Thread: Mainshaft into Flywheel Spigot Bearing- How Far?

I'm putting back the 186 that was fitted in my 2A which involves replacing the adaptor plate.

Engine Swap: Re-Alignment?

That low compression on No. 6 was the exhaust valve: the seat was a mass of very tiny pits. I found some grinding paste that must have been 25yo but it worked beautifully so we shall see when I start it up!

The alignment was superb! A mere 3 thou variation. Which goes to show that a well made adaptor will transfer OK provided the dowels are a nice fit.

For good measure, using a straight edge & vernier I checked the penetration (?) of the mainshaft into the flywheel spigot bush and got ~ 11.5mm. The bush is flush with the end of the crankshaft.

Is that enough?

The engine (173) that the adaptor was attached to had a bush that was about 15mm proud of the end of the crankshaft.

Yep that should be plenty, every spigot bush Ive put in is just an hammer in till its flush job