I need some advice!!! I have an astra 95 plate 1.4 engine. It has an oil leak coming from somewhere under the left hand side of the engine, I have had the crank oil seal replaced but this didnt do anything, I have been told that it maybe the oil pump seal that gone. Could anyone tell me how hard this job is to do?? I have been quoted £200 for the job, I was also charge before when having the other seal doing so it sucks really because i dont really want to pay out again.