Sailing NVvideo
Emergency Volvo Penta Heat Exchanger Overheating Solution | S2 Ep 50
March 17, 2025 · 22 min · 10K views
What this video covers
The Volvo Penta MD 2040 engine on the sailing yacht NV suffers from chronic overheating caused by a failing heat exchanger insert.2:40 Corrosion at the brazed junctions between the brass tubes and the end caps allows saltwater to mix with the engine's fresh water coolant, leading to constant overflow from the expansion tank.2:24 Initial attempts to repair the brass insert by local welders proved temporary, with failures recurring after approximately six weeks of use.7:54 The crew also identified secondary leaks in the fresh water pump and severe corrosion on the exhaust elbow and thermostat housing.19:06 After a second-hand replacement insert sourced from New Zealand also failed, the crew continued to operate the engine by flushing the cooling system with fresh water after every run.15:13 The ongoing degradation of the engine's casting and internal components necessitates a full engine replacement, as the original parts are no longer in production and repair attempts have reached their limit.13:26
More from Sailing NV
From Sailing NV — see the channel’s boat, crew, and every analyzed video.
The Sailing Directory Newsletter
One email with the fleet's best finds — the moments, boats, and stories worth your watch time. Enter your own address to get your own copy.