Good day mga sir! Ask ko lang po about sa timing chain tensioner.

My friend has a 94Sentra LEC, one day may narinig syang ingay from the engine bay, when he brought it to a auto repair shop to have it check, sabi need to change na daw yung timing chain tensioner.

Question po mga sir, panu po malalaman kung kelangan na palitan yung tensioner? How much po ba cost nun? and Where po maganda magpagawa ang mura? my friend is from marikina city.

Hoping for your response. Thanks po.