20b / COSMO FSM for rebuild

[imebgo]

Hi,

Need a 20B service manual, or something to help with rebuilding a 20b.  Can anyone point me in the right direction.  I have found some non official stuff on google, but I would really like a service manal.

Thanks,

James

[kev-yorks]

There is no Mazda service manual covering the 20b even dealers where not given one they where instructed upon finding a engine problem to contact head office and start removing the engine while a replacement was sent to do a straight swap. Most items are similar in type and assembly to the 13b used in the FD if that helps.

[imebgo]

Thats what I have been reading.

Im just looking for some explanation about the differences between rebuilding a 13b / 20b.

Things like, order of bolts for building each housing etc.. anything I need to look out for when building the eshaft, the center stationary gear etc...

Tolerances will probably be the same, which is great because I can refer to the FD manual, but I dont want to miss something out.

Thanks,

James

[frank20bcosmo]

Hi James
 
Nice to hear your rebuilding a Cosmo,, which model have you got and year etc,, I had my 20b rebuilt last year but I left it to the experts as didn\'t have the knowledge or the time

[imebgo]

Its going in an FD (hopefully!)

Im going to look at getting Hayward rotary to do most of the engine work, some porting and anything that I can not do easily enough.

If I can find out how to rebuild it with confidence, then I may assemble it myself, also depends on the final budget.. !

James

[kev-yorks]

If thats the plan speak with Carl explain you want to do as much as poss your self i\'m sure he\'ll work with you with the engine.

[Speedworks]

I think there is a manual/ info on rx7club.com or talk to \'HWND\' on that forum

[kev-yorks]

There is a jap version of the Cosmo service manual but all sections regarding the engine are ommitted. Anyone requiring a copy i have a pdf version i can email

[HaywardRotary]

Hi James,
We are more thanhappy to assist with the build.
Kind Regards
Carl