4 Cylinder OHV Engine new cylinder head. A work in progress

[putputman]

Geo, that photo of your valve seat cutting tool tells it all. With the undercuts at the pilot and angle assures that you will get a good sharp valve seat. The pilot, angle, & shank can all be cut in one set up that will result in a zero TIR.

I am building a small single cylinder engine with a 3/8 bore that will require two valves and a spark plug in a small area. Plan to use a couple of hardened Royal Punch Pins for the valves. They have a 60 deg (120 included) angle head. The pins are manufactured by swaging the heads, consequently leaving a parting line, or seam, or ridge, on the angled surface. If I can grind that surface true, I will use them. I would then make a valve seat tool, using your design to match the valve.

Thanks for the post.

 

[ariz]

I'm thinking to do the same too, to restore (or remake) the valve seat on the power head of my scuderi engine

thanks gbritnell