[Jeff_5_7]

ok so i was driving my supra to pick up my little brother and he was trying ot tell me sothimg from across the yard and i cvouldny hear him os i turned off my car then i started it back up and it started knocking funny so i dorve home and checked the oil which i changed 200 miles ago its good and good oil pressure on the gauges the sound seems to be coming from the exhaust camshaft right below where the intake goes over it does any body no what this could be and hoe ot make it stop the car still runs good it just knocks funny