General Description; Component Replacement And Adjustment; Engine Assembly; Removal (C, K And P Series) - Chevrolet Light Duty Truck 1973 Service Manual

6 - 2 0 ENGINE
Measuring Lobe Lift ......................................................... 6-33
Removal .................................................. ........................... 6-34
Installation .......................................................................... 6-34
Timing Gears ...................................................................... 6-35
Replacement ...................................................................... 6-35
Flywheel ............................................................................... 6-35
The In-Line engines covered in this section are the 250
and 292 cu. in. L engines used in 10-30 Series truck
6
vehicles (fig. L).
1
This section covers the removal and installation of
engine assemblies, the removal, installation and
adjustment of some sub-assemblies and replacement of
some components. For service to all components and
sub-assemblies (after removal) and removal of some
sub-assemblies, refer to Section
Manual.
C O M PO N EN T REPLACEMENT A N D ADJUSTMENT

Engine Assembly

Removal (C, K and P Series)

1. Disconnect battery cables and drain cooling system.
2. Remove the air cleaner.
3. Perform the following preliminary operations.
ON CS 10-20-30, KS 10-20 SERIES:
Remove the hood as outlined in Section 11.
Remove the radiator and shroud as outlined in
Section 13.
ON PS 10-20-30 SERIES:
Remove the engine box and hood as outlined in
Section 11.
Remove the battery.
Remove the radiator and shroud as outlined in
Section 13.
4. Disconnect wires at:
Starter Solenoid.
Delcotron.
Temperature Switch.
Oil Pressure Switch.
Coil.
CEC Solenoid.
5. Disconnect:
Accelerator linkage at manifold bellcrank.
Fuel line (from tank) at fuel pump.
Heater hoses at engine connection.
Oil pressure gauge line (if so equipped).
Vacuum lines at engine (as required).

GENERAL DESCRIPTION

Because of the interchangeability and similarity of many
engine sub-assemblies and parts, regardless of which
truck vehicle they are used in, typical illustrations and
procedures are used (except where specific illustrations or
procedures are necessary to clarify the operation).
Although illustrations showing bench operations are
used, most single operations, when not part of a general
overhaul, should be performed (if practical) with the
of the Overhaul
6
engine in the vehicle.
Removal .............................................................................. 6-35
Installation .......................................................................... 6-35
Engine Mounts...................................................................... .6-36
Checking Engine Mounts ................................................ 6-36
Replacement (Front) ........................................................6-36
Replacement (Rear) ......................................................... 6-36
• Evaporation Emission System lines at carburetor.
• Power steering pump at engine bracket and lay
aside (if so equipped).
• Ground straps at engine.
• Exhaust pipe at manifold.
NOTE: Hang exhaust pipe at frame with
wire.
. Remove fan and pulley as outlined in Section
6
7. Remove clutch cross-shaft (if so equipped).
. Perform the following operations:
8
• Remove the rocker arm cover as outlined.
• Attach lifting device or chain to engine lifting
brackets and take engine weight off mounts.
ON ALL SERIES EXCEPT CS 10-20-30:
• Support transmission and disconnect from
engine. Refer to Section 7.
• Remove engine mount bolts.
ON CS 10-20-30:
• Remove propeller shaft as outlined in Section 4.
NOTE: If plug for propeller shaft opening in
transmission is not
transmission.
Disconnect TCS switch at transmission.
Disconnect speedometer cable at transmission.
Disconnect shift linkage at transmission.
Disconnect clutch linkage (as required).
Remove engine mount bolts.
Transmission cooler lines (if so equipped).
K.
6
available, drain