It should be located on the driver side of the block near the rear of the block behind the exhaust manifold and about 1/2 way vertically up the block.
it could be a bad thermostat or lack of water/coolant in the engine itself. Coolant will boil itself away if it was not mixed right. If the thermostat is sticking or not working, it wont let coolant that is in the block move past the radiator to cool, allowing the temperature of the block to increase and over heat Thermostat not opening?
Kind of. There are water jackets inside the engine block and usually the heads of a liquid-cooled engine Water (or coolant) will either flow from the block to the head to the radiator, or from the radiator through the head to the block (a reverse flow design). The latter is better because it cools the heads first and helps prevent detonation. It also reduces thermal shock to the engine block.
yes in a way. block heaters heat the coolant in the block there for warming the block up. coolant heaters heat the coolant out side the engine like in the hoses and radiater. and when the coolant gets hot enough it opens the thermosate and starts flowing through the engine..The coolant heater should be hooked into the engine so that it heats only the engine and the heater core. If the coolant heater is trying to heat the radiator then it will not work very well to heat the engine, you would need a lot of BTUs to heat the radiator as it will shed all that heat to the air that is surrounding it.