Chevrolet 1973 Overhaul Manual page 149

6-8 ENGINE
c. Draw camshaft sprocket onto camshaft, using
the mounting
specifications.
d. Lubricate timing chain with engine oil.
WITH TIMING GEAR (In Line)
a. Lubricate camshaft journals with engine oil,
then rotating crankshaft and camshaft so that
marks on gears will line up, install camshaft and
gear assembly being careful not to damage
bearings (fig. 7).
b. Check camshaft and crankshaft gear run out
with a dial indicator (fig 8). The camshaft gear
run out should not exceed .004", and the
crankshaft gear run out should not exceed .003".
c. Check the backlash between the timing gear
teeth with a dial indicator (fig. 9). The backlash
should be not less than .004" nor more than
.006".
d. Lubricate timing gears with engine oil.
4. Install connecting rod and piston assemblies as
follows:
a. Install connecting rod bearings in connecting
rods and connectiong rod caps then lubricate
bearings, pistons, piston rings, connecting rod
bolts and cylinder walls lightly with engine oil.
b. Install connecting rod guide set Tool J-5239 (3/
8") or Tool J-6305 (11/32") on connecting rod
bolt and using Tool J-8037 to compress the
rings, install number one connecting rod and
piston assembly in its respective bore. Use a
hammer handle and light blows. Hold the ring
compressor firmly against the cylinder block
until all piston rings have entered the bore.
Be sure ring gaps are properly
CAUTION:
TIMING
MARKS
THRUST
PLATE
SCREWS
Fig. 7 -T im in g Gear A lig n m e n t M arks
bolts. Torque bolts to
Pig 8—
Checking T im in g Gear Runout
Fig. 9—Checking T im in g Gear Backlash
positioned on piston and piston is properly
positioned in cylinder block. Refer to Figures
57, 59 and 60.
c. Remove connecting rod guide set then install
connecting rod cap and torque nuts to specifica­
tions. Repeat Step b and c for the-remaining
connecting rod and piston assemblies.
d. Measure connecting rod side clearance (see
specifications). Measure between connecting rod
caP and side of crankpin on In Line engines
OVERHAUL MANUAL