my coolant pipe at rear of cylinder head looks rusty. anyone ever have one blow or rust out completely? any1 ever replace it and if so is it hard or expensive and or is there a aftermarket replacement that is bigger and allows more flow? I was even wondering if you could run a heater hose instead of a pipe with several bends?

 

Mine will drip a bit at times on my 06 but I just tighten up the clamps, but so far so good.