S3 bell housing engine mount hole locations
Hi bianchi1,
The picture below shows my S3 bell housing from the engine side.
I only measured the six 11.5mm diameter through holes that are used to mount the bell housing to the engine block. If you need to know the locations of any of the other holes (starter motor, bottom access plate, etc.) let me know.
For clarification purposes, I chose to number the block mounting holes from 1 to 6 (yellow numbers in photo).
Here are the results I got with a set of digital calipers (hole center to hole center):
1 to 2: 41.79
2 to 3: 146.72
3 to 4: 155.85
4 to 5: 98.72
5 to 6: 93.18
6 to 1: 295.61
1 to 3: 183.40
1 to 4: 282.65
1 to 5: 302.52
2 to 4: 261.31
2 to 5: 294.21
2 to 6: 300.42
3 to 5: 231.02
3 to 6: 282.50
4 to 6: 183.49
I'm working on plotting these values on an AutoCAD drawing, which I'm sure would be helpful to a machinist or welder trying to fabricate a bell housing for an alternate gearbox. I'll post a copy of the layout when I'm done.
Enjoy,