Chevrolet 10 Series 1968, Service Manual

Page: 372 / 713

ENGINE 6-25
ENGINE MECHANICAL
V-8 ENGINES
INDEX
Page
General D e s c r ip t io n ............................................................. 6-25
Component Replacement and Adjustment ( V 8 ) ................ 6-25
Engine A s s e m b lie s ............................................................. 6-25
R e m o v a l............................................................................. 6-25
In s t a lla t io n ....................................................................... 6-27
Intake M a n ifo ld .................................................................... 6-28
R e m o v a l............................................................................. 6-28
In s t a lla t io n ....................................................................... 6-28
Exhaust Manifold ................................................................. 6-28
R e m o v a l............................................................................. 6-28
In s t a lla t io n ....................................................................... 6-28
Rocker A rm C o v e r ............................................................. 6-28
R e m o v a l............................................................................. 6-28
In s t a lla t io n ....................................................................... 6-29
V alve M ech anism .................................................................6-29
R e m o v a l............................................................................. 6-29
Installation and A d ju s t m e n t .......................................... 6-29
Valve L i f t e r s ...................................................................... 6-30
Locating N oisy L i f t e r s ....................................................6-30
R e m o v a l............................................................................. 6-30
In s t a lla t io n ....................................................................... 6-30
V alve Stem Oil Seal and/or Valve S p r i n g ................... 6-30
R e p la c e m e n t ....................................................................6-30
Cylinder Head A s s e m b lie s ................................................ 6-31
R e m o v a l............................................................................. 6-31
In s t a lla t io n ....................................................................... 6-31
Oil P a n .................................................................................6-31
R e m o v a l............................................................................. 6-31
In s t a lla t io n ....................................................................... 6-31
Page
Oil P u m p ............................................................................. 6-32
R e m o v a l............................................................................. 6-32
In s t a lla t io n ....................................................................... 6-32
Oil Seal (Rear M a in ).......................................................... 6-32
Replacem ent....................................................................... 6-32
Torsional D a m p e r ............................................................. 6-33
R e m o v a l............................................................................. 6-33
In s t a lla t io n ....................................................................... 6-33
Crankcase Front C o v e r ................................................... 6-34
R e m o v a l............................................................................. 6-34
I n s t a lla t io n ....................................................................... 6-34
Oil Seal (Front C o v e r ) ....................................................... 6-35
R eplacem ent................................ ...................................... 6-35
Timing Chain and/or S p r o c k e ts ....................................... 6-36
Replacem ent....................................................................... 6-36
C a m s h a ft ............................................................................. 6-36
Measuring Lobe L i f t ....................................................... 6-36
R e m o v a l............................................................................. 6-37
I n s t a lla t io n ....................................................................... 6-37
Tim ing G e a r s ....................................................................... 6-38
R eplacem ent....................................................................... 6-38
Flywheel ............................................................................. 6-38
R e m o v a l............................................................................. 6-38
I n s t a lla t io n ....................................................................... 6-38
Engine M o u n t s ....................................................................6-39
Replacement ( F r o n t ) ....................................................... 6-39
Replacement (R ear)
....................................................... 6-39
GENERAL DESCRIPTION
The V8 engines covered in this section are the 307,
327, 366, 396 and 427 cu. in. engines used in 10-60
Series Truck vehicles.
This section covers the removal and installation of
engine assemblies; the removal, installation and adjust­
ment 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 6 of the Truck Chassis
Overhaul Manual.
Because of the inter changeability and similarity of
many engines, engine sub-assemblies and parts regard­
less 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 engine in the vehicle.
COMPONENT REPLACEMENT AND ADJUSTMENT
Engine Assemblies
Rem oval
1. Disconnect battery cables and drain cooling system.
2. Remove the air cleaner.
3. Perform the following preliminary operations:
ON CE 10-20-30, KE 10-20 SERIES:
• Remove the hood as outlined in Section 11.
• Remove the radiator and shroud as outlined in
Section 13.
ON CE 40-50-60, KE 10-20, ME 50-60,
SE 50-60 SERIES:
• Remove the front end sheet metal (with hood and
radiator attached) as outlined in Section 11.
ON GE 10-20 SERIES:
• Remove engine splash shields.
• Disconnect neutral safety switch wire at connector
(Powerglide).
• Disconnect upper and lower radiator hoses at
radiator.
ON TE 40-50-60 SERIES:
• Remove the radiator, radiator support and shroud
as outlined in Section 13.
• Disconnect shaft linkage at control island.
• Disconnect choke cable at carburetor.
• Disconnect emergency brake cable at emergency
brake and retaining brackets.
CHEVROLET TRUCK SERVICE MANUAL