Hi my 2 litre diesel estate 92,000 miles has been leaking oil steadily for a while now. I left it in with my mechanic and he is baffled as to what is the cause. He says there is more than usual backpressure coming out the filler opening but none from the dipstick. He thinks this backpressure is forcing oil out someplace. And this might indicate an engine rebuild. This time last year I spent close to 5 grand on high pressure oil pump and a new turbo (not to mention just having had the timing belt done), so I really don't want to get into more expense. Does anyone have any ideas/suggestions?
These Mazda 6's are another troublesome diesel engine and suffer from a variety of problems (turbo, oil pump and cam wear). I assume that your mechanica has done the basic checks on the breathers and intake system? If so then I would tend to agree with his diagnosis that it blowby due to general engine wear.
PS I think you meant you spent money on HP fuel pump, not oil pump?