Magdyno timing case oil seal

[DEDGE]

I All
Got a new oil seal for the Magdyno shaft in the timing case and it is loose in the holder, Has any one had this if so is there a remedy, 1950 B31
All the best
Dedge

[AWJDThumper]

I'm not familiar with this engine but I assume the seal is a push fit into the casing? If the seal is a loose fit, I would measure the ID of the casing and the OD of the seal and see whether there is an obvious problem. It's difficult to see how the holder could have changed its dimensions but is the seal the correct OD. If all else fails you could always fall back on using a Loctite retaining compound to keep the seal in place.

[MALCOLM.JOHNSON]

If the seal is a good fit on the magneto shaft, but a loose fit in the recess, would suggest a seal that is slightly undersize. I cannot see how the recess could wear. I would not let it worry me too much, but fit the magneto properly fastened down and offer the seal in place and see if it all looks concentric - magneto bases/crankcase platforms can wear badly if run for prolonged with the clamp loose. Rectify with appropriate shims locating pegs etc. etc. and when ok the seal can be glued in place. I would go for silicone if there is an appreciable clearance or Loctite as suggested if minimal.