If it's oily, it's likely the bolt that holds the oil pump in place. It would have a jam nut on it as well. Here's a pic of a 235 I was tearing down. The 216 has the same retaining bolt (2nd Pic.)
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IMG_7621.JPG (33.74 KB, 191 downloads)
IMG_7757.JPG (227.81 KB, 187 downloads)

Last edited by klhansen; 03/05/2026 11:04 PM. Reason: added 2nd picture

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.