Piston: Specifications
M54 2.5L/3.0L Piston| Piston and Pin are a matched set only replace together | -- | -- | 
| Measuring point "A" (position is 90 degs. to pin from lower edge of skirt) | mm | 8 | 
| STD.  From point "A".  | mm | 83.995  (+/- 0.014)  | 
| 1st oversize     Only permitted for aluminum blocks with cast iron liners.  | mm | 84.245  (+/- 0.014)  | 
| Piston running clearance | mm | 0.01 - 0.04 | 
| Pemitted total wear tolerance piston/cylinder  engine operated  | mm | 0.15 |