Miffi’s 1275 A+ Engine (12A) Rebuild (Part 3): the thing with the spring

Just a very short update today. While it is taking much longer then I hoped for, the Mini engine is almost completely back assembled. And even though I started with a good plan and kept fasteners and small part in small plastic boxes – I ended up wasting a few hours searching for stuff. Pretty much all components below are straightforward. To torque down the clutch/flywheel screw ti 150NM, I needed a way to lock the flywheel. For this I created a small helper in CAD – but needed five or six attempts before the teeth engaged perfectly. To my surprise a standard PETG basic print with default settings was strong enough – as it locked on the corner of the case.

The spring that is required for the gear selector shaft in the diff housing kept played a bad joke on me. As mentioned before, I ordered a new on from Limora, as the one from Minispare previously did not arrive. They were quick with delivery, but due to work I could not get to the garage for a few days.
When I did – the spring (which I stored away safely as I remember) was nowhere to be found. I cleared the entire workbench, looked as every small piece in the garage cans. Nothing. Frustrated I order yet another on from Limoa – which arrived last friday.

And of course – just after checking freeplay of the diff the next evening – I found the bloody thing right no on desk. Maybe I find the time tomorrow evening to complete everyhting and get the engine back in the car. But the Horneland Rallye is coming up this Friday and Saturday – and I will be Navigator in Martin’s Mini Cooper S. So the next updates is most like from the rallye.

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