Engine Rebuilding Specifications

Cylinder Head Warpage Limit [01]
Valve Stem to Guide Clearance
Intake 0.0007-0.0270 in
Exhaust 0.0017-0.0370 in
Valve Seat Angle 44.75°
Valve Seat Width
Intake 0.0430-0.0550 in
Exhaust 0.0550-0.0660 in
Valve Seat Run-Out 0.001 in
Valve Spring Free Length 1.84 in
Valve Spring Installed Height 1.57 in
Valve Spring Seated Pressure (lb @ in) 51 @ 1.57
Valve Spring Comp. Pressure (lb @ in) 153 @ 1.18
Valve Spring Out Of Square Limit 1%
Valve Stem Diameter
Intake 0.2350-0.2358 in
Exhaust 0.2343-0.2350 in
Valve Face Angle 45.5°
Valve Clearance (At TDC with lifter collapsed)
Intake 0.019-0.043 in
Exhaust 0.019-0.043 in
Camshaft Journal Diameter 1.0600-1.0610 in
Camshaft Bearing Inside Diameter 1.0620-1.0630 in
Camshaft Bearing Clearance 0.0010-0.0029 in
Camshaft Endplay 0.0010-0.0064 in
Lifter Diameter 0.6290-0.6294 in
Lifter To Bore Clearance 0.0007-0.0027 in
Crankshaft Main Bearing Journal Diameter 2.467-2.279 in
Connecting Rod Journal Diameter 1.967-1.968 in
Main Bearing Clearance 0.0009-0.0017 in
Connecting Rod Bearing Clearance 0.0010-0.0025 in
Crankshaft Endplay 0.004-0.009 in
Connecting Rod Pin Bore Diameter 0.827-0.828 in
Connecting Rod Side Clearance 0.0039-0.0118 in
Piston Clearance 0.0005-0.0009 in
Piston Pin Diameter 0.8278-0.8279 in
Pin To Piston Clearance 0.0001-0.0005 in
Piston End Ring Minimum Gap
Top Ring 0.0039-0.0098 in
Second Ring 0.106-0.165 in
Oil Ring 0.0059-0.0255 in
Piston Ring Side Clearance
Top Ring 0.0015-0.0029 in
Second Ring 0.0015-0.0033 in
Oil Ring Snug Fit
Cylinder Bore Maximum Taper 0.0002 in
Cylinder Bore Maximum Out of Round 0.0007 in

[01] 0.002 in for each six inches of length