Chevrolet 10 series 1973, Руководство по капитальному ремонту

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6-6 ENGINE
REPAIR PROCEDURES
E N G IN E A S SE M B LIE S
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.
NOTE: It will be necessary to turn the
crankshaft to disconnect and remove some of
the connecting rod and piston assemblies.
13. Remove the camshaft as follows:
CAUTION:
Use care in removing camshaft to
avoid damaging bearings.
WITH TIMING CHAIN (V8)
—Remove camshaft sprocket bolts then remove
camshaft sprocket and timing chain.
NOTE: Sprocket is a light press fit on
camshaft. To dislodge, tap lightly on lower
edge of camshaft sprocket with a plastic
hammer.
—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.
NOTE: Refer to Truck Chassis Service
Manual for removal and installation proce­
dures of 292 cu. in. engine flywheel.
15. Remove main bearing caps and lift crankshaft out
of cylinder block.
16. Remove rear main bearing oil seal from cylinder
block and rear main bearing cap.
17. Discard all gaskets and seals removed during
engine disassembly.
NOTE: For further disassembly, cleaning
and inspection refer to the part or sub-
assembly to be serviced.
Assembly
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.
1. Install the crankshaft as follows:
a. Install rear main bearing oil seal in cylinder
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.
b. Lubricate lips of seal with engine oil. Keep oil
off parting line surface.
c. Install main bearings in cylinder block and main
bearing caps then lubricate bearing surface with
engine oil.
OVERHAUL MANUAL