Audi Workshop Service and Repair Manuals

Removing and installing balance shaft (inlet side) Removing –  Remove toothed belt for coolant pump → Chapter. –  Remove timing chain cover (top) → Chapter. –  Remove timing chain cover (bottom) → Chapter. –  Remove camshaft timing chain → Chapter. –  Remove drive chain for balance shafts → Chapter.

–  Remove idler gear -1-.

–  Remove bolt -2- securing balance shaft (inlet side) and pull out balance shaft. Installing l  Tightening torques → Chapter „Balance shafts - exploded view“

–  Lubricate balance shaft bearings -arrows- with engine oil.

–  Install balance shaft (inlet side) and tighten bolt -2-.

–  Renew O-ring -1- and lubricate with engine oil. –  Lubricate bearing mounting with engine oil and install; dowel pin -arrow- for bearing mounting must engage in bore in cylinder block.   Caution Always renew idler gear. If this is not done, there is no backlash, which causes engine damage. The new idler gear has a special lubricant coating which wears off after a short running period and thus automatically creates the specified backlash.

–  Mark faces of gear teeth of idler gear with paint marker -arrow-. –  Insert idler gear; marking on balance shaft must be positioned between markings on faces of gear teeth.

–  Tighten bolt -1- for idler gear: tightening sequence → Fig.. –  Check markings on idler gear/balance shaft -arrow-. Further assembly is basically carried out in reverse order of dismantling. Note the following: –  Install drive chain for balance shafts → Chapter. –  Install camshaft timing chain → Chapter. –  Install timing chain cover (bottom) → Chapter. –  Install timing chain cover (top) → Chapter. –  Install poly V-belt tensioner → Chapter. –  Install poly V-belt → Chapter. –  Renew oil seal for balance shaft (inlet side) → Chapter. –  Install toothed belt for coolant pump → Chapter.