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Serial Numbers
4 5 2 6 9 5 H 1 0 0 0 0 1

Car serial numbers are located on the left front body hinge pillar....

First Digit Division code, 4 = Buick
Second and Third Digits Series
Fourth and Fifth Digits Body Style
Sixth Digit Year, 5 = 1965
Seventh Digit Assembly plant
Last Six Series production number

Engine Identification

V6 - 225,
V - 8 300, 340
Code is stamped on right side of crankcase between middle branches of right exhaust manifold
V8 - 215, 400, 401, 425 Code is stamped upside down on front af cylinder block when viewed from front of engine

Engine Tune-up

MODEL
SPARK PLUGS
DISTRIBUTOR
IGN.
TIMING
comp.,
crank
VALVES
FUEL
PUMP
PRESS.
IDLE
SPEED
Type Gap Dwell Gap
Tappet
Clearance, hot
intake
opens,
(deg)
intake exhaust
V8-300 cu. 2bbl. 44FFS .032 30° .016 2 1/2BTD 160 zero zero 26B 6 550
V8-300, 401 cu. 4bbl. 44S .032 30° .016 2 1/2BTD 170 zero zero 28B 6 500
V8-425 cu. 4bbl. 44S .032 30° .016 2 1/2BTD 170 zero zero 31B 6 525
V8-425 cu. 2-4bbl. M.T. 44S .032 30° .016 2 1/2BTD 170 zero zero 28B 6 525
V8-425 cu. 2-4bbl. A.T. 44S .032 30° .016 12BTD 170 zero zero 28B 6 525
Special and Gran Sport
V6-225 cu. 44S .035 30° .016 5BTD 160 zero zero 24B 4 1/2-5 3/4 550
V8-300 cu. 44FFS .035 30° .016 2 1/2BTD 160 zero zero 26B 4 1/4-5 3/4 550
V8-400 cu. 44S .035 30° .016 2 1/2BTD 160 zero zero 28B 4 3/4-6 1/2 500

Engine Specifications

DISPLACEMENT
CUBIC INCHES
CARBURETOR
HP @ RPM
TORQUE
A.M.A.
HP
BORE &
STROKE
COMP.
VALVE
LIFTER TYPE
OIL
PRESSURE
V8 - 300
2 - bbl.
210 @ 4600
310 @ 2400
45
3.750 x 3.400
9.0 - 1
hyd.
33
V8 - 300
4 - bbl.
250 @ 4800
335 @ 3000
45
3.750 x 3.400
11.0 - 1
hyd.
33
V8 - 401
4 - bbl.
325 @ 4400
445 @ 2800
56.1
4.1875 x 3.64
10.25 - 1
hyd.
40
V8 - 425
4 - bbl.
340 @ 4400
465 @ 2800
59.5
4.3125 x 3.64
10.25 - 1
hyd.
40
V8 - 425
2-4 - bbl.
360 @ 4400
465 @ 2800
59.5
4.3125 x 3.64
10.25 - 1
hyd.
40
Special and Gran Sport
V6 - 225
1 - bbl.
155 @ 4600
225 @ 2400
33.8
3.750 x 3.400
9.0 - 1
hyd.
33
V8 - 300
2 - bbl.
210 @ 4600
310 @ 2400
45
3.750 x 3.400
9.0 - 1
hyd.
33
V8 - 300
4 - bbl.
250 @ 4800
335 @ 3000
45
3.750 x 3.400
11.0 - 1
hyd.
33
V8 - 400
4 - bbl.
325 @ 4400
445 @ 2800
56.1
4.1875 x 3.64
10.25 - 1
hyd.
40

Engine Torque Specifications

MODEL
CYLINDER
HEAD
ROD
BEARINGS
MAIN
BEARINGS
CRANKSHAFT
BALANCER
FLYWHEEL
INTAKE
MANIFOLD
EXHAUST MANIFOLD
V6
65 - 70
30 - 35
100 - 125
140 - 160
50 - 60
25 - 30
10 - 15
V8
65 - 70
30 - 35
50 - 55
REAR 65 - 70
140 - 160
50 - 60
25 - 30
10 - 15
V6 Head torque pattern
V8 Head torque pattern

Front Wheel Bearing Adjustment





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