[Nonnie911]

MY daughters Xterra 2002 broke the timing belt so her brother is trying to fix it. I posted here hoping someone would be kind enough to help me.

 

[hellrazor762]

Hi. You came to the right place for info.
The engine in the Xterra is what is called an interference engine. This means if the timing belt breaks there is a good chance there is internal damage to the valves or Pistons. It is highly advised to take the "heads" off to inspect it before replacing the timing belt.

Here is a link explaining the interference engine: https://en.m.wikipedia.org/wiki/Interference_engine

Once you are sure there is no internal damage there is plenty of info here about replacing the timing belt. Hope this helps some.