Chevrolet 1973 Overhaul Manual page 173

6 -3 2 ENGINE
Fig. 66—Removing C am shaft Gear
down cylinder to determine taper and turn it to
different points around cylinder wall to determine
the out-of-round condition. If cylinders were found
to exceed specifications, honing or boring will be
necessary (fig. 69).
Oil Filter Bypass Valve Inspection and
Replacement
In-Line Engines
With the oil filter removed, check the spring and fibre
valve for operation. Inspect for a cracked or broken
valve. If replacement is necessary, remove valve by
prying it out with a screw driver. Install and seat a new
valve by tapping it in place, using a 9/16 thin-wall deep
socket (fig. 70).
V8 Engines
With the oil filter removed, check the spring and fibre
valve for operation. Inspect for a cracked or broken
valve. If replacement is necessary, the oil filter adapter
and bypass valve assembly must be replaced as an
Fig. 67—Replacing C am shaft C enter Bearing
assembly. Clean valve chamber in cylinder block
thoroughly. Torque retaining screws to specifications (fig.
71).
Distributor Lower Bearing Replacem ent (In-
Line)
The distributor lower bearing is a bronze bushing
pressed into the lower side of the engine block. Its upper
inside diameter pilots the distributor shaft and the
outside diameter extending below the block pilots the oil
pump.
The lower bushing will ordinarily require only a
clearance or wear check during engine overhaul. When
distributor shaft-to-bushing clearance exceeds .0035" the
bushing should be replaced as follows;
1. With oil pump and distributor removed install Tool
J-9534 into bushing and using a slide hammer,
remove the bushing (fig. 72).
2. Clean bushing bore in block and check for burrs or
damage.
3. Using Tool J-9535 with driver-bolt in driver handle
install driver into new bushing from large inside
diameter.
IN LINE
OVERHAUL MANUAL