Pontiac And Grand Prix Engines; Engine Number And Code Location; Vehicle Identification Number Location - Pontiac Grand Prix Service Manual

Fig.
6-4
Engine Number and Code Location
-
6
Cyl.
PONTIAC AND GRAND PRlX ENGINES
The V-8 400 engine is used in all models except
Bonneville series which uses a 428 cubic inch (small
valve) engine and the Grand Prix "S.J." models which
also uses a 428 cu. in. (large valve) engine as standard.
Displacement of the 400 cubic inch engine is provided
by 4.120" bore and 3 3/4" stroke. The 428 and 428
(large valve) High Output are available on special
order. Displacement in the 428 cubic inch engine is
provided by 4.120" bore and 4" stroke.
Three
compression
ratios are available: 8.6:l on
regular fuel engines, 10.5:l on premium engines, and
10.75:l on 428 High Output.
Eight different Pontiac engine-transmission combina-
tions are available; these combinations and the major
components of each are shown in Fig. 6-1.
Fig.
6-5
Engine Number and Code Location
-
V-8
Seven different Grand Prix engine-transmission combi-
nations are available as shown on the engine chart
(Fig. 6-1). The standard engine is of 400 cubic inch
displacement with large valve heads (10.5:l C.R.) and
a 4 Bbl. carburetor. Engine identification is facilitated
by a letter code stamped below the production engine
number. By referring to Fig. 6-1 and using the
identification letters, major engine components can be
determined.
All V-8 engines feature completely machined combus-
tion chambers, overhead valves, ball pivot rocker arm
construction, harmonic balancer, hydraulic lifters,
aluminum pistons, straight valve guides, superior
crankcase ventilation and lubrication systems, and
large displacement combined with high compression
ratio for utmost performance and economy.
8-CYLINDER 6-CYLINDER
STAMP VEHICLE IDENTIFICATION
NUMBER CONSISTING OF THE
FIGURE 2 FOLLOWED BY THE
LAST 8 DIGITS OF THE CAR SERIAL
NUMBER.
Fig. 6-6 Vehicle Identification Number Location