freeze plug leaking

To replace the freeze plug, disconnect the battery first. Next, you will need to drain the coolant from the system (unless it has already all leaked out). Take a screw driver or punch and tap it through the old freeze plug and pry it out of the engine block. Clean any corrosion from the engine block where the new plug is to be replaced. Now you have two options. First, the standard steel freeze plug will simply tap back into place. What I do is this. If you have enough room, take a small block of wood, center the freeze plug in the engine block, cover it with the wood and tap it into the engine block until is fully pressed into place. If you have little room and can not get the tools needed into place, they make a rubber replacement. Basically, it is a rubber plug with an interal steel plate that is attached to a bolt and nut on the outside. The rubber end pushes into the engine block and when you tighten the nut, it expands and seals the block. They are much easier to install because of room restrictions. Either way, both will work for you.