CYLINDER HEAD
5-15
EAS15B420a
REMOVING THE CYLINDER HEAD
1. Remove:
● Cylinder head bolts
● Cylinder head nuts
NOTE:
● Loosen the nuts and bolts in the proper se-
quence as shown.
● 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.
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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.
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EAS15B422a
INSTALLING THE CYLINDER HEAD
1. Install:
● Dowel pins
● Cylinder head gasket
2. Install:
● Cylinder head
NOTE:
Pass the timing chain through the timing chain
cavity.
3. Tighten:
● Cylinder head nuts “1”
Warpage limit
0.03 mm (0.0012 in)
Cylinder head nut
35 Nm (3.5 m•kg, 25 ft•lb)
New
T
R
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