Sailing NVvideo
Our Engine Room Is Flooding… Where Is the Water Coming From? | S3 Ep 21
September 27, 2026 · 20 min · 8K views
What this video covers
Water pooling in the engine room of the 66-ft former ocean racer NV prompted an investigation into a potential leak from the recently installed Nanni engine.Watch After drying the bilge and running the engine to observe the source, the crew identified a faulty siphon break as the cause of the saltwater intrusion.3:40 The siphon break, designed to allow air into the cooling circuit when the pump is off, had failed to seal properly, allowing seawater to leak into the bilge.6:20 To mitigate the risk of corrosion, the owner cleaned the affected area with WD-40 and diesel fuel.9:32 He disassembled the siphon break, greased the internal rubber seal, and reassembled the unit using thread-seal tape.15:53 While the repair resolved the immediate leak, the owner plans to relocate the siphon break higher above the waterline to prevent future flooding risks.13:35 The repair confirmed that the engine installation itself remained sound.18:28
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