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18 ENGINE
176
Mount the dial gauge support on the engine case and measure and note the axial
play of the balancer shaft.
Guideline
f
III
Balancer shaft axial clearance
0.05... 0.20 mm (0.002... 0.0079 in)
%
If the measured value does not meet specifications:
-
Remove the balancer shaft.
-
Calculate the thickness of the compensating disks.
-
Add compensating disks to the ignition side only.
>11
w
a
**
311845-10
Info
If the axial play is too small, remove compensating disks.
If the axial play is too large, add compensating disks.
I
18-4,11 Cylinder - Nikasil® coating
Nikasil® is a surface protection layer for a coating procedure developed by Mahle.
The name is derived from the two materials used in this procedure - a layer of nickel
into which is embedded the particularly hard silicone carbide.
The most important advantages of the Nikasil® coating are very good heat conduc
tivity, resulting in much improved performance, low wear, and a lightweight cylinder.
311846-10
18.4.12 Checking/measuring the cylinder
Check the O-ring of the chain adjuster for damage and wear.
» If there is damage or wear:
-
Change 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 locations on the
o
and
o
axes using
a micrometer to identify oval wear.
Guideline
&
©
305591-10
Cylinder - bore diameter
Size I
105.000...
105.012
mm
(4.13385...
4.13432 in)
Size II
105.013...
105.025
mm
(4.13436...
4.13483 in)
The cylinder size O >
s
nnarked on the side of the cylinder.
A
%
%
O
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