user manual

4-16
ENG
CYLINDER HEAD
NOTE:
NOTE:
EAS00223
REMOVING THE CYLINDER HEAD
1. Remove:
 cylinder head nuts
1

16
 Loosen the nuts in the proper sequence as
shown.
 Loosen each nut 1/2 of a turn at a time. After all
of the nuts are fully loosened, remove them.
EAS00228
CHECKING THE CYLINDER HEAD
The following procedure applies to all of the cyl-
inder heads.
1. Eliminate:
 combustion chamber carbon deposits
(with a rounded scraper)
Do not use a sharp instrument to avoid damag-
ing or scratching:
 spark plug threads
 valve seats
2. Check:
 cylinder head
Damage/scratches  Replace.
3. Measure:
 cylinder head warpage
Out of specification  Resurface the cylin-
der head.
Cylinder head warpage
Less than 0.1 mm
a. Place a straightedge
1
and a thickness
gauge
2
across the cylinder head.
b. Measure the warpage.
c. If the limited is exceeded, resurface the cylin-
der head as follows.
d. Place a 400  600 grit wet sandpaper on the
surface plate and resurface the cylinder
head using a figure-eight sanding pattern.