Chevrolet 70 1969 Series, Shop Manual

Page: 676 / 913

E N G IN E 6-5
REMOVING ROCKER ARMS
PUSH RODS AND LIFTERS
1. Remove covers from cylinder heads.
2. Loosen bolts attaching rocker arm shaft brackets to
cylinder heads. Bolts should be loosened in gradual
stages to relieve spring pressure from rocker arms.
3. Remove rocker arms, shafts, and brackets as assem ­
blies.
4. Remove push rods.
Figure 6 — R e m o v in g C r a n k s h a ft Pulley w ith S p e c ial Puller (Typical)
5. Remove cover and gasket from valve lifter chamber
between cylinder heads. Remove valve lifters. T ag or
m ark lifters so they m ay be reinstalled in original po­
sitions.
N O T E : Tool s h o w n in Figure 4 is d e s ig n e d to
lock into lifter a n d facilitate re m o val of lifters.
W h e n re m o v in g lifters w ith m a n ifo ld s installed,
b a c k out a n y m a n ifo ld bolts w h ich interfere
w ith lifter rem oval.
CYLINDER HEAD REMOVAL
1. Remove bolts attaching cylinder heads to cylinder
block, then remove cylinder heads.
2. Remove cylinder head gaskets and clean deposits
from pistons.
OIL PAN AND OIL PUMP REMOVAL
1. Drain oil from oil pan.
2. Remove oil pan bolts, then remove oil pan from
crankcase.
3. On engines so equipped, disconnect and remove hy­
draulic governor line. Remove the oil inlet screen and
pipe assembly from oil pump. Refer to Figure 49.
4. Remove oil pum p m ounting bolts and remove oil
pum p assembly and drive shaft.
1 Cylinder Block
2 Idler Gear Shaft
3 Oil Hole
4 Bolt
5 Crankshaft Gear
6
Lock Washer
7 Full Pressure Oil Gallery
Figure 7 — T im in g Idler G e a r S h a f t In stallation ( 4 0 1 M a n d 4 7 8 M E ngines)
1. Cylinder Block
2. Idler Gear Shaft
3. Oil Hole
4. Bolt
5. Crankshaft Gear
6. Lockwasher
7. Full Pressure Oil
Gallery
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK SH O P M A N U A L