Piston With Rings - General
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2021 MINI Cooper, 2020 MINI Cooper, 2019 MINI Cooper, 2018 MINI Cooper, and 2017 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.
B36 ENGINE (COOPER BASE):
PISTON WITH RINGS AND BOLTS SPECIFICATION
| B36 (1.5L) Piston and pin are paired to each other - replace together only. |
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| Piston diameter at measuring point "A" (see illustration) | mm | 10 |
| Nominal dimension of piston diameter | mm | 81.958... 81.996 |
| Piston installation clearance (piston new) | mm | 0.03...0.17 |
| Piston installation clearance (piston worn) | mm | 0.03...0.20 |
| Permissible total wear tolerance between piston and cylinder (engine operated) |
mm | 0.25 |
B46 AND B48 ENGINES (COOPER S AND JCW):
PISTONS WITH RINGS AND PINS SPECIFICATION (1 OF 2)
| Piston and pin are paired to each other -replace together only. | ||
| Piston diameter at measuring point "A" | mm | |
| Original (new dimension) | mm | 81.978... 82.016 |
| Repair stage (new dimension) | mm | |
| Oversize (new dimension) | mm | |
| Piston installation clearance (piston new) | mm | 0.03...0.17 |
| Piston installation clearance (piston worn) | mm | 0.2...0.20 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | mm | 0.25 |