Alfredo Contaldo · video

What this video covers

Removing and servicing the heat exchanger and exhaust riser on a Volvo Penta D2-55 engine requires draining the coolant, disconnecting electrical components, and extracting the tube bundle for cleaning. On a Bavaria Yachts 44, the process begins by closing the raw water intake and draining the engine coolant through the heat exchanger drain plug.3:37 After removing the air filter and the MDI control unit to gain access, the exhaust riser is unbolted from the manifold.7:03 The heat exchanger is then detached from the engine block by loosening its mounting bolts in a gradual, sequential pattern to protect the gaskets.8:17 Once removed, the end caps are unscrewed to expose the tube bundle, which is extracted using a rubber-handled tool to avoid damage.10:57 Clogged tubes are cleared by soaking the bundle in a vinegar solution for 24 hours.11:50 During reassembly, all O-rings and gaskets must be replaced, and a torque wrench should be used to ensure proper bolt tension.12:37

Boats in this video

More from Alfredo Contaldo

Sailing from Sardinia to Menorca ⛵ 200 miles beating against the wind ⛵ Sailing Vlog EP.3 ⚓Aug 2026⛵ STUCK by the MAESTRALE in SARDINIA⚓30 knots at anchor - Trekking 🥾 and Snorkeling 🤿🌊 sailing vlogJul 2026From Sicily to the Balearics by way of Sardinia ⛵ 460 miles by sailboat with Maurizio EP. 1Jul 2026How to pass the chartwork exam for the boating license beyond 12 miles in 2026Jun 2026

From Alfredo Contaldo — 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.