Originally Posted by
Graeme
The last time that I checked, the part numbers for the 4.4 inlet manifolds haven't changed since the start of the L405 and I haven't read of other than a few MY11 L322 4.4 manifolds splitting and therefore yours shouldn't be at risk of splitting. However, check the manfolds under the sound insulation just in case and perhaps replace that manifold in case of a small split even though it can't be spotted.
I don't know of any other common source of oil from the rear of the engine.
