* Block Heater: This is a common type of heater for cold-weather starting. It's an electric heating element screwed into a threaded port in the engine block. The location varies greatly between engines. You'll typically find it near the bottom of the engine block, sometimes on the side, and it may have a cord that extends outward.
* Fuel Line Heater: Some diesel systems incorporate electric heating elements around the fuel filter or fuel lines to prevent fuel gelling in extremely cold temperatures. These are usually integrated into the fuel system itself and aren't externally accessible as a "plug."
* Cranking Heater (Glow Plugs): While not exactly a "heater plug" in the sense of warming the engine block directly, these are essential for starting cold diesel engines. They are embedded in the combustion chambers and preheat the air for easier ignition. These are internal components and not something you would plug in externally.
* Auxiliary Cab Heaters: In larger vehicles or equipment, there might be a separate auxiliary heater (often diesel-fired) to heat the cab. This might have its own power cord and plug, but its location would be in the cab, not on the engine itself.
To find the heating plug (if applicable) for *your* diesel engine, you need to:
1. Consult your owner's manual: This is the best resource. It will show you exactly where the block heater (if equipped) is located and how to plug it in.
2. Look around the engine block: If you don't have an owner's manual, carefully inspect the engine block, especially near the bottom. Look for a threaded port with a cord extending from it – this is likely the block heater. Be cautious around hot components! Ensure the engine is cool before attempting to locate the heater.
3. Check the front or rear of the engine: Sometimes the cord exits near the front or rear, rather than directly on the side.
Without knowing the specific make, model, and year of your diesel engine, it's impossible to give you a precise location.
