1. Keep the engine from overheating

• Moves coolant through hot engine parts to absorb heat
• Prevents damage from excessive temperatures

2. Maintain stable operating temperature

• Keeps the engine at an optimal temperature for performance and efficiency

3. Enable heat transfer

• Carries heat from the engine to the radiator, where it’s released into the air

4. Protect engine components

• Prevents warping, cracking, or failure of parts like the cylinder head and gaskets

5. Support overall engine efficiency

• Proper temperature control improves fuel efficiency and reduces wear

1. Coolant leaks

• Puddles under the front of the vehicle
• Drips from the pump area (often from a “weep hole”)
• Sweet smell of coolant

2. Engine overheating

• Temperature gauge rising higher than normal
• Overheating warning light
• One of the most serious signs

3. Whining or grinding noise

• Caused by worn bearings inside the pump
• Noise usually comes from the front of the engine

4. Steam from the engine bay

• Coolant not circulating properly → overheating → steam

5. Low coolant level

• Constant need to top off coolant
• Often tied to leaks

6. Rust or corrosion on the pump

• Visible buildup or damage on the pump housing
• Can lead to failure over time

7. Heater not working properly

• Weak or no heat inside the cabin
• Caused by poor coolant circulation