I see Caterham state this engine needs a new cambelt at 6 years. My Roadsport 150 Sigma is now 6 years old. I get some work by a good local small garage mechanic but when he gave my Reg No to his parts suppliers their system didn't recognise my car (as usual!!). I rang a local Ford dealer but same issue and they couldn't look it up from the engine No. To get the right cam belt, cam belt kit with water pump etc I am told I need a Ford engine code, eg HWDA My car was registered Nov 2008 and the engine No starts S4-236--. Any advice on the engine code and best place to get parts? Thanks