Comment by ErroneousBosh

The Peugeot XUD engine that powers the Citroën C15 (and a whole bunch of other European cars of similar vintage) is what most of the small Ford diesels were based on, right until they got into the "wet belt" nonsense.

I have "repaired" one that was used to power a small fishing boat (it came out of a Xantia, and the hydraulic pump was used to operate the shooting gear). The boat sank and the engine compartment was flooded with sea water for about a week. It started up and ran quite happily after draining what was approximately a 50/50 mix of sea water and sludgy engine oil and putting fresh in, then removing the injectors and cranking it to blow the water out of the cylinders.

It never quite ran right after that and was hard to start, and five or six years later the boat's owner replaced it with another Xantia engine, this time the turbocharged version.