Section 02 ENGINE
Subsection 10 (CYLINDER HEAD)
1
R1503motr98A
1. Cylinder head screws M6
Remove the cylinder head screws M11 securing
cylinder head to cylinder block.
1
R1503motr99A
1. Cylind
er head screws M11
Pull up cylinder head.
Remove
gasket.
Cylinder Head Cleaning
Remove
carbon deposits from combustion cham-
ber, ex
haust port and piston top.
Clean cylinder head, especially cylinder head
screw surface from oil spillage.
Blow out the oil orifices and check if they are not
clogged.
smr2009-025-010_a
1. Oil orifices
Cylinder Head Inspection
Check for cracks between valve seats or other
damages, if so, replace cylinder head.
Check cylinder head mating surface for flatness,
using a straight edge.
smr2006
-016-063_a
1. Cylinder head
2. Flat bar
3. Feeler
gauge
Check cylinder head warpage.
CYLINDER HEAD WARPAGE
Maximum 0.15 mm (.006 in)
If warpage exceeds specification, resurface the
cylinder head as follows.
Use a 400 - 600 grit wet sandpaper on a surface
plate and gently grind off the mating surface.
NOTE: To ensure an even surface, rotate cylinder
head several times during resurfacing.
Replace cylinder head, if resurfacing fails.
Cylinder Head Installation
For installation, reverse the removal procedure.
Pay attention to the following details.
Ensure dowel pins are in place.
Install NEW cylinder head gasket.
140 smr2009-025
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