2004 Buick Century. 3100 motor. 150k miles
Recently discovered strange noise but not sure exactly how long its been happening. (I listen to the radio pretty loud)
Engine sounds normal at start/idle (hot and cold)
During acceleration i hear a constant ticking/tapping/clattering at a decent volume from 1st to 3rd…after 3rd it quiets down a bit but still constant. It goes away completely directly after shifting into 4th.
i then cruise down the highway at 75-80 with no problem whatsoever.
(It can also be heard if i rev the engine in park.)
the day i noticed it i immediately checked the oil. It was a little over a quart low. I filled it but the sound has not changed.
I wouldnt say its a full on knock but it does sound alarming like the engine could blow at any moment from 1st to 4th. Sounds perfectly fine after that.