1.2 TDI CR engine (EA189) · Cylinder head, valve gear · Valve gear

Checking hydraulic compensation elements

Special tools and workshop equipment required

  • Plastic wedge
  • Feeler gauge

Procedure

  • Start engine and run until the radiator fan has switched on once.
  • Increase engine speed to about 2500 rpm for 2 minutes; perform road test if necessary.
  • If the hydraulic compensation elements are still noisy, find out which is the defective compensation element as follows:
  • Remove cylinder head cover ⇒ 1.1 Assembly overview - cylinder head cover.
  • Turn crankshaft by the bolt for the toothed belt wheel until cam of supporting element to be tested is facing upwards.
  • Press roller rocker finger downwards -arrow- with a plastic wedge to check clearance between cam and roller rocker finger.
  • If a 0.20 mm feeler gauge can be inserted between cam and roller rocker finger, replace hydraulic compensation element ⇒ 3.5 Removing and installing camshafts.

Concluding measures