Enclosures and housings
M54B25 bottom end - block, crank, pistons, rods
- Bounding box
- 634.1 × 310.1 × 540.0 mm
- Engine
- Precision B-rep
- Parameters
- 8
- Published
- November 8, 2026
Download
Free to download and use. See the terms.
The prompt
Build a full BMW E61 from 2004 with the M54B25 engine and 6HP21 transmission, very detailed, every part designed separately. Module 2a: M54B25 bottom end - block, crank, pistons, rods, pan, front cover.
Parameters
| Name | Value | Range |
|---|---|---|
| Bore (M54B25 = 84) | 84 mm | 70 – 85 |
| Stroke (M54B25 = 75.2) | 75.2 mm | 65 – 82 |
| Connecting rod length | 135 mm | 125 – 140 |
| Cylinder spacing | 91 mm | 90 – 100 |
| Deck height above crank axis | 225 mm | 220 – 240 |
| Crank axis height above ground | 320 mm | 290 – 360 |
| Block rear face X (front axle = 0) | -100 mm | -150 – -50 |
| Crank angle (cyl 1 pin from TDC) | 0 deg | 0 – 360 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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