Well I left my motor in the rain after my dumbass took the head off and sold it. The block was completley full of water but I dried it off . Well the block already has a thrown rod bearing and I had the block ready to be rebuilt by myself. (first time rebuild BTW) . Could the rain have caused any more problems.

 

Rust on the cylinder walls perhaps. Might be enough to hone or maybe overbore it.
Could be just fine. For how long has it been out in the rain? One night?

If no rust, then you most likely don't have a problem.

 

since everything is going to have be be taken appart, nothing to worry about.

 

I would atleast hone if not over bore.

 

just get it bored and hot tanked