(2) Gage at several points crosswise and endwise of head to check for out -of-round.
(3) Mark guide for replacement if out-of-round or excessively worn.
(4) Check guides for looseness, chips, cracks, or burrs. Mark for replacement if damaged.
h. Valve crosshead guides and crossheads inspection.
Measure outside diameter of valve crosshead guide.
Mark guide for replacement if diameter exceeds 0.432 in. (10.97 mm).
Check guide for straightness.
Mark guide for replacement if not at right angle with milled surface of head.
Check crossheads for cracks using magnetic particle inspection method.
Mark crosshead(s) for replacement if cracked.