Cadillac 60 Series 1963 Shop Manual page 231

9-38
ENGINE MECHANICAL
SPECIFICATIONS
All Series
Unless Other-
Items wise Noted
Bore 4"
Stroke 3-7/8"
Compression P r e s s u r e - -
At cranking speed
(throttle open) 165 to 185 psi
At 1000 rpm 212 to 230 psi
Compression Ratio 10.5 to 1
Horsepower--
Rated (Taxable) 51.2
Developed at 4800 rpm 325
Piston Displacement 390 Cu. In.
Points of Suspension 3
Torque, at 3100 rpm 430 Ft. Lbs.
VALVES, EXHAUST
Clearance between stem and guide--
New limits 0010" - .0025"
Worn limits, not over 005"
Clearance between lifter body
and crankcase 0005" - .0020"
Head diameter, overall 1.50"
Lift 450"
Valve Face Angle 44°
Valve Seat Angle (in head) 45°
Seat width in head 1/16"
Seat eccentricity, not over
(total indicator reading) 004"
Stem, diameter 3415" - .3420"
VALVES, INLET
Clearance between stem and guide--
New limits 0005" - .0025"
Worn limits, not over 005"
Clearance between lifter body
and crankcase 0005" - .0020"
Head diameter, overall 1.875"
Lift 450"
Valve Face Angle 44°
Valve Seat Angle (in head). . . . . . . . . 45°
Seat Width in head 1/16"
Seat eccentricity, not over
(total indicator reading) 004"
Stem, diameter 3415" - .3425"
VALVE SPRINGS
Free length 2.250"
Pounds required to compress
to 1.946" (Valve closed) . 60-65
Pounds required to compress
to 1.496" (Valve open) 155-165
All Series
Unless Other-
Items wise Noted
ROCKER SHAFT ASSEMBLY
Clearance between arm
and shaft--
New limits 0007" - .0022"
Worn limits. 003"
Clearance between shaft and
bracket 0002" - .0017"
Shaft Diameter 8108" - .8113"
Diameter of hole in arm 812" - .813"
Short Spring (Center)
Free length 3.73"
Pressure in pounds (when
compressed to 1.594") 10-1/2-12
Long spring (end)
Free length 4-31/32"
Pressure in pounds (when
compressed to 2.219") 10-1/2-12
VALVE TIMING (with ramp at .001" lift)
Intake opens 39° B.T.D.C.
Intake closes 105° A.B.D.C.
Exhaust opens 85° B.B.D.C.
Exhaust closes 59° A.T.D.C.
CONNECTING RODS
Bearing Material M-400 Alum.
Clearance between bearing and
shaft--
New limits . 0005" - .0021"
Worn limits, not over 0035"
Diameter lower end, without
bearing 2.3740" - 2.3745"
Length, center to center 6-1/2"
End play of rods on
crank pin 008" - .014"
PISTON RINGS
Clearance between rings and sides of
groove in piston--
Compression rings 0022" - .0035"
Oil rings NONE - side sealing
Gap between ends in
4.00" cylinder--
Compression rings 013" - .032"
Oil rings .015" - .061"
Number of compression rings 2
Number of oil rings 1
Width of compression rings 5/64"
Width of-oil ring 3/16"