Noisy engine, probably due to tension bearing adjustment?

They can be noisy, my rodeo sounds like a diesel. But, it might be something else, belt tensioners usually only tap, one time every rpm, valves might make more racket, rods sound like a snare drum under neath the car, check the oil, the sound should be coming from the front of the engine. Water pumps, alternators, ac comp, all can be noisy. Turn off the ac when listening. Watch out for the fan. A long screwdriver or a piece of wood with ear against the end will quickly find a noisy part.