V-8 Engine - Service; Cylinder Block; Cylinder Head - Pontiac Grand Prix Service Manual

6-38
1969 PONTIAC SERVICE
MANUAL
CONTENTS O F THIS SECTION
SUBJECT PAGE SUBJECT PAGE
General Description.
. . . . . . . . . . . . . .
6-38
Periodic Service
. . . . . . . . . . . . . . . .
6-40
Service Operations on C a r .
. . . . . . . . . .
6-40
Engine Insulators
-
Remove and Replace.
. .
6-40
Drive Belts
-
Adjust
. . . . . . . . . . . . . .
6-42
Engine
-
Remove and Install.
. . . . . . . . .
6-42
Manifold
-
Valve Trains
-
Cylinder Heads.
.
6-44
Right Side Exhaust Manifold o r Gasket
-
Remove and Replace
. . . . . . . . . . . .
6-44
Left Side Exhaust Manifold o r Gasket
-
Remove and Replace
. . . . . . . . . . . .
6-45
Intake Manifold o r Gasket
-
Remove and Replace
. . . . . . . . . . . .
6-45
Push Rod Cover o r Gasket
-
Remove and Replace
. . . . . . . . . . . .
6-46
Valve Springs, Shield o r Seal
-
Remove and Replace
. . . . . . . . . . . .
6-46
Push Rod and Valve Lifter
-
Remove and Replace
. . . . . . . . . . . .
6-47
Cylinder Head o r Gasket
-
Remove and Replace
. . . . . . . . . . . .
6-50
Rocker Arm Studs
-
Remove and Replace
.
6-51
Cylinder Head and Valve
-
Recondition.
. .
6-52
Valves and Seats
-
Recondition
. . . . . . .
6-53
Harmonic Balancer
-
Timing Chain Cover
and Gasket
-
Timing Chain and
Sprockets
-
Oil Seal
-
Fuel Pump
Eccentric
. . . . . . . . . . . . . . . . . . .
6-
54
Camshaft and/or Camshaft Bearing
-
Remove and Replace
. . . . . . . . . . . . .
6-
56
Oil Pan and/or Oil Pan Gasket
-
Remove and Replace
. . . . . . . . . . . . .
6-
59
Oil Pump
-
Recondition
. . . . . . . . . . .
6-61
Rear Main Bearing Oil Seal
-
Remove and Replace
. . . . . . . . . . . .
6-6
1
Main Bearings
-
Remove and Replace
. . .
6-63
Connecting Rod Bearings
-
Remove and Replace
. . . . . . . . . . . .
6-64
Connecting
Rod
and Piston Assembly
-
Remove and Replace
. . . . . . . . . . . .
6-65
Connecting
Rod
and Piston Assembly
-
Recondition
. . . . . . . . . . . . . . . . .
6-65
Piston Rings
-
Replace
. . . . . . . . . . .
6-69
Crankshaft
-
Remove and Replace
. . . . .
6-70
Fitted Block Assembly
-
Replace
. . . . .
6-72
Specifications
. . . . . . . . . . . . . . . . . .
6-77
Wrench Torque Specifications
. . . . . . . . .
6- 77
Special Tools
. . . . . . . . . . . . . . . . . .
6-82
GENERAL DESCRIPTION
CYLINDER BLOCK
V-8 engine is standard equipment on Pontiac, Grand
Prix and G.T.O. models, and optional on all Firebird
and Tempest models. The optional Tempest V-8 has
displacement of 350 cubic inches with 3 7/8" bore and
3 3/4" stroke.
T h i s
engine is available in two
compression ratios: 9.2: 1 and 10.5
:
1.
A 400 cubic inch V-8 engine is standard on the G.T.O.,
Grand Prix and all Pontiacs except Bonneville. This
engine has 4.120" bore and 3 3/4" stroke and is
available in three compression ratios: 8.6: 1, 10.5: 1 and
10.75: 1.
Both the 350 and 400 cubic inch V-8 engines are
optional on the Firebird model.
A large valve 428 cubic inch V-8 engine is standard on
all
Bonneville models (with manual transmission) and
the Grand
Prix "SJ".
The large valve 428 cubic inch
V-8 engine is optional on all other Pontiac models, as
well as the Bomeville with automatic transmission. A
s m a l l valve version of the 428 cubic inch engine is
standard on Bomeville models with automatic trans-
mission. These engines have a 4.120" bore and 4"
stroke. The compression ratio is 10.5:l with a 428 high
output engine, optional on all Pontiacs and the Grand
k
at 10.75: 1.
The cylinder block used for 400 and 428 engines has
three core hole plugs on each side and is more rigid
with improved machining. Cylinder blocks for the 350,
400 and 428 engines are shown in Figs. 6-67,6-68.
Except for the small valve 428 engine standard in
Bomeville models with automatic transmission, all 428
cubic inch and 400 cubic inch Ram-Air engines have
four attaching bolts in the three center main bearing
caps as compared to two bolts per cap in other
engines. The standard Bonneville small valve 428
cubic inch engine also has only 2 attaching bolts. Fig.
6-68 shows the four-bolt cap installation.
CYLINDER HEAD
Two types of cylinder heads differing in valve sizes
and valve seat angle are used (Figs. 6-69 and 6-70).
Both types have fully machined combustion chambers.
Valve guides are cast integral with the cylinder head
and valve heads are surrounded by water jackets.
All small valve cylinder heads are new for 1969. The
small valve cylinder heads in each cubic inch displace-
ment have been redesigned to reflect the use of revised
valve face angles. The valve seat angle in the head has