How do I start a nissan Xtra 3.3 liter engine that we replaced the timing belt?

this nissan has a 3.3 liter engine we replaced the nissan xtra timing belt we have fire, fuel,and correct timing set but the engine still wont start what do I need to do to make the engine startHow do I start a nissan Xtra 3.3 liter engine that we replaced the timing belt?was it running before you replace the timing belt? if so and it's not starting now then you probably have it out of time. if you waited till the belt broke to replace it then you probably have bent valves. if that is the case then you will need to pull the heads and have them repaired.