Injector seals, Piston liners with electrolysis pits (although Cat liners are very hard and tough) oil coolers, lord forbid cracked block / head. I pull the pan and pressure things up to get some idea of where it is coming from.
Regards, Krunch
Add leaking liner seals and pitted pre-com chambers to the list.
Old Magnet you are a 100% right, Just giving the short version. ----What side of the liner is the water leak coming from --- piston side or packing side. Is the water getting to the pan from an oil galley? Or, down the push tubes? At any rate a lot more work to do.
Regards, Krunch
I would put money on a holed liner in one of these machines.