Crankshaft

3.1 Assembly overview - crankshaft

• 1 Bearing shells 1, 2 and 4
  • For bearing cap without oil groove.
  • for cylinder block with oil groove
  • Do not interchange used bearing shells (mark).
• 2 Bolts
  • Renew
  • 65 Nm +90°
• 3 Bearing cap
  • Bearing cap 1: belt pulley end.
• 4 Crankshaft
  • Measuring axial clearance ⇒ 3.1 Assembly overview - crankshaft.
  • Measuring radial clearance ⇒ 3.3 Measuring axial clearance of crankshaft
  • Crankshaft dimensions ⇒ 3.1 Assembly overview - crankshaft.
• 5 Bearing shell 3
  • For bearing cap without oil groove.
  • for cylinder block with oil groove
• 6 Thrust washers
  • For bearing 3

Installation position of thrust washers for bearing 3

3.2 Crankshaft dimensions

3.3 Measuring axial clearance of crankshaft

Special tools and workshop equipment required

• Universal dial gauge holder - VW 387-

• Dial gauge - VAS 6079-

Procedure

• Screw dial gauge - VAS 6079- with universal dial gauge bracket - VW 387- to cylinder block as shown in the illustration.
• Position dial gauge against crank web.
• Press crankshaft against dial gauge by hand and set gauge to “0”.
• Push crankshaft away from dial gauge and read off measured value.

Axial clearance:

• New: 0.07 to 0.17 mm
• Wear limit: 0.37 mm

3.4 Measuring radial clearance of crankshaft

Special tools and workshop equipment required

• Plastigage

»Carry out the following work sequence«

• Remove bearing cap.
• Remove bearing cap and clean bearing journal.
• Place Plastigage corresponding to the width of the bearing on the journal or into the bearing shells.

• The Plastigage must lie in the middle of the bearing shell.

• Fit bearing cap and tighten bolts to 65 Nm without turning further angle and without rotating crankshaft.
• Remove bearing cap again.
• Compare width of Plastigage with the measurement scale.

Radial clearance:

• New: 0.03 to 0.08 mm
• Wear limit: 0.17 mm.