CYLINDER HEAD
5-16
EAS24120
REMOVING THE CYLINDER HEAD
1. Remove:
• Cylinder head bolts
• Cylinder head nuts
NOTE:
• Loosen the nuts, cap nuts, and bolts in de-
creasing numerical order (refer to the numbers
in the illustration).
• Loosen each nut 1/2 of a turn at a time. After all
of the nuts are fully loosened, remove them.
EAS24160
CHECKING THE CYLINDER HEAD
1. Eliminate:
• Combustion chamber carbon deposits
(with a rounded scraper)
NOTE:
Do not use a sharp instrument to avoid damag-
ing or scratching:
• Spark plug bore threads
• Valve seats
2. Check:
• Cylinder head
Damage/scratches → Replace.
• Cylinder head water jacket
Mineral deposits/rust → Eliminate.
3. Measure:
• Cylinder head warpage
Out of specification → Resurface the cylinder
head.
▼▼▼▼ ▼ ▼▼▼▼▼▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼▼▼
a. Place a straightedge “1” and a thickness
gauge “2” across the cylinder head.
b. Measure the warpage.
c. If the limit is exceeded, resurface the cylinder
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.
NOTE:
To ensure an even surface, rotate the cylinder
head several times.
▲▲▲▲ ▲ ▲▲▲▲▲▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲▲▲
EAS24240
INSTALLING THE CYLINDER HEAD
1. Install:
• Cylinder head
NOTE:
Pass the timing chain through the timing chain
cavity.
2. Tighten:
• Cylinder head nuts “1”–“7”, “10”
• Cylinder head cap nuts “8”, “9”
8
62410
9
315
7
12
11
Warpage limit
0.05 mm (0.0020 in)
T
R
.
.
Cylinder head nut (1st)
25 Nm (2.5 m·kg, 18 ft·lb)
Cylinder head nut (final)
42 Nm (4.2 m·kg, 30 ft·lb)
To Next Page
Loading...
Need help?
General
