Timing Belt Tensioner: Testing and Inspection

Semi-automatic toothed belt tensioning roller, checking

Engine codes AEG, AVH, AZG, BEV

Special tools and equipment





^ T10020 Two hole pin wrench

Engine code BBW





^ T10004 Two hole pin wrench





^ Angled retainer (arrow) must locate in cut-out on cylinder head.

Requirements
^ Engine must only be hand touch warm.

Work sequence
- Position engine at TDC for cylinder No. 1.

Engine codes AEG, AVH, AZG, BEV





- With forceful thumb pressure, depress toothed belt. Indicator -2- must move.

Engine code BBW





- With forceful thumb pressure, depress toothed belt. Indicator -2- must move.

Continued for all engines
- Release thumb pressure on toothed belt and turn crankshaft two turns in engine direction of rotation until engine is again at TDC No.1 cylinder. It is essential that last 45° (1/8 turn) is performed without stopping.
Tensioning roller must return to its original position. (Notch -1- and indicator -2- are again aligned).

Note: Use a mirror when checking.