audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Pistons and conrods > < Measuring axial clearance
Measuring radial clearance
Measuring radial clearance
Special tools and workshop equipment required
t  Plastigage
Procedure
  Note
t  Mark used bearing shells for re-installation (but do not mark bearing surface).
t  If bearing shells are worn down to nickel layer they must be renewed.
–  Remove bearing cap and clean bearing journal.
–  Place a length of Plastigage corresponding to the width of the bearing on the bearing journal or in the bearing shell.
l  The Plastigage must be positioned in the centre of the bearing shell.
–  Fit bearing cap and tighten to 65 Nm. Do not rotate crankshaft.
–  Remove bearing cap again.
–  Compare width of Plastigage with measurement scale.
Radial clearance:
l  New: 0.03 ... 0.08 mm.
l  Wear limit: 0.17 mm.
   

Pistons and conrods > < Measuring axial clearance