Since I intend to change the timing belt (with tension roller and deflector) and have read here somewhere that you should remove the valve cover, because of detecting the camshafts and so, I have also thought to install immediately new hydrostottles. Now my question, how many rams has my Essi and is it difficult to install the? It will make wool my brother, who is locksmith and has more idea of engines than I. The engine clacks in cold condition a little.