Chevrolet 10 Series 1968, Service Manual

Page: 385 / 713

ENGINE 6-38
366 an d 4 2 7 cu. in. Engines
1. Install the camshaft and gear assembly in the engine
block, being careful not to damage camshaft bear­
ings on camshaft.
2. Turn crankshaft and camshaft so that the valve tim­
ing marks on the gear teeth will line up (fig. 47).
Push camshaft into position. Install camshaft thrust
plate to block screws and torque to specifications.
3. Check camshaft and crankshaft gear run out with a
dial indicator (fig. 24V). The camshaft gear run out
should not exceed .004” and the crankshaft gear run
out should not exceed .003".
4. If gear run out is excessive, the gear will have to be
removed and any burrs cleaned from the shaft or
the gear will have to be replaced.
5. Check the backlash between the timing gear teeth
with a dial indicator (fig. 25V). The backlash should
not be less than .004" nor more than .006".
6. Lubricate timing gears with engine oil.
7. Install fuel pump push rod as outlined in Section 6M.
8. Install grille as outlined in Section 13.
9. Install crankcase front cover as outlined.
10. Install valve lifters as outlined.
Timing Gears
Replacement
366 and 4 2 7 cu. in. Engines
With camshaft removed crankshaft gear may be re ­
moved using Tool J- 8105 (fig. 26V). To install crankshaft
gear use Tool J -21058 (fig. 27V). For camshaft gear re­
placement refer to Section 6, "Camshaft Disassembly”
of the Overhaul Manual.
Flywheel
Removal
With transmission and/or clutch housing and clutch
removed from engine, remove the flywheel.
F ig . 2 6 V —Removing Crankshaft G ear
F ig . 2 7 V —In stalling Crankshaft G ear
F ig . 2 5 V —C h eckin g Timing G ear Backlash
Installation
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 crankshaft flange and flywheel
(fig. 28V).
CONVERTER
BOLT AREA
DEPRESSED
RING
GEAR
TRANS.^ ENGINE
WELDS
AUTOMATIC
SYNCHROMESH
F ig . 2 8 V —Flyw heel Installation (T yp ica l)
CHEVROLET TRUCK SERVICE MANUAL