valve replacement on 2004 Nissan Xterra

I have a 2004 nissan xterra 3.3 v6 and the timing belt broke going down the road at approx55 mph, possibility valves are bent; how would i go about replacing the valves without buying a new motor.

1 answer
It is an interference engine that if was running and belt went out then likely has bent valves. Would need to have a machine shop replace valves and would need to remove heads for this.