Originally Posted by DeenHylton

Metal freeze plugs are always the best way to go, but if your trying to make an "in the truck repair" sometimes a rubber plug is the way to go if you don't have room to hammer in a metal one. I've had two different engines that I've installed rubber plugs and never had one blow out. Just make sure you install them dry...and when you finally pull the engine for a rebuild replace the rubber with metal. Deen