loud knocking

[Ahmad88]

haha, i had the same problem 2 times in a row it is a piston, check your oil see if you have enough to lube the pistons, take apart the engine and see if anything is damaged, if somethin is then replace it asap, just yesterday i started hearing the same sound when i got home, i checked my oil, theres was barely any in there, so i changed the oil and filter, when i first start it up i would hear it but then it goes away, you could have the same problem.im scared that i damage something or loosend a piston. I have one hell of a history with my supra, first time i got it a piston was loose and shot it through the block, second engine overheated and cracked the head, 3rd engine not enough oil, i hope nothing else happens. sorry for goin off topic but good luck with your car man.