SB engine rebuilding got ya! School is Open!

I have noticed that people take the hollow bolt that oils the timing chain and replace it with a regular bolt thinking that it is defective or something. I tore down 3 small blocks lately and all of them did not have the bolt or a crank slinger. The teen that was in my car actually had surface rust on the block, behind the chain. The chain must have been screaming and no wonder the gears were all chewed up.