Half Automatic Toothed Belt TENSIONING Roller, Checking

Special tools and workshop equipment required 

• Toothed Belt Tensioner T10020

Test Prerequisites

Fig 1: Locating Angled Retainer & Cut-Out On Cylinder Head

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

• The bracket -arrow- must engage into the cut-out in the cylinder head.
• The engine must be no more than warm to touch.

Perform the Following 

-- Turn the engine to upper TDC cylinder 1.

-- Place a load on the toothed belt with strong thumb pressure.

• The arrow -2- must move.
  Fig 2: Releasing Tension On Toothed Belt Until Notch And Indicator Align (Engine Codes AEG, AVH, AZG, BEV)

  Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Release load on toothed belt again.

-- Turn crankshaft over twice in engine running direction until the crankshaft is at upper Top Dead Center (TDC) cylinder one again.

• For this it is necessary that the last 45° (¹ /₈ rotation) is turned without interruption.
• The tensioning roller must return to its initial position. The notch -1- and the pointer -2- must align again.