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16
ENGINE
16.4.12 Checking/measuring the cylinder
16.4.13 Checking/measuring the piston
A
0 0 A
A
0 0 A
A
0 0 A
–
Check the O-ring of the chain adjuster for damage and wear.
»
If there is damage or wear:
–
Replace the O-ring.
–
Check the cylinder bearing surface for damage.
»
If the cylinder bearing surface is damaged:
–
Change the cylinder and piston.
–
Measure the cylinder diameter at several places in the
micrometer to check for oval wear.
300102-10
–
To determine the size, measure the cylinder at a distance
the cylinder.
Guideline
Distance
Cylinder - bore diameter
Size I
Size II
–
The cylinder size
300103-10
–
Check the sealing area of the cylinder head for distortion using a straight edge and
the special tool.
Feeler gauge (59029041100) (
Cylinder/cylinder head - sealing area
distortion
»
If the measured value does not equal the specified value:
–
Change the cylinder.
400376-10
–
Use the special tool to measure clearance
groove.
Guideline
Piston ring - groove clearance
Feeler gauge (59029041100) (
»
If clearance
–
Change the piston and piston rings.
–
Check/measure the cylinder. (
400484-10
–
Check the piston bearing surface for damage.
»
If the piston bearing surface is damaged:
–
Change the piston and, if necessary, the cylinder.
–
Check that the piston rings can move easily in the piston ring grooves.
»
If the piston ring is stiff:
–
Clean the piston ring groove.
300099-10
B
is marked on the side of the cylinder.
1
p. 212)
p. 212)
is larger than the specified value:
A
Tip
Use an old piston ring to clean the piston ring groove.
and
axes using a
X
Y
from the top edge of
B
55 mm (2.17 in)
102.000... 102.012 mm (4.01574...
4.01621 in)
102.013... 102.025 mm (4.01625...
4.01672 in)
≤ 0.10 mm (≤ 0.0039 in)
of the piston rings in the piston ring
A
≤ 0.08 mm (≤ 0.0031 in)
p. 125)
125
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