* On the sides of the engine block: These are the most common locations. You'll find them towards the bottom, often near the cylinder bores. There will typically be several on each side.
* On the front and/or back of the engine block: It's less common, but some freeze plugs might also be located on the front or rear of the block.
You will need to visually inspect the engine block to locate them precisely. A shop manual for your specific year and engine is highly recommended as it will provide diagrams showing the exact locations of all freeze plugs. A service manual can be found online or at auto parts stores. Searching for "2001 Dodge Ram 1500 5.2L engine diagram" or "2001 Dodge Ram 1500 5.2L freeze plug locations" with images will also be helpful.
Remember to be careful when working around the engine block; it's hot when the engine is running and has sharp edges.