Any opinions out there regarding the best kind of coolant to use in these old cast iron engines, IAT, OAT, or HOAT?
Should it contain silicate or not? From what I've read, some coolants contain silicate, and some don't. I'm not even sure why silicate is added. One of my textbooks says that silicates can cause extra wear on water pump impellers although my B3B won't be driven that much anyway.