Why is the timing chain noisy in 2.4 quad 4?

The guides are probably bad from the engine heat and wear.

When the tensioner has been replaced, you must take something like a small screw driver and press the little plunger, that pushes out the shoe, all the way in and then it will release the lock and apply pressure against the shoe. Most people think that the oil pressure releases it but it doesn't, the oil pressure will keep the pressure against it only after you unlock it by pressing it all the way in.