i took the rocker cover off to have a better look.and i didn't have to go any further...3 of the followers where shattered,the only thing what came to mind was that the engine had been raced very hard.and upon asking my son in-law what exactly happened for the car to conk out..He said that he was slowing down through the gears when it happened...anyway i think that he went into first from forth,causing the racing of the engine and the outcome of it... the local vauxhall garage is putting it right,and i think he's got away with it cheap at £130.