Alfredo Contaldovideo
VOLVO PENTA D2-55 heat exchanger tutorial: disassembly and overhaul of tube bundle and riser ⛵
5 March 2026 · 13 min · 4K views
Hand holds corroded, clogged heat exchanger core from engine.
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. 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
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