ok so i have to take the top of the engine off and change the seals/ gasket is it a pretty easy, cheap job? do i need any kind of hardener for when i re-seal the head? is there any way you may beable to walk me through a few of the steps and what parts/ tools will i need ive seen it done before but dont want to make anything worse . thanks for the help and how hard would it be to change my timing belt would i beable to do it my self?