hey anyone out there can help me out here.. my mechanic said tht my engine heated up and because the engine was on whn radiator was dry so my gasket burnt and probably caused my 'head' to bend. does this refer to piston head? or cylinder head? and he says tht they need cut the head to even it out again. is this a good thing? any negative impact? and can anyone tell a rough estimate how much it should cost to replace gasket and cut the head?