Some exciting things about 210 BPD Engine Block
- camshafts are hollow-cast to reduce weight, each camshaft being 500 grams lighter than a comparable solid camshaft
- exhaust valves are sodium cooled. Encased within each thin, hollow, 6-mm valve stem is metallic sodium, which when exposed to heat, liquefies and helps dissipate heat from the head of the valve.
-metal reinforced piston is about 10 percent lighter as compared with an aluminium piston with Niresist top ring groove, and according to Mazda's testing has an extended piston life by threefold. The piston's skirt is also zinc-plated for improved wear resistance, and its inside is cooled by an oil jet.