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Crankshaft Bearing Play, Check (with
Plastigage)
 Remove
| 1. |
Detach cylinder block base plate with crankshaft bearing
shells
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| 2. |
Measure bearing play with Plastigage (deformable plastic
thread)
Note: "Plastigage" is
available for various tolerance ranges
| • |
Cut thread to match the width of the con-rod bearing
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| • |
Place thread axially between con-rod bearing journal and
con-rod bearing shell
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| 3. |
Attach cylinder block base plate to cylinder block
Note: To prevent thread
from breaking when removing cylinder block base plate, remove
grease from con-rod journal and lightly oil crankshaft bearing
bearing shell. Do not rotate crankshaft.
| • |
Tighten 10x bolt M8 (inner) 25 Nm +
60°
Note: The old bolts can
be used for the measuring process
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| • |
Tighten 12x bolt outer (M6) 10 Nm +
60°
Note: The old bolts can
be used for the measuring process
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| 4. |
Detach cylinder block base plate
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| 5. |
Measure crankshaft bearing play
| • |
Measure width of the flattened Plastigage thread with the
measuring scale (arrow)
Note: Do not mix up
millimetre and inch data on the measuring scale
| – |
Permissible crankshaft bearing play: 0.007 to 0.031 mm
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| 6. |
Clean con-rod bearing, crankshaft bearing and crankshaft
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Install
| 7. |
Apply silicone sealing compound
Note: The base plate
cylinder block must be fitted within 10 minutes of applying the
silicone sealing compound
Important: Do not lay bead of
silicone sealing compound in the groove or on the inner edge
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| • |
Apply a bead of silicone sealing compound on the outside edge
of the groove (1) of the cylinder block base plate
| – |
approx 2 mm (dimension I) thick
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| 8. |
Attach cylinder block base plate
| • |
Attach cylinder block base plate hand-tight to cylinder
block
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| • |
Tighten 10x bolt M8 (inner) 25 Nm +
60°
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| • |
Tighten 12x bolt outer (M6) 10 Nm +
60°
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