I need some help. I'm average around the shop. I have never taken a head off, but will need to pull for the removale of a piston. Mechanic said I have a piston pin making noise in one of the back three. Is this a straight forward job that someone with average skills and basic hand tools could accomplish. It's a FJ62, had the engine rebuilt less than 7,000 miles ago but timed out on the work.