Chevrolet 10 1971 Series Chassis Service Manual page 214

ENGINE 6-36
slowly, or attach an auxiliary starter switch and
"bump" the engine over, until the push rod is in
fully raised position.
The distributor primary lead must
CAUTION:
be disconnected from the negative post on the
coil and the ignition switch must be in the on
position. Failure to do this will result in a
damaged grounding circuit in the ignition switch.
5. Compare the total lift recorded from the dial indi­
cator with specifications.
6. Continue to rotate the engine until the indicator reads
zero. This will be a check on the accuracy of the
original indicator reading.
7. If camshaft readings for all lobes are within speci­
fications, remove dial indicator assembly.
8. Install and adjust valve mechanism as outlined.
Removal
1. Remove valve lifters as outlined
2. Remove crankcase front cover as outlined.
3. Remove g r i l l e (if
Section 13.
4. Remove fuel pump push rod as outlined in Section
6M.
5. Complete camshaft removal as follows:
Sprocket is a light fit on camshaft.
NOTE:
If sprocket does not come off easily a light blow
on the lower edge of the sprocket (with a plastic
mallet) should dislodge the sprocket.
6. Install two 5/16" x 18 x 4" bolts in camshaft bolt
holes then remove camshaft (fig. 19V).
All camshaft journals are the same
CAUTION:
diameter and care must be used in removing
camshaft to avoid damage to bearings.
Installation
Whenever a new camshaft is installed
NOTE:
coat camshaft lobes with " Molykote" or its
equivalent.
1. Lubricate camshaft journals with engine oil and in-
Fig. 19V — Removing Camshaft
necessary) as outlined
stall camshaft.
2. Install timing chain on camshaft sprocket. Hold the
sprocket vertically with the chain hanging down, and
align marks on camshaft and crankshaft sprockets.
(Refer to fig. 13V and 17V).
3. Align dowel in camshaft with dowel hole in cam­
shaft sprocket then install sprocket on camshaft.
4. Draw the camshaft sprocket onto camshaft using the
mounting bolts. Torque to specifications.
5. Lubricate timing chain with engine oil.
6. Install fuel pump push rod as outlined in Section 6M.
7. Install grille as outlined in Section 13.
8. Install crankcase front cover as outlined.
9. Install valve lifters as outlined.
Flywheel
Removal
With transmission and/or clutch housing and clutch
removed from engine, remove the flywheel.
Installation
in 1. Clean the mating surfaces of flywheel and crankshaft
to make certain there are no burrs.
2. Install flywheel on crankshaft and position to align
dowel hole of
(fig. 20V).
On Automatic Transmission equipped
NOTE:
engines, the flywheel must be installed with the
flange collar to transmission side (fig. 20V).
Coat thread end of bolts with sealer then install bolts
and torque to specifications.
Engine Mounts
Engine mounts (fig. 21V) are the non-adjustable type
and seldom require service. Broken or deteriorated
mounts should be replaced immediately, because of the
added strain placed on other mounts and drive line
components.
Front Mount Replacement
NOTE: If only one mount appears to be damaged
or deteriorated, check opposite mount for future
serviceability by raising engine sufficiently to
produce a light strain on rubber portion of
mount. Observe mount for signs of separation
and/or deterioration.
crankshaft flange and
10-30 CHEVROLET TRUCK SERVICE MANUAL
flywheel