Ls6 Steam line help
It sounds like you have your steam line hooked to an old-style overflow hose, which will allow coolant to simple pour on the ground as you drive.
You can run into the upper rad hose, return heater hose, radiator tank fitting, or tap the pump, and your radiator cap will regulate flow into the overflow tank. I think having to drill and tap a pump is a dumb idea just because I might go out of town and what would I do if the pump went out. I use a pressure surge tank with a steam line fitting.
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****, I never thought of that!! And I just spent $15 on a cylinder head fitting adapter.
also has to stay on pressure side of cooling system.
and here is a pic of my drill / tap in truck h20 pump.
I pulled the pump since the gaskets are common fail point. and sure mine were ready to pop .






