kani

I own a 2010 Pajero and recently replaced the timing belt and gasket. However, just a week after the repair, the car developed severe vibrations. Additionally, when I start the engine, I hear a loud noise that sounds like it might be coming from the crank. Another issue is that the oil pressure warning light shows up on the dashboard, but only when I slow down or stop the car. When driving at higher speeds, the warning light disappears. Does anyone have any idea what might be causing these problems? I'd really appreciate some help.