I always use Wellseal if it,s good enough for Rolls Royce then good enough for a old BSA. Plus you dont get particles from this sealant going into oil ways etc..
I use different products depending on the application...Silicone sealant, Yamabond or grease...For the crank case joint it would be silicone usually...Ian
Im hoping this is on topic enough to post on this thread..Some years back,during the process of shifting house I damaged a pair of BSA M20 crankcases. They were loosely together & fell onto the floor. 3/4 of the lipped seal between the halves broke clean off. Ive been told modern sealants would work on these and make them oil tight & useable again. What is the forums opinion on this?
The crank case register (the lip and recess) was machined in the same operation as the main bearing housings and its purpose is primarily to align the crank case halves, and thus the main bearings, accurately.. With a damaged register, or no register as some engines have, it becomes a face to face joint like any other gasket face and can readily be sealed with silicone or similar...Ian
