Cylinder Head Specifications

CYLINDER HEAD SPECIFICATIONS

Application

In. (mm)

Maximum Warpage

⁽¹⁾

Valve Seats

Seat Angle

45°

Seat Width

.069-.091 (1.75-2.31)

Maximum Seat Runout

.003 (.08)

Valve Guides

Intake Valve

Valve Guide Cylinder Head Bore I.D

.5310-.5324 (13.487-13.523)

Valve Guide I.D.

.3174-.3187 (8.062-8.095)

Valve Stem-To-Guide Oil Clearance

.0008-.0027 (.020-.069)

Exhaust Valve

Valve Guide Cylinder Head Bore I.D.

.5310-.5324 (13.487-13.523)

Valve Guide I.D.

.3174-.3187 (8.062-8.095)

Valve Stem-To-Guide Oil Clearance

.0018-.0037 (.046-.095)

⁽¹⁾	Warpage is .003" (.08 mm) per 6" (152.4 mm) area or .006" (.15 mm) overall. DO NOT machine more than .010" (.25 mm) from cylinder head original thickness.