The D8 engines we tested in the Cruisers Yachts 54 Cantius were assembled there. Each cast-iron block has replaceable valve guides and seats. This gives each Volvo Penta engine a long life while ensuring that seasoned engines can later be brought back to life, refitted with new parts. The crankshaft is drop-forged, and its seven bearing surfaces are induction-heated and cooled for consistent hardness. The process uses electromagnetic charging to heat and then cool the surfaces for optimum hardness. Too much and they are brittle. Too little and they are soft, loosening over time. In the factory, all processes are computer-controlled and robotically executed while technicians monitor every step of the process to ensure the machinery is doing its proper job.