what engines are interchangeable with a 2002 elantra, i just got one with a blown motor and i cant seem to find a decent priced engine.

 

What's "blown" about it? It may be cheaper to fix than to replace.

 

timing belt broke, will need a new head, timing belt, and possibly some new pistons, it will just be faster to swap an engine but i don't know wich ones will fit

 

Having removed a head and removed/replaced a timing belt, and having removed an engine/transmission, I'm going to give my opinion that it would be less hassle to replace the head and timing belt.

Pull the head and see what you actually have in there.

... my parts car died when the belt broke and the previous owner could have had her back on the road with just a new belt and 6 intake valves ($150 in parts) but they weren't mechanics.

If you can replace an engine, you can replace the head. And if you pull the head and find the pistons are holed or the block is shot, it's not THAT much more work to replace the engine. But if all you need is a head, or a couple of valves, that's potentially a lot cheaper than a whole new motor.

 

Yeah, usually you won't need to replace the pistons. Our pistons are pretty durable. Drain the coolant, then pull the spark/valver/timing covers off and pull the head bolts to inspect the pistons.

 

To answer your actual question though, SEARCH!

This has been asked a few dozen times.