This debate is debatable. I once had a 73 Nova SS in northern Florida while I was in the Navy. I bought it from another sailor and it had just water in the system. During the winter (yes it gets below freezing there at times), it popped a side freeze plug. That's what I was always told they were and the freezing temps told me why and felt it did it's job. I ended up putting in a rubber style you tighten the fastener to expand the rubber to seal. Anti freeze coolant after that!
|