Building the Prototype AMD Series Engines

Valve Gear

Progress has not been as fast as I would have liked in recent months.  I have been working on the valve gear – i.e. cams, camshafts, valves, bucket tappets and all the horrible little fiddly bits associated with these parts.  I have broken the back of it now, so time for an update to the blog!

The cams were made using a cam grinding machine that I designed and made.  They were then case hardened and bonded to the silver steel camshafts using high temperature Loctite.

Bucket tappets were turned from steel and case hardened.

The valves were made from stainless steel and not heat treated in any way.

Cam guides are phosphor bronze (evil stuff to machine) and pressed into the cylinder heads with a smear of Loctite.

I am making SOHC and DOHC versions of both the 5cc and 10cc singles, but I am making two interchangeable cylinder heads for the 20cc in-line 4, one SOHC and one DOHC.

Pressing in the valve guides.

Cutting the valve seats with a home-made tool.

Valves.

Cams with master cam.

Case hardening the cams.