Reply To: 1931 Model 42 Mosquito Sprayer

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Well, it took a week longer than I expected, but it’s all back together. I wound up having the exhaust valves dressed. They had little pits in the sealing surfaces that would not lap out. Now they are fine and the seats cleaned up with lapping. The intakes showed no wear at all and 6 out of eight had exactly the same clearance .006 from the last time I had the head off 15,000 miles ago.

As John predicted, I need to set my idle a little lower as it’s running better than it has for a couple of years.

I really do plan to tear this engine down in the future. But I can now feel good about waiting a couple years for that.

Bill