As part of my '76 Cosmo
project, I just built a 6 port 13B NA engine and posted the entire process to YouTube. I then realized that the video applies to basically all 12A and 13B rotary engines, so I'm going to also post the video in the 1st, 2nd and 3rd gen forums for anyone who is building a rotary.
If you've never built an engine, or are just about to, then you want to watch this video. Covered is the entire build process of a 13B rotary including: measuring rotors, clearancing side seals, assembling all rotor seals, assembling the short block, setting eccentric shaft end play, assembling the "under the front cover" stuff and finally installing the front cover as well as torquing the front hub bolt. As far as I know, this is the only full process free
rotary rebuild video out there. This video, combined with the Haynes/FSM manuals, should enable anyone to be confident in putting together their first engine. While the engine shown in this video is a hybrid engine made from both RX-5 Cosmo and GSL-SE parts, the steps covered are the same for any Mazda rotary from 12A to 13B-REW.