I have an earlier engine with the Aluminum cast 3-rifles tappet cover, and a later spare engine with no cover. Looks simple enough to fabricate a steel version, but wondering how thick the original was made. If somebody has an original laying about, could you measure it's thickness for me?
Thanks, Vincent

email (option): vinver@ns.sympatico.ca

They are 3,2 mm is that 1/8" ?

Henk

email (option): ahum@quicknet.nl

So take 4mm sheet steel, and file down to 3.2mm; excellent exercise, both for your arm muscles and state of mind

email (option): viaconsu [at] planet [dot] nl

3.2mm is 1/8" give or take a thou or two...Ian

email (option): ian@wright52.plus.com

Thanks, I had figured it was probably 1/8 steel. Actually a kind member has offered me a surplus cover so I wont' have to work out my arm muscles, wouldn't want to look too buff! Thanks James!

email (option): vinver@ns.sympatico.ca

In any case the tappet cover thickness is not a critical dimension so no problems if a replacement one is thicker.
just use slightly longer bolts.
A lot of WM20's had as steel cover to save aluminium for aircraft.
I have seen steel ones some plain, some engraved with the crossed rifles while others have a contract plate riveted to them.

email (option): wariron@tpg.com.au