If you're experiencing issues related to the timing chain (noise, poor performance, etc.), the problem likely isn't a tensioner that needs resetting, but rather:
* Low oil pressure: This is the most common cause of timing chain noise. Check your oil level and pressure. Low oil will prevent the hydraulic tensioner from functioning correctly.
* Worn or failing tensioner: The tensioner itself might be failing internally. It's not resettable; it needs replacement.
* Worn timing chain: The chain may be stretched or worn, requiring replacement. This is a major job.
* Worn or damaged guides: The guides keep the chain properly aligned. Wear can lead to chain slap.
* Other internal engine problems: A more serious engine problem could be manifesting as timing chain noise.
Instead of trying to "reset" a non-resettable component, focus on diagnosing the root cause of the problem. If you're hearing unusual noises from the timing chain area, have a qualified mechanic inspect the engine. Ignoring the issue could lead to catastrophic engine failure. Simply replacing the tensioner without addressing the underlying cause is likely to result in the same problem recurring.
