnect (Figures 2, 3, 9, 10, 11,
----- and 12)
1. Rocker arm cover bolts.
J-3 4 1 4 4 -A
J -3 4 1 4 4 -A
Figure 9 — R em oving th e R ocker Arm C over
2.5 LITER L4 ENGINE 6A1-9
A. 22 mm (7/s")
B. 55 mm (21 /s")
C. 4 0 m m ( 1 1 /2")
D. 10 mm (3/a")
25 mm (1") Deep
Holes for Pushrods
E. 22 mm (7/s") Drill
25 mm (1") Deep
Holes for Valve
Lifters
F. 50 mm
(2"
x
G. 50 mm (2") Pegs for
Rocker Arms
and Balls
Figure
2. Rocker arm cover. Use J 34144-A (figure 9).
3. Bolts (31), balls (32), rocker arms (33), pushrods (47)
and pushrod guides (45).
• Every effort should be made to insure that
4. Pushrod cover nuts, studs, and the cover (50).
• U n s c re w th e fo u r n u ts fro m th e c o v e r
• After breaking the cover loose, remove the
5. Retainers (123).
6. Hydraulic lifter guides (122).
7. Hydraulic lifters.
• Remove the valve lifters one at a time and
F-04483
• A stuck valve lifter can be removed using
155 mm
x
6") Lumber
10— Valve Train Component Rack
these m ating parts are installed 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
10
.
attaching studs, reverse two of the nuts so the
washers face outward and screw them back
onto the inner two studs. Assemble the two
remaining nuts to the same two inner studs
with washers facing inward. Using a small
wrench on the inner nut, on each stud, jam the
two nuts tightly together. Again, using the
small wrench on the inner nut, unscrew the
studs until the cover breaks loose.
jam m ed nuts from each stud. Remove the
cover from the studs.
place them in the organizer rack. The valve
lifters must be installed in the same bore from
which they were removed.
J 3049.
F-01988