/// Metal replacement freeze plugs simply require space to tap the correct sized plug in to the hole. If the placement of the hole is such that you cannot get to it to tap it in there are rubber sealed plugs with a bolt in the center to expand the rubber gasket.

Why not first try to tightnen the bolt holding in your plug? Yes replacing a freeze plug is easy but first the old one has to come out. Then the hole needs to be clean and last you need room to swing a hammer. I would look at replacing the rubber sealing washer and reusing the heater plug. I think that would be easier then using an all metal plug.

Bill D.

New freeze plugs should be available at your dealer for cheap.