Prewar Es2 engine removal.

Have you got the relevant factory literature and/or the books by Franks or Garrett? Steps required for engine removal are outlined in the postwar maintenance books, maybe not in the prewar books. All ancillaries eg magdyno, carburettor, oil pipes, footrests, brake & gear pedals, exhaust pipe, primary drive & cases will have to come off first.

Recommended tools (beyond the usual Whitworth spanners & sockets):

C spanner for the cylinder head exhaust nut. Drifting around by the fins is not a great idea.

Small 2 leg puller for the magneto sprocket. Other methods are available but whatever else do not be tempted to lever the sprocket off against the timing case. Too likely to crack the case if the sprocket has a good grip.

Larger 2 leg puller for the engine sprocket, plus chain wrench to hold the sprocket while loosening/tightening.

Clutch removal tool may or may not be necessary. Some clutch hubs are a sliding fit on the gearbox shaft, others require a bit more persuasion.

Hope this helps, I'm sure others will chip in.

Ian McD

I'd remove the barrel before taking it out. Save a lot of weight. And remember if you have a Norton Twin...taking the head and barrel off a single is a positive joy compared with doing it on a Dommie!

As above, reduce unit weight by removing and protecting larger components. If the machine is up on a stand ensure it is secured as there will be a change to CofG as you reduce the build.    

The Mag sprocket puller will need to be of odd leg design as you will have to purchase on the sprocket and the chain as it is a continuous type. Spend some time to get it right as this is the heart of retiming your mag on rebuild.

 The attached are the only written words I have but it really is self explanatory.  The mag sprocket 

The following is based on postwar models but I think it should be relevant: Pay attention to the direction of insertion of the bolts holding the magneto platform. If inserted from the timing side you should be able to remove the magneto without removing the primary transmission at some future date. From memory, if inserted from the drive side the heads of the bolts will hit the inner primary cover before fully disengaged from the engine plates.

.......I did it wrong and it came to fruition a long way from anywhere.