S5 Quattro Coupe V8-4.2L (CAUA) (2009)
Crankshaft: Testing and Inspection
Radial Clearance, Measuring
Radial Clearance, Measuring
Special tools, testers and auxiliary items required
‹› Plastigage
Procedure
‹› Marked the used bearing for installation later, but not on the running surface.
‹› If the bearing shells are worn down to the nickel layer, they must be replaced.
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Remove the guide frame and clean the bearing journals.
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Place the Plastigage over the entire width of the bearing journal or into the bearing shells.
‹› Plastigage must rest in center of bearing shell.
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Install guide frame and tighten to 30 Nm. Do not turn crankshaft.
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Install the guide frame.
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Compare width of Plastigage with calibrated scale.
Radial clearance:
‹› New: 0.017 to 0.044 mm.
‹› Wear limit: 0.08 mm.