My ford kuga 2015 model. Silinderhead gasket blow. Silinderhead were skimmed ford grage fix it. 5000 km later cambelt tooth were shredded off damage rokkers and valves. Due to cambelt failure acording Ford. Vehicle fix 40 km later new cambelt tooth shredded off rokkers broken and valves bend. Ford says cambelt failure again. Why? please help. Ford is fixing it again. Ford say new cambelt failure the reason. Can it be because the silinderhead were skimmed.?