Thanks, very helpful responses, appreciated.

I am assembling my 57 S4 engine, I would like to incorporate an oil pressure gauge but cannot see a suitable connection point on the engine. I am reluctant to drill and tap into the internal pressure galleries, any ideas? Thanks.

Thank you Roger, much as I thought but good to have it confirmed.

Hello All,
Finally ( after 2 years on the bench) assembling my 57 Mk11 engine, the crankcase is assembled, but I have a question, how tight should the large nuts on the ends of the crankshafts be? I havent found any reference to this, I have the Waller book, plus scoured whatever I can find but ...

Hello all, I am assembling a 57 Square 4, just about finished the bottom end and starting to think about installing the cylinders. I have a lifetimes experience rebuilding British bikes but this is the first S4.Trying to figure out the best way to replace the cylinders, several ideas but I thought I ...

Thanks everyone, I have now located a new set of rods which are on the way

Hello, I am about to start rebuilding my 57 S4, been delayed for over a year due to work but finally getting started. Does anyone have any information on the replacement con rods that were to be manufactured? I was put on a waiting list some time ago but no response so far. I want to build the bike ...

Hello all,
I am about to start assembling my ‘57 S4 engine, planning ahead and reading up as much as I can. I have the Otto head gaskets, reading the assembly instructions I find the instructions a little ambiguous regarding the initial installation. The instructions are clear for the re-tightening ...

Thanks, I had already crack checked ( i own a commercial machine shop so no problem to magnaflux the rods and bolts) however there is a variation of up to 0.010” in the lengths of the 8 bolts, the longest being the 2 new bolts, so nothing to use as a comparison. I am at the point where it all looks ...

Greetings and Happy new year from Manitoba in winter. I am about to assemble my Mk2 Square 4 engine. I have reconditioned the original rods but was unable to find a full set of new bolts. Does anyone have the exact length of the original bolts? I want to measure and check the originals have not ...