The water comes from condensation and leakage in the boiler feed pump piston glands. It's dealt with by using special 'Crank case oil' which is formulated to enable water to separate out from the oil quickly and sink to the bottom below the oil itself. A drain valve is provided to enable the water to be let out periodically.
|Front engine sump cover in place showing the water drain valve|
The only way to find what was happening was to remove the crank case cover and have a look. It wasn't a difficult job but required the oil to be drained first (about 11 gallons of it!).
There was at least 1/2" of thick sludge in the sump.
|Nice! Gungy viscous mess about 1/2" deep or more|
|Coarse filter as found|
|Coarse filter after (it's not from a beehive!)|