Because pistons for diesel engines are subjected to both high thermal loads and high pressures, stability is crucial. Nüral has developed a special piston with a ring insert in the top-ring groove area to provide the necessary stability.

Made of alloy cast iron, Nüral ring-insert pistons:

• Protect the groove sides against deformation and wear.
• Prevent pounding out of the ring grooves by the piston rings.
• Prevent the engine from coming under pressure.