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Renewing valve stem oil seals with cylinder head installed > < Removing and renewing camshafts or camshaft bearings - cylinder bank 2 (left-side)

A4 Mk3

Checking hydraulic valve compensation elements
Checking hydraulic valve compensation elements
  Note
t  Hydraulic compensation elements cannot be serviced.
t  Irregular valve noises when starting engine are normal.
Special tools and workshop equipment required
   
t  Adapter -T40058-
t  Plastic wedge
t  Feeler gauge
Procedure
–  Start engine and run until radiator fan has started up once.
–  Increase engine speed to approx. 2500 rpm for 2 minutes (perform road test if necessary).
–  If the compensation elements are still noisy, locate the defective compensation element as follows:
–  Remove cylinder head cover: left-side → Chapter; right-side → Chapter.
  W00-10109
–  Insert guide pin of adapter -T40058- as follows:
l  The larger-diameter section -arrow 1- faces towards the engine.
l  The smaller-diameter section -arrow 2- faces the adapter.
  A13-10026
–  Turn crankshaft with adapter -T40058- in direction of engine rotation -arrow- until cam of compensation element to be tested is at top.
  A13-10022
–  Press roller rocker finger down -arrow- with a plastic wedge to determine clearance between cam and roller rocker finger.
–  If it is possible to insert a feeler gauge of 0.20 mm between cam and roller rocker finger, renew compensation element:
t  → Chapter „Removing camshafts and re-installing used camshafts - cylinder bank 1 (right-side)“
t  → Chapter „Removing camshafts and re-installing used camshafts - cylinder bank 2 (left-side)“
Additional steps required
–  Install cylinder head cover: left-side → Chapter; right-side → Chapter.
  A15-1011

Renewing valve stem oil seals with cylinder head installed > < Removing and renewing camshafts or camshaft bearings - cylinder bank 2 (left-side)