The interior mechanism of the timing belt tensioner comprises a spring and a friction
element. The friction element serves to absorb small vibrations and fluctuations in engine
speed. The spring ensures the correct timing belt tension, regardless of wear and
temperature.
The tension of the timing belt should be set when the engine is cold.
NOTE: If the engine temperature is higher or lower, remember that a different position is
specified for the timing belt tensioner (see illustration).
The timing belt should be fitted starting from the crankshaft over the idler pulley, the intake
and exhaust camshaft pulleys, the coolant pump and finally on the timing belt tensioner.
Once the timing belt has been correctly tensioned, the engine must be rotated by hand two
turns clockwise at the crankshaft in order to allow a subsequent check of the timing belt
tension and adjustment.
No direction of movement is specified when using a new timing belt. If, however, the old
timing belt is reused, the direction of movement must be marked prior to removal.