Buick LeSabre 1965 Service Manual page 29

ENGINE SPECIFICATIONS 2 - 7
b. 300 Cubic Inch Engines (Cont'd.)
Item 300 Cu. In.
Connecting Rod Specifications
Bearing Length .737
Bearing Clearance (Limits) 0020 - .0023
End Play - Total for both Rods .006 - .014
Crankshaft Specifications
End Play at Thrust Bearing 004 - .008
Main Bearing Journal Diameter 2.4995
Crankpin Journal Diameter 2.0000
Main Bearing Overall Length
#1 864
#2 864
#3 1.057
#4 864
#5 864
Main Bearing to Journal Clearance 0004 - .0018
Camshaft Specifications
Bearing Journal Diameter
#1 1.785 - 1.786
#2 1.755 - 1.756
#3 1.725 - 1.726
#4 1.695 - 1.696
#5 1.665 - 1.666
Journal Clearance in Bearings 0005 - .0025 (#1), .0005 - .0035 (#2, #3, #4,& #5)
Valve System Specifications
Rocker Arm Ratio 1.6 to 1
Rocker Arm Clearance On Shaft 0017 - .0032
Valve Lifter Diameter 8422 - .8427
Valve Lifter Clearance In Crankcase 0015 - .003
Valve Lifter Leakdown Rate 12 to 60 Sec. in Test Fixture
Intake Valve
Head Diameter 1.625
Seat Angle 45°
Stem Diameter 3412 Top - .3407 Bottom
Clearance In Guide Top .001 - .003
Bottom .0015 - .0035
Exhaust Valve
Head Diameter 1.3125
Seat Angle 45°
Stem Diameter 3407 Top - .3402 Bottom
Clearance In Guide Top .0015 - .0035
Bottom .002 - .004
Valve Spring
Valve Closed - Pounds @ Length 64 @ 1.640
Valve Open - Pounds @ Length 168 @ 1.260