Engine Mechanical; In-Line Engines; Engine Assembly - Chevrolet 10 1971 Series Chassis Service Manual

ENGINE 6-14
*
G e ne ra l D e s c r i p t i o n .............................................................................6-14
C om ponent R e p la c e m e n t and A d ju s t m e n t .....................................6-14
Engine A s s e m b l y ................................................................................6-14
R e m o v a l ............................................................................................ 6-14
I n s t a l l a t i o n .................................. ................................................... 6-15
M a n ifo ld A s s e m b ly .............................................................................6-16
R e m o v a l ............................................................................................6-16
I n s t a l l a t i o n ......................................................................................6-16
R o c k e r A r m C o v e r .............................................................................6-16
R e m o v a l ............................................................................................6-16
I n s t a l l a t i o n ......................................................................................6-16
V alv e M e c h a n is m ................................................................................6-16
R e m o v a l ............ . ............................................................................6-16
In s ta lla tio n and A d ju s tm e n t ....................................................... 6-16
V alve L i f t e r s ......................................................................................6-17
L o c a tin g N o isy L i f t e r s ................................................................ 6-17
R e m o v a l ............................................................................................6-18
I n s t a l l a t i o n ......................................................................................6-18
V alve Stem O il Seal a n d /o r V alve S p r i n g ...............................6-18
R e p la c e m e n t ...................................................................................6-18
C y lin d e r H ead A s s e m b lie s ................................................. .............. 6-18
R e m o v a l ............................................................................................6-18
I n s t a l l a t i o n ..................................................................................... 6-19
O il P a n ......................................................................... .......................... 6-19
R e m o v a l ............................................................................................6-19
I n s t a l l a t i o n ......................................................................................6-19
The In-Line engines covered in this section are the 250
and 292 cu. in. L6 engines used in 10-30 Series truck
vehicles.
This section covers the removal and installation of en­
gine assemblies, the removal, installation and adjustment
of some sub-assemblies and replacement of some com­
ponents. For service
assemblies (after removal) and r e m o v a l
sub-assemblies, refer to Section 6 of the Chassis Over­
haul Manual.
COMPONENT REPLACEMENT A N D ADJUSTMENT

Engine Assembly

Removal
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.

ENGINE MECHANICAL

IN-LINE ENGINES

Page
GENERAL DESCRIPTION
to all components and sub-
of some
INDEX
O il P u m p ...............................................................................................6 -1 9
R e m o v a l ............................................................................................6 -1 9
I n s t a l l a t i o n ......................................................................................6 -1 9
O il Seal (R e a r M a in ) ......................................................................... 6 -1 9
R e p la c e m e n t ...................................................................................6 -1 9
T o rsio n a l D a m p e r ............................................................................ ..6 -2 0
R e m o v a l ............................................................................................6 -2 0
I n s t a l l a t i o n ..................................................................................... 6-2 0
C rankcase F ro n t C o v e r ................................................................... 6 -2 1
R e m o v a l ........................................................................................... 6 -2 1
I n s t a l l a t i o n ..................................................................................... 6 -2 1
O il Seal (F ro n t C o v e r)...................................................................... 6 -2 2
R e p la c e m e n t ...................................................................................6 -2 2
C a m s h a f t ...............................................................................................6 -2 2
M e a su rin g Lobe L i f t ................................................................... 6 -2 2
R e m o v a l ............................................................................................6 -2 3
I n s t a l l a t i o n ......................................................................................6 -2 3
T im in g G e a r s ..................................................................................... 6 -2 3
R e p la c e m e n t .................................................................................. 6 -2 3
F l y w h e e l ...............................................................................................6 -2 3
R e m o v a l ............................................................................................6 -2 3
I n s t a l l a t i o n ......................................................................................6 -2 3
Engine M o u n ts ......................................................................................6 -2 4
R e p lac e m e n t ( F r o n t ) ................................................................... 6 -2 4
R e p lac e m e n t ( R e a r ) ...................................................................... 6 -2 4
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 illus­
trations or procedures are necessary to clarify the
operation). Although illustrations showing bench opera­
tions are used, most single operations, when not part of a
general overhaul, should be performed (if practical) with
the engine in the vehicle.
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)
• Power steering pump at engine bracket and lay
aside (if so equipped).
• Ground straps at engine.
• Exhaust pipe at manifold.
Page
10-30 CHEVROLET TRUCK SERVICE MANUAL