The engine block heater is located under the exhaust manifold in place of an engine freeze plug. Allow the engine to cool, drain the antifreeze into a suitable container and position the pan under the block heater. Loosen the retaining bolt and remove the heater from the engine.
Clean the mounting surface, apply sealer to the heater, install the heater and tighten the retaining bolt.
To engine freeze plug can be removed by drilling an 3mm ( 1 / 8 in.) hole and thread a body dent puller into the hole and pull outward. An alternative is to drive a prybar into the lower edge of the plug and pull through the hole. When installing the plug, coat the outer edge with sealer and drive the plug in with a socket that fits inside the lip and a hammer.