I'm getting ready to change the oil in my 216 before firing it back up after refurbishing (no internal work done) Like many of these engines, my rear crank seal leaks, not bad but it does leak. Are there any products (oils, additives, etc) that might help this? I don't want to fix the seal right now because when I bought the truck, I started tearing it apart immediately. I want to get it back together and drive it a bit to see if anything else in that area needs attention.
