Date registered: Dec 2011
Vehicle: 2008 R320 CDI, 2006 smart fortwo cabrio, 1983 240D, 1982 300SD, 1980 300SD, 1978 280SE EURO
Location: Oxford Mills, Ontario Canada
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There are MANY places for the diesel engine to leak oil as well as the steering rack. The engine commonly leaks from on top of the engine, the crankcase breather/blow by hose to turbo inlet hose, the oil cooler (big job), it is very difficult to clean it properly and find the source, I have witnessed it first hand on my own were they claim rear main seal and oil pan but neither were leaking in the end after properly cleaning and waiting. There is a wierd drain chanel of some sort that lets the oil off the intake valley area and down the back of the engine via the bellhousing area, so it always looks like a rear main seal and make a huge mess back there coats the transmission, exhaust, driveshaft etc. For sure the turbo intake seal/blow by hose is a common problem that keeps coming back, the oil cooler I have not tackled yet but hear it is a real big job (10+ HOURS) and not for newbies. Of course there could be other leaks too, but this my experience with these engines and usually long before 230kms, more at 100-150kms they start leaking.