Operating instructions

6-9
SUBASSEMBLY
AND PART
INSPECT NATURE OF INSPECTION
SPECIAL
CONSIDERATIONS
Valve Seats Roughness caused by honing. If seats cannot be made
serviceable by grinding
within width limit, replace
seat.
Cooling Fins Cracks and broken areas. Cracked and/or broken
cylinder head fins may be
re- paired, providing a total
of not more than five square
inches is, or has been
removed.
Base Flange If attaching nuts were found
loose at disassembly, test for
flatness of mounting face.
Allow not over 0.001 inch
out-of-flat on machined
surface.
Pilot Out-of-roundness of pilot
below face flange.
Spark Plug
Thread Insert
Distortion or improper fit in
cylinder head hole.
Pushrod Housing
Stems
Looseness, leakage.
Stems Scoring, nicks in grooves,
wear on tips.
Polishing must not reduce
diameter below minimum
for new parts.
Heads Use dial indicator to deter-
mine warp. Make sure that
grinding has not cut through
Stellite face of exhaust valve
or entered rounded edge on
intake valve head.
Length Use height gauge to detect
stretch and check for reduc-
tion due to tip grinding.
Stretched valves may fail.
Shortened valve may
exceed ability of hydraulic
lifters to take up lash.
Contact Foot Scoring, diameter.
Oil Passages Obstruction.
Hub Side clearance between
cylinder head supports.
Refer to Table of limits
Outside Surface Diameter, scoring, rough
ends.