Head gasket replacement

Maybe, but it would be a guess cause you did NOT post in the correct vehicle category. No way to know what year, make, and model you are referring to.

Mark thank you for answering,I have a 9/02 Mazda Tribute lx-v6,3.0 double twin ohcams,don't have a lot of money to send it to shop but I am mechanical, and both me and my friend are mechanics,we just never delt with cam situation, I need to know if there is a way to remove heads and timing chain from top of engine without bending valves if we do it wrong

See if you can find a service manual or get a Haynes or Chilton manual at your local auto parts store. It will outline the correct removal and head replacement procedure.