Q:     I recently purchased a 1971 MGB. I�m looking to drain and flush the coolant system and I notice that the radiator has no drain plug. I assume this is the way they came? Can you fully drain the radiator by pulling off the lower radiator hose? Is there a better way to drain it, without removing the radiator? Do you know if anyone has designed a modification to the lower tank to accommodate a screw-in type drain plug?

Thanks for your help.

Jack Wheeler

West End, North Carolina

A:     Yep, this is the way they came. And other than the oversized aftermarket units, OEM style replacements would be the same. There�s room underneath to put a drain in, and they used to sell a universal kit for that, but I have not seen it lately. Most cars these days are already equipped with one and/or have plastic cores that would not accommodate installing one. If this is something you feel you really need, I�d mark the best spot and remove it to do so. Maybe even bring it to a shop that specializes in radiators. I have my car almost 25 years and never found not having one much of a hindrance.

On the '71, like my '73, the lower hose connection is bent up at the end a bit where it connects to the lower hose from the engine. In flushing the system, I drain it by removing the hose and usually just keep putting fresh water in until it�s clear coming out. Otherwise, as you note, removing it entirely is the best way.

I hope that helps you. Let me know what you do and take pictures if it�s something new.

Art Isaacs