Pistons with Rings and Pins, BMW, N55, B30
PISTONS WITH RINGS AND PINS SPECIFICATION - 1 OF 2
| Piston and pin are paired to each other - replace together only. | ||
| Measuring point "A" (position) | mm | 12 |
| Piston diameter at measuring point "A" | ||
| Original (new dimension) | mm | 83.98... 84.01 |
| Repair stage (new dimension) | mm | 84.06... 84.09 |
| Oversize (new dimension) | mm | 84.23... 84.26 |
| Piston installation clearance (piston new) | mm | 0.01...0.03 |
| Piston installation clearance (piston worn) | mm | 0.02...0.08 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | mm | 0.15 |
PISTONS WITH RINGS AND PINS SPECIFICATION - 2 OF 2
| 1st groove | ||
| End clearance | mm | 0.15...0.30 |
| Side clearance | mm | 0.020...0.060 |
| 2st groove | ||
| End clearance | mm | 0.30...0.50 |
| Side clearance | mm | 0.015...0.060 |
| 3rd groove | ||
| End clearance | mm | 0.20...0.90 |
| Side clearance | mm | can't be measured |