CONSTRUCTION
The piston is made of aluminum alloy which excels in high-temperature strength. The skirt portion has been tin-plated to achieve wear resistance.
A cooling channel has been provided at the upper part of the piston to improve the cooling performance.
To improve the wear resistance of the top ring groove, a Fiber Reinforced Metal (FRM) ring carrier is used.
The surfaces of the No. 1 and No. 2 piston rings and of the oil ring have been gas-nitrided to improve their wear resistance.
| *1 | Cooling Channel | *2 | FRM Ring Carrier |
| *3 | No. 1 Compression Ring | *4 | No. 2 Compression Ring |
| *5 | Oil Ring | - | - |