Timing Chain Tensioner - 11317584723

Lower chain tensioner

This timing chain tensioner is mounted in the timing cover and can be removed without dis-assembly. This tensioner is likely the culprit if you have noisy timing chains.

Timing chains are like timing belts in that they keep the major components of the engine's combustion cycle in sync. Timing belt tensioners and timing chain tensioners perform the same job of keeping the chain/belt at the right tension. If the timing chain tensioner fails there is a high risk of chain failure, this it should be replaced immediately.