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

Home Model Engine Machinist Forum

Help Support Home Model Engine Machinist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
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.
 
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
 

Latest posts

Back
Top