11 25 Pistons with Rings and Pins N63 B44
WARNING: This page does not describe the selected car, but rather 23 other vehicles, including the 2015 BMW Alpina B7L xDrive, 2015 BMW Alpina B7 xDrive, 2015 BMW 750i xDrive, 2015 BMW 750i, and 2015 BMW 750Li xDrive. However, it is still accessible from the selected car via links, so may be relevant.
PISTONS WITH RINGS AND PINS SPECIFICATIONS
| 1st groove | ||
| End clearance | mm | 0.15... 0.30 |
| Axial play | mm | 0.020... 0.060 |
| 2nd groove | ||
| End clearance | mm | 0.30... 0.50 |
| Axial play | mm | 0.015... 0.060 |
| 3rd groove | ||
| End clearance | mm | cant be measured |
| Axial play | mm | cant be measured |
PISTONS WITH RINGS AND PINS SPECIFICATIONS
| Piston and pin are paired to each other - replace together only. | ||
| Measuring point "A" (position) | mm | 10 |
| Piston diameter at measuring point "A" | ||
| Original (new dimension) | mm | 88.97... 88.99 |
| Repair stage (0.08) | mm | 89.05... 89.08 |
| Oversize (0.25) | mm | 89.22... 89.25 |
| Oversize (0.50) | mm | 89.47... 89.50 |
| Piston installation clearance (piston new) | mm | 0.00...0.03 |
| Piston installation clearance (piston worn) | mm | 0.02...0.05 |
| Permissible total wear tolerance between piston and cylinder (engine operated) |
mm | 0.15 |