Engine Rebuilding Specifications

Cylinder Head Warpage Limit [01]
Valve Stem to Guide Clearance
Intake 0.0007-0.0025 in
Exhaust 0.0014-0.0032 in
Valve Seat Angle 45°
Valve Spring Free Length 1.7 in
Valve Spring Installed Height 1.35 in
Valve Spring Seated Pressure
Intake 33 lb @ 1.35 in
Exhaust 41 lb @ 1.35 in
Valve Spring Comp. Pressure Pounds @ Inches
Intake 82 lb @ 1.00 in
Exhaust 95 lb @ 1.03 in
Valve Spring Out Of Square Limit 2°
Valve Stem Diameter
Intake 0.2375-0.2381 in
Exhaust 0.2368-0.2374 in
Valve Face Angle 44°
Valve Clearance (At TDC with lifter collapsed)
Intake 0.039 in
Exhaust 0.039 in
Camshaft Journal Diameter 1.0228-1.0236 in
Camshaft Bearing Clearance 0.0007-0.0028 in
Camshaft Endplay 0.0031-0.0086 in
Lifter Diameter 1.1171-1.1178 in
Lifter To Bore Clearance 0.0010-0.0028 in
Crankshaft Main Bearing Journal Diameter 2.2844-2.2852 in
Connecting Rod Journal Diameter 1.8439-1.8518 in
Bearing Clearance
Main Bearings 0.0007-0.0017 in
Connecting Rod Bearings 0.0006-0.0027 in
Crankshaft Endplay 0.0035-0.0102 in
Connecting Rod Pin Bore Diameter 0.7521-0.7883 in
Connecting Rod Side Clearance 0.0035-0.0126 in
Pin To Piston Clearance 0.0004-0.0006 in
Piston End Ring Minimum Gap
Top Compression Ring 0.008-0.010 in
Second Compression Ring 0.012-0.020 in
Oil Ring 0.016-0.055 in
Piston Ring Side Clearance
Top Compression Ring 0.0016-0.0028 in
Second Compression Ring 0.0008-0.0020 in
Oil Ring Snug Fit
Cylinder Bore Taper (Max.) 0.001 in
Cylinder Bore Out of Round (Max.) 0.001 in

[01] 0.002 in for each six inches of length