Would the timing chain on my 2003 honda element cause tbe pistons to break.

What is your question?

I recently damamaged the radiator on my honda causing me to replace it. After it was put in the mechanic noticed to wasnt sucking in the water so the head must be warped. Fine, got the head shaved put back on without a pressure check done, so said adjusted the timing and gave it back to me. the idline was off,for instance stopping at a stop sign the motor would rev up and down and almost die until it finally did at a red light tnd would not resart- no sound whatsoever! Used jumper cables-nothing! All of a sudden it finally started but making all kind of horrible noise i killed it abruply.Now before giving it back he said he test drove it all the way up to 90 mph. He said he noticed the transmission or the rpms were winding up too high so he changed the trans fluid and changed the oil. He said nothing about putting his hands on the timing chain until i was broke down at a light in town. He thought he had adjusted it rite but it could of slipped! Now Im having to buy a new motor at a good deal i might say. All Im asking is was all this caused from me runnin it hot for about 2 to 3 miles which didnt crack the head or becuz the timing locked up the engine and broke the pistons and whatever else under there i dont know about?