Specifications
Problem:
A cast part has broken of the tensioning pulley or the spring
is broken. The tensioning pulley does not work, and the belt
has jumped.
Cause:
The tensioning pulley is visibly
contaminated by oil. The Telon-
coated friction pulley is designed
to damp vibrations but ceases
to work after coming into contact
with oil.
Solution:
The oil contamination caused the failure of the pulley (exces-
sive oscillation of the spring). Always check to ensure that the
shaft sealing rings on the crankshaft/camshaft are functioning
properly. If necessary, they must be replaced.
CT 939 K15
Audi, VW 2.4/2.5 TDI 5-cyl
ContiTech Technical Info 22
Oil-fouled tensioning pulley