I’m actually going to have a full-on 3-angle valve job done on this head next week. More on 3-angle valve jobs later…
Regardless, I wanted to show the basics of lapping valves.
Figured it’d be good to show a general overview.
I made a quick video. I’m sick today… Hear me sniffling?
This ring below is the valve seat.
You can see below, the valve sits in the combustion chamber and needs to sit as closely / tightly as possible to the ring on the combustion chamber. Over time I guess the seat gets worn and can start leaking which causes lower compression and a weaker engine.
Another view below to see how the angle of the valve sits on the angle of the ring in the combustion chamber. This is really what is happening. You want the angle of the valve to perfectly match the angle of the ring in the combustion chamber.
This is the grinding material and lap tool.
See how the suction cup thing holds the valve.
2 responses to “Lapping Valves”
Published - Sep 23, 2012
Spent the day exploring Acadia. We finally got some great weather so we took full advantage of it. We did a short hike in the morning and then spent the rest of the day exploring the island on the cycles and enjoying the twisty roads. One of the many awesome views of the day.