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30/ENGINE - WORK ON INDIVIDUAL PARTS
Checking the crankshaft run-out on the bearing pin
®
Cylinder - Nikasil
coating
Checking/measuring the cylinder
Measure the external dimensions of the crankshaft - crank web.
Crankshaft - external crank web dimen-
sion
»
If the specified value is not reached:
Correct to the specified value.
Check the crankshaft run-out on the bearing pin. (
200211-10
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
»
If the crankshaft run-out on the bearing pin is greater than the specified value:
Align the crankshaft.
200207-10
®
Nikasil
is a surface protection layer for a coating procedure developed by the Mahle
company. 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
resulting in much improved performance, low wear, and a lightweight cylinder.
200158-10
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 on the
crometer to check for oval wear.
Specification
Cylinder - bore diameter
Size I
Size II
400374-10
Cylinder size
200162-10
63 0.05 mm (2.48 0.002 in)
®
coating are very good heat conductivity,
95... 95.012 mm (3.74... 3.74 in)
95.013... 95.025 mm (3.74...
3.74 in)
is marked on the side of the cylinder.
P. 80)
0.16 mm ( 0.01 in)
and
axes using a mi-
80
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