Chevrolet 1973 Overhaul Manual page 147

6-6 ENGINE
E N G IN E ASSEM B LIES
Disassembly
NOTE: For partial disassembly of the engine
refer to the applicable "Chassis Service
Manual" under the part or sub-assembly to
be serviced. For complete disassembly of the
engine (into sub- assemblies) follow the
outline below.
1. With the engine mounted on an engine stand
(transmission and/or clutch housing removed from
the engine), remove the following sub-assemblies (if
applicable). Refer to the appropriate section of the
applicable "Chassis Service Manual."
—Air Injection Reactor System (with brackets).
—Delcotron (with brackets).
—Accessory Drive Pulley(s) (and belts).
—Water Pump (and by pass hose).
—Fuel Pump (and fuel pump push rod on V8
engines).
—Distributor Cap (with spark plug wires).
—Carburetor (and fuel lines).
—Oil Filter.
—Starter.
—Clutch Pressure Plate and Disc.
—Ground Strap.
—Oil Dip Stick and Oil Dip Stick Tube.
2. Remove intake and exhaust manifolds.
3. On In-Line engines, remove push rod covers.
4. Loosen valve rocker arm nuts until rocker arms can
be pivoted, then remove push rods and valve lifters.
Place push rods and valve lifters in a rack so they
may be installed in the same location during engine
assembly.
5. Remove the cylinder head(s).
6. Using Tool J-23523, remove the torsional damper.
7. Remove the oil pan.
8. Remove crankcase front cover.
9. On the performance engines, remove the oil baffle.
10. Remove oil pump and screen assembly. On V8
engines, remove the extension shaft.
11. Check connecting rods and caps for cylinder
number identification and if necessary, mark them.
Check cylinder bores for ridge and if necessary,
remove ridge.
12. Remove connecting rod caps and using connecting
rod guide set, Tool J-5239 (3/8") or J-6305 (11/
32"), push connecting rod and piston assemblies out
of block.
REPAIR PROCEDURES
13. Remove the camshaft as follows:
WITH TIMING CHAIN (V8)
— Remove camshaft sprocket bolts then remove
camshaft sprocket and timing chain.
—Install two 5/16-18 bolts in camshaft sprocket bolt
holes and carefully remove camshaft.
WITH TIMING GEAR (In-Line)
—Remove camshaft thrust plate screws (through
holes in camshaft gear), then remove camshaft and gear
as an assembly.
14. Remove the flywheel.
15. Remove main bearing caps and lift crankshaft out
16. Remove rear main bearing oil seal from cylinder
17. Discard all gaskets and seals removed during
Assembly
1. Install the crankshaft as follows:
a. Install rear main bearing oil seal in cylinder
b. Lubricate lips of seal with engine oil. Keep oil
c. Install main bearings in cylinder block and main
NOTE: It will be necessary to turn the
crankshaft to disconnect and remove some of
the connecting rod and piston assemblies.
Use care in removing camshaft to
CAUTION:
avoid damaging bearings.
NOTE: Sprocket is a light press fit on
camshaft. To dislodge, tap lightly on lower
edge of camshaft sprocket with a plastic
hammer.
NOTE: Refer to Truck Chassis Service
Manual for removal and installation proce­
dures of 292 cu. in. engine flywheel.
of cylinder block.
block and rear main bearing cap.
engine disassembly.
NOTE: For further disassembly, cleaning
and inspection refer to the part or sub-
assembly to be serviced.
NOTE: For inspection, repair, assembly or
replacement of any engine part or sub-
assembly refer to this section under the part
or sub- assembly being serviced. Use new
gaskets and seals on engine assembly.
block and rear main bearing cap grooves. Install
with lip of seal toward front of engine. Where
seal has two lips install lip with helix towards
front of engine.
off parting line surface.
bearing caps then lubricate bearing surface with
engine oil.
OVERHAUL MANUAL