Radial Clearance, Measuring

Radial Clearance, Measuring

Special tools, testers and auxiliary items required

• Plastigage

Procedure

• Mark used bearing shells for reinstallation but not on the running surface.

• Replace bearing shells worn down to the base layer.

- Remove guide frame and clean journals.

- Place Plastigage over entire width of bearing journal or into bearing shells.

• Plastigage must rest in center of bearing shell.

- Install guide frame and tighten to 30 Nm. Do not turn crankshaft.

- Remove guide frame again.

- Compare width of Plastigage with measuring scale:

• Radial clearance, new: 0.015 to 0.055 mm.

• Radial clearance wear limit: 0.08 mm.