Timing belt roller: common defects and their signs

1. Jamming of timing belt tensioner or idler pulley.
   • Leakage of tension roller lubricant.
   • Accelerated wear-out, damaging of the timing belt.
   • Slipping or tearing of the toothed belt.
   • Unstable operation of the engine.
2. Damaging or wear of the bearing.
   • Appearance of noise during engine operation.
   • Free play at bearing rotation.
   • Signs of oil on the timing belt.

How to replace timing belt roller?

The timing belt roller and the V-belt idler pulley have equal lifetime – 60 000 – 75 000 operational kilometers.

The broken down timing belt roller can not be restored, so the component should be replaced at appearance of the defect signs, mentioned above. Procedure of timing mechanism elements replacement requires special skills and tools, that is why such work should be entrusted to specialists of a car service station.

Usually, timing belt roller, as well as V-ribbed belt roller replacement, is performed together with tensioner levers and belts replacement.