Today I checked the valve lash on all 16 valves. Here are the results:

1   155    E    0.030
           I    0.030

3   165    I    0.029
           E    0.029

5   165    E    0.030
           I    0.032

7   158    I    0.032
           E    0.032

2   170    E    0.029
           I    0.034

4   150    I    0.029
           E    0.032

6   165    E    0.030
           I    0.030

8   160    I    0.031
           E    0.041

The exhaust valve lash on cylinder #8 seems really loose! Andy recommended setting the valve lash to 0.028 on all the intake valves and 0.030 on all the exhaust valves. I went ahead and did that. I am going to have to watch cylinder #8 and see if the exhaust valve gets loose again. That would indicate a busted adjuster.