Audi Workshop Service and Repair Manuals

Removing and installing balance shaft and retaining frame Special tools and workshop equipment required

t  Locking pin -T10060 A-

t  Socket -T10061- Removing –  Remove poly V-belt → Chapter. –  Remove toothed belt: toothed belt drive with hydraulically damped tensioning roller → Chapter, toothed belt drive with friction-damped tensioning roller → Chapter. –  Remove sump → Chapter. –  Remove sealing flange (pulley end) → Chapter.

–  Remove bolts -arrows-. –  Release the 5 retaining tabs and remove baffle plate.

–  Press down chain tensioner and lock with locking pin -T10060 A--arrow-. –  Unbolt idler sprocket -1- from retaining frame. –  Unscrew bolts -2- and remove chain tensioner. –  Remove chain from sprockets and lay it aside on a clean surface.

–  Block balance shaft as shown using a spanner (24/27 mm) -item 1-. l  When blocking the balance shaft, make sure that the spanner is centred on the balance weight and at right angles to the balance shaft. –  Loosen bolt -2- at balance weight using socket -T10061-.   Note Do not unscrew bolt all the way when loosening. –  Unbolt retaining frame -3- from cylinder block and remove retaining frame with balance shaft. –  Lay retaining frame aside on a clean surface. –  Unscrew bolt on balance weight and detach balance weight and chain sprocket. –  Turn balance shaft so that it can be removed from the bearings. Installing Installation is carried out in the reverse order; note the following:   Note t  Renew O-ring. t  Renew the bolts tightened with specified tightening angle. –  Lubricate contact surfaces of bearing and insert balance shaft. –  Fit chain sprocket and balance weight on balance shaft.   Note Chain sprocket and balance weight can only be fitted in one position. –  Tighten bolt for balance weight/chain sprocket hand-tight. –  Check that dowel sleeve in cylinder block and O-ring in retaining frame are in position before installing retaining frame.

–  Tighten retaining frame -3- to cylinder block hand-tight and align. l  Check that retaining frame aligns flush with outer edge of cylinder block on pulley end. –  Tighten retaining frame in stages and in diagonal sequence. –  Block balance shaft as shown using a spanner (24/27 mm) -item 1-. l  When blocking the balance shaft, make sure that the spanner is centred on the balance weight and at right angles to the balance shaft. –  Secure balance weight using new bolt -2-. –  Install chain tensioner.

–  Clean chain with a lint-free cloth. –  Ensure that mark -arrow- on crankshaft sprocket is at top.

–  Lay chain over crankshaft sprocket, oil pump sprocket and balance shaft sprocket. l  Ensure that marks on crankshaft sprocket and balance shaft sprocket align with the colour-coded chain links -arrows-.   Note The colour-coded chain links are additionally marked with a notch. –  Engage idler sprocket in chain and tighten idler sprocket to retaining frame. –  Remove locking pin from chain tensioner.

–  Check that marks on crankshaft sprocket and balance shaft sprocket align with the colour-coded chain links -arrows-. –  Install sealing flange (pulley end) → Chapter. –  Fit baffle plate with new O-ring. To do this: l  Lubricate O-ring with oil. l  Lubricate sleeve on inside of baffle plate with oil. l  Make sure sealing tape is properly applied. l  Make sure baffle plate engages properly in retaining frame. –  Install sump → Chapter. –  Install toothed belt (adjust valve timing): toothed belt drive with hydraulically damped tensioning roller → Anchor, toothed belt drive with friction-damped tensioning roller → Anchor. –  Install poly V-belt → Chapter. Tightening torques

Component	Nm
Retaining frame with balance shaft to cylinder block	14 + 180° 1)2)
Balance weight with chain sprocket to retaining frame	100 + 90° 1)3)
Chain tensioner to retaining frame	8 + 90° 1)3)
Idler sprocket to retaining frame	20
Baffle plate to retaining frame	5
l  1) Renew bolt(s). l  2) 180° = one half turn. l  3) 90° = one quarter turn.