KIWI Mk2
I/C ENGINE BUILD
Part 20 By Vince Cutajar
KIWI Mk2
I/C ENGINE BUILD
Part 20 By Vince Cutajar
Made the two valve collets. Fiddly little things. Used a piece of 5mm mild steel. Faced it off and drilled a 2mm hole about 6mm deep. Transferred the piece to the milling vice and after locating the hole under the spindle, used a 2.5mm slot drill to open it up. Then using the y axis, milled the slot. Transferred the piece back to the lathe and parted off two collets. After cleaning them up, did a trial fit in the groove I made previously.
Reversed the part and machined the other side. There were no dimensions on the plans how thick the lip is. Also there is a shallow taper but no angle indications. So I improvised. Made the lip 2mm wide and the taper of 2 degrees.
So I pressed them into the head but before doing that I made a tool to make sure that they are pressed in straight. New photo is showing the tool. I indicated the valve guide hole under the mill spindle. Then I clamped the thick part of the tool in a collet and put the valve guide in the stem of the tool. Pressed the valve guide in the head with the quill.
Both valve guides in the head and the valves installed with the springs.
The bottom of the head with the valves.
Part one part two part three part four part five part six part seven part eight part nine 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27