However, it could also be a number of other things, including:
* Radiator itself: A leak in the radiator, particularly near the lower hose connection, would be a common cause.
* Lower radiator hose: The hose itself could be cracked or perished.
* Water pump: A leak in the water pump seal is another possibility.
* Hoses connected to the engine: Other smaller hoses within the engine compartment could have a leak that runs down to that point.
To properly diagnose the leak, you'll need to:
1. Thoroughly clean the area: This will help you see where the leak is actually originating.
2. Inspect all components: Carefully examine the water pump, radiator, hoses, and any visible water tubes for cracks, corrosion, or other signs of leakage.
3. Pressure test the cooling system: This is the most reliable way to pinpoint the source of a leak. A mechanic can do this quickly.
Don't ignore the leak. Driving with a low coolant level can cause serious engine damage, including overheating and potentially a blown head gasket. Get it checked by a mechanic as soon as possible.