Cadillac 60 Series 1963 Shop Manual page 194

ENGINE MECHANICAL
1-1
GENERAL DESCRIPTION
The engine in all 1963 series Cadillac cars is of
the overhead valve 90°, V-eight design. The
cylinder bore diameter is 4 inches and the piston
stroke is 3-7/8 inches, providing a piston dis-
placement of 390 cubic inches. The engine has a
compression ratio of 10.5 to 1, and develops 325
horsepower at 4,800 RPM. Peak torque of 430
foot pounds is developed at 3,100 RPM. A three-
quarter view of the engine is shown in Fig. 9-1.
Design Features
The new lighter weight cast iron cylinder block
is designed with two 90° cylinder banks with four
cylinder bores in each bank.
Cylinder numbering is by cylinder arrangement.
The left front cylinder is number one, and the
right front is number two. Cylinders on the left
bank have odd numbers (1, 3, 5, and 7) and those
on the right bank are even (2, 4, 6, and 8).
The firing order is 1, 8, 7, 2, 6, 5, 4, 3.
The die cast aluminum engine front cover is
designed with mounting provisions for the oil
pump, oil filter, oil filler tube, fuel pump, distri-
butor, and water pump, to provide a new, front
end accessory drive arrangement.
The cast crankshaft with three inch journals is
supported by five shell type main bearings of
steel-backed aluminum and steel-backed babbitt.
End thrust of the crankshaft is taken by the center
main bearing. Six counter-weights are integral
with the crankshaft. A harmonic balancer is
pressed on the front end of the crankshaft.
Connecting rods for pistons of opposite cylin-
ders are carried side by side on the same crank-
pin. Shell type connecting rod bearings are of
steel-backed aluminum.
The cast aluminum pistons are designed with a
T-slot in the oil ring groove to give a shorter
head but still use two compression rings and one
oil ring. To provide a non-scuffing surface when
the engine is new, the pistons are tin-plated. A
trough on the top of each piston increases the
turbulence of the fuel mixture in the combustion
chamber for better combustion, and also provides
valve clearance.
Piston pins are press-fitted into the connecting
rods. Holes drilled from each piston skirt into
the piston pin bore direct oil from the cylinder
wall to the piston pin to provide adequate
lubrication.
Fig. 9-1 Engine Three Quarter View