audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Engine cylinder head, valve gear > < Piston and cylinder dimensions
Measuring radial clearance of conrods
Measuring radial clearance of conrods
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  Bearing shells worn down to the base layer must be renewed.
–  Remove conrod bearing cap. Clean bearing cap and bearing journal.
–  Place a length of Plastigage corresponding to the width of the bearing on the bearing journal or in the bearing shell.
–  Fit conrod bearing caps and tighten to 30 Nm without rotating crankshaft.
–  Remove conrod bearing cap again.
–  Compare width of Plastigage with measurement scale.
Radial clearance:
l  New: 0.015 ... 0.062 mm.
l  Wear limit: 0.12 mm.
–  Renew conrod bolts.
   

Engine cylinder head, valve gear > < Piston and cylinder dimensions