Well this makes me nervous, but I’m putting it out there.
VALVE LAPPING
I’m , not real happy with the results I’m getting here. My valve seats had pretty deep rust pitting. In order to remove the pitting I had to work the lapping compound for a rather long time. Here you can see what the seats looked like prior to starting, and after.
Doing this by hand was taking forever, and my arms were getting tired , so I switched to using my cordless drill.
Low speeds, up and down, reversing often. This was much easier.
The problem is, the rust pitting is pretty deep, and in order to remove it all, I have to go at this lapping for quite a while. And what I’m noticing is, after a while grooves start to develop from the abrasives, and what I believe is happening is, the compound then collects in the grooves. When I try to lap longer to remove the grooves, it only serves to widen the seat and deepen the grooves.
Here are some detail photos.
In this photo I stopped lapping the exhaust valve on the bottom before all the pitting was removed. Photo shows the grooves which look like rings going around the valve seats. Note the valves have developed similar grooves, maybe less deep.
So give me some good news here. Tell me this is salvageable without cutting new seats and buying new valves.
Scrub and blow them parts out 'bout a gazillion times!!
