Specifications
Problem:
The large idler snaps of following a short period of operation
as a result of bearing seizure. This can lead to engine damage.
Cause:
Because of insuicient tension, the back of the timing belt
has become heated up on the two stabilizing rollers and
transmitted heat to the large idler. Eventually it overheats
and snaps of.
Solution:
When adjusting timing belt tension, it is vital that the correct
position of the marking on the tensioner pulley is checked
again, even once the drive has been rotated several times. Care
must be taken to make sure there is suicient friction force at
the small stabilizing rollers so that they are also driven without
any slippage occurring.
Stabilizing roller
Large idler
Tensioning pulley
CT 1044 K1
Audi, VW, Seat, Škoda 1.9 TDI
ContiTech Technical Info 27
Snapped-of idler