Chevrolet 1988 Light Duty Truck Repair Manual page 361

VALVE TRAIN COMPONENT
REMOVAL
Tools Required:
J 34144-A Rocker Arm Cover Remover
J 3049 Valve Lifter Remover (Plier Type)
|<~+| R em o ve or D isco n n ect (F ig u re s 2, 3, 9, 10, 11,
and 12)
1. Rocker arm cover bolts.
J-34144-A
J-34144-A-
Figure 9 — Removing the Rocker Arm Cover
2.5 LITER L4 ENGINE 6A1-9
A.
22 m m (7/s")
B.
55 m m (21 /s")
C.
40 m m (1 V
D.
10 m m (3/s")
25 m m (1 ") D eep
H o le s fo r P u s h ro d s
E.
22 m m (7/s") D rill
25 m m (1 ") D eep
H o le s fo r Valve
L ifte rs
F.
50 m m x 155 m m
(2" x 6 ") L u m b e r
G. 50 m m (2 ") P egs fo r
R o c k e r A rm s
and B a lls
Figure 10— Valve Train C om ponent Rack
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
th e se m a tin g p arts are in s ta lle d in th e ir
original locations during assem bly A sim ple
valve train com ponent organizer rack can be
made from a piece of wood, as shown in figure
10
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
attaching studs, reverse two of the nuts so the
washers face outward and screw them back
onto the inner two studs. Assem ble the two
rem aining 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 tig h tly together. Again, using the
small wrench on the inner nut, unscrew the
studs until the cover breaks loose.
• After breaking the cover loose, remove the
jam m ed nuts from each stud. Remove the
cover from the studs.
5. Retainers (123).
6. Hydraulic lifter guides (122).
7. Hydraulic lifters.
• Remove the valve lifters one at a tim e and
place them in the organizer rack. The valve
lifters must be installed in the same bore from
F-04483
w hich they were removed.
• A stuck valve lifter can be removed using
J 3049.
A B
6
0
O
y
o
O
O
2
")
o O
o O
o
O CXo
o
.
O-
o
o
o
o
o
F-01988
th e c o v e r