selling a car problem?

[TunedIS300]

ok, i just sold my ls/vtec turbo integra about 3 weeks ago.i just got a call from the guy that bought the car and he was pissed that he blew the motor...i told him it was not my problem i told him what i was told from the previous owner and i drove the car for 3 months with no problems at all. but now he calls and say so i lost all my money and it like that huh? i have to walk again and all this bullSh*t. my question is can he find out where i live and such he was a very gangsta dudeeeee from north philly and do i have to do something bout his blown motor? im only a tad worried for my family sake last thing i want his trouble that will involve my family.