'95 olds delta '88 engine leak

My daughter's car overheated and we discovered a leak of radiator fluid from a l" in diameter hard tube that is "L" shaped on the right side of the engine. It exits a silver block and goes left into the engine. Where can we get a diagram of the engine so that we will know what this is? Help will be appreciated. Is this something that we can repair, or is it a job that has to be done in a shop?

That is the bypass pipe.
You will have to loosen/ remove the belt tensioner bracket to replace the pipe.