What abnormal noise does a faulty NK250 tensioner make?

[TylerLynn]

A faulty tensioner produces a buzzing or squeaking abnormal noise. Symptoms of a damaged tensioner include increased fuel consumption, lack of power, engine knocking, and other malfunctions. The tensioner's function is to guide and maintain proper tension on the engine's timing belt or timing chain, ensuring it remains in the optimal tension state. Relevant information about the tensioner is as follows: 1. Classification of tensioners: Tensioners are generally divided into hydraulic and mechanical types, both of which can automatically adjust the tension of the timing belt and timing chain. 2. The method for removing the tensioner is: Drive the vehicle onto a lift, disconnect the battery, remove the water pipe joint bracket, insert the tool into the special opening of the belt tensioner, then use a wrench to turn the automatic belt tensioner clockwise and loosen the engine auxiliary system belt. Finally, loosen the fixing screws according to the belt tensioner wheel to be removed.