Info required Stuart Turner 600 i/c gas/petrol engine

I am restoring a Stuart 600 engine,does any one have set of dwgs,? Does the dwg state what type of sealing ring or material is used to seal the cylinder liner into the engine bed ,full size engines eg Ruston Hornsby and other makes usually used a rubber o ring.My stuart liner has a groove in the liner and the bottom of the groove slopes a 10/15 degrees towards the head end of the liner ,it may be that soft packing was used and the slope on the bottom of the groove compresses the packing as the liner is pushed into the aperture in the bed,or is the angled groove not to dwg and just the idea of the builder as all 600s were only supplied as castings,though some larger parts could be supplied finished at extra cost. Also does the dwg specify what threads to use ,my engine uses BSF so I am assuming that it may have been made in the 1930s, they appear to have been made as early pre ww so I would expect early ones would have Whitworth threads.I would be grateful for any info as I do not want to get it restored and running and then get water leaks around the liner.

The 800 has a similar shaped groove and notes say "groove for rubber sealing ring"

Mix of BA for the smaller items and some BSF on the larger.

Thanks Jason, I will try an O ring,

Hello Nigel, just found your "old" post. I have aquired a part machined set of "600" castings and need a bit of help,namely info on valve springs; lengths, wire guage, no. of coils,inner/outer diam. Everything I can think of! Can you help at all? David C.

Usually for wet liners the cal block has grooves machined in to take 2/3 the depth of the O ring, the ring and liner are then liberally coated with blue Hylomar and GENTLY pressed in by HAND. You can bolt a strap across the liners until the cyl head is fitted but these must not be very tight. Wouldn't mind a pound for everyone of those I've fitted.