Oil problem?

Question

i got a car from a buddy of mine and there seems to be a chattering noise comming from the engine..it's not a knocking so im not thinking is a rod..i also tightened the rocker arms and it's still occuring.it's not as loud when the engine is cold but gets louder as the engine tempature increases and the oil light comes on when the engine gets warm aswell but goes off when i accelerate then comes back on as i let off the accelerator

could anyone give me and idea of what this might be?

could the problems be related?

i was thinking it was the oil pump so i had that changed and still the problem exists.any help is appreciated

the car is a 1997 chevy cavalier 4 cylinder 2.2 litre

Answer 1

sounds like berings are shot