The dripping won't be done for about a month...
You must replace that bolt and nut, and no lockwasher. To leave them here is just asking for trouble. A rod bolt is one of those fasteners where you can't take any chances.
Lockwashers don't belong inside an engine. They are prone to breaking, then you have two pieces of metal in your oil pan and a loose fastener.
On a modern engine it is recommended / required that you replace the rod bolts. They stretch with the initial torque and don't do the job as well the second time around.
I don't think it's necessary to replace all the rod bolts in a 235, but it would be a good idea.
Grigg
