Cylinder Head Removal; Push Rod Inspection; Cylinder Head Inspection - Yamaha EF3000iSE Service Manual

CYLINDER HEAD COVER AND CYLINDER HEAD
b a

CYLINDER HEAD REMOVAL

1. Remove:
• Cylinder head
NOTE:
• Rotate the crankshaft clockwise until the
mark a on the flywheel magneto is parallel
with the punch mark b. This is the condition
in which the piston is at top dead center of
the compression stroke.
SWL3450
• If the piston is at top dead center of the
exhaust stroke, turn the crankshaft one full
turn (360°) to set the piston at top dead cen-
ter of the compression stroke.
• Loosen the nuts in the proper sequence.
SWL3330J

PUSH ROD INSPECTION

1. Measure:
• Push rod runout
Runout limit:
Out of specification → Replace.
SVU3100J

CYLINDER HEAD INSPECTION

1. Inspect:
• Cylinder head combustion chamber
Check the combustion chamber for car-
bon deposits
Carbon deposits → Remove.
NOTE:
Be sure not to damage the contact surface of
the cylinder.
SVU3110J
2. Inspect:
• Cylinder head
Cracks or damage around the spark
plug hole → Replace.
3-26
ENG
0.5 mm (0.02 in)