All 16v engines have the \ "problem \" that if the belt is broken, pistons brand valves and in most cases bend cranks in a few words it comes out cheaper to put another engine, or lightened or scarter than repair the one that has been broken. To change the distribution you need adequate tools, I do not know if you have them (a 1/2 and 1/4 inch carrack As much as I explain here in practice it is more complicated but if you dare I can make some drawings so you can see it when they tell me how it is done to hang them on the page My email is