* Radiator: This is usually a large, capped opening on the top of the radiator itself. It's often clearly marked with a "Coolant" or similar label. This is generally the preferred method for adding coolant.
* Overflow Tank (Surge Tank): This is a smaller reservoir connected to the radiator. It catches excess coolant when the engine is hot and helps maintain system pressure. You can add coolant here, but it's generally better to add it to the radiator directly to ensure proper air bleeding.
Important Considerations:
* Engine Temperature: Always let the engine cool completely before adding coolant. Hot coolant can cause serious burns.
* Type of Coolant: Use the correct type of coolant recommended for your 1999 Ford Ranger. Consult your owner's manual for the specific recommendation (typically a 50/50 mix of coolant and distilled water). Using the wrong coolant can damage your engine.
* Proper Mixing: If you're adding coolant, make sure to mix it with distilled water according to the manufacturer's instructions. Using tap water can lead to mineral deposits and corrosion in your cooling system.
* Cleanliness: Keep the area around the fill necks clean to prevent dirt or debris from contaminating the coolant.
If you're unsure about any of these steps, consult your owner's manual or a qualified mechanic.
