308881-10
18 ENGINE
-
Measure axial play
f)
between the connecting rod and the
crankwebs using the special tool.
I
Feeler gauge (59029041100) (
I!!:!
p. 357)
Connecting rod - end play
of lower conrod bearing
0.20 ... 0.45 mm (0.0079 ...
0.0177 in)
If the measured value is less than the specification:
-
Correct it so the dimension is equal to the specified
value.
Finishing work
-
Check the crankshaft run-out at bearing pin. (
�
p. 207)
18.4.13 Checking crankshaft run-out at bearing pin
18.4.14 Cylinder - Nikasil
®
coating
304609-10
-
Position the crankshaft on a roller block.
- Turn the crankshaft slowly.
-
Check the crankshaft run-out on both bearing pins.
Crankshaft - run-out on
bearing pin
s; 0.16 mm (:5 0.0063 in)
If the crankshaft run-out at the bearing pin is larger than
the specification:
- Align the crankshaft.
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 conductivity, resulting in much improved performance,
low wear, and a lightweight cylinder.
18.4.15 Checking/measuring the cylinder
-
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
0-
and
0-axes
using a micrometer to identify oval
wear.
Guideline
Cylinder - drill hole diameter
Size I
95.000 ... 95.012 mm
(3.74015 ... 3.74062 in)
Size II
95.013 ... 95.025 mm
(3.74066 ... 3.74113 in)
207