Checking your radiator involves visually inspecting the coolant level and the condition of the radiator components. Here's a breakdown of how to do it:
1. Safety First!
- Wait for the Engine to Cool Down: Never check your radiator while the engine is hot. The coolant system is pressurized, and opening it when hot can cause severe burns from spraying hot coolant. Wait at least 30 minutes after the engine has been turned off.
- Wear Gloves: Coolant can be harmful if it comes into contact with your skin.
2. Locate the Radiator and Surge Tank/Coolant Reservoir
- Radiator Cap: The radiator cap is usually located directly on the radiator itself.
- Surge Tank/Coolant Reservoir: Many modern cars have a separate plastic reservoir connected to the radiator with a hose. This is called the surge tank or coolant reservoir. This tank allows you to check the coolant level without opening the radiator cap.
3. Check the Coolant Level
- Surge Tank/Coolant Reservoir: Look for "Min" and "Max" or "Cold" and "Hot" fill lines on the tank. The coolant level should be between these lines when the engine is cold. According to the video reference, the coolant level should be at or slightly above the indicated line on the surge tank.
- Radiator Cap (If No Surge Tank): If your car doesn't have a surge tank, carefully remove the radiator cap (only when the engine is completely cool!). The coolant should be visible just below the cap.
4. Inspect the Coolant
- Color: Coolant is typically green, blue, orange, or yellow. Brown or rusty coolant indicates rust and corrosion and suggests you need to flush and refill the system.
- Debris: Look for any floating debris or sediment in the coolant. This can also indicate a problem.
5. Inspect the Radiator Components
- Hoses: Check the radiator hoses for cracks, leaks, or swelling. Squeeze them gently to check for brittleness. Replace any damaged hoses.
- Radiator Fins: Inspect the radiator fins for damage or blockage from debris (leaves, bugs, etc.). Gently straighten any bent fins.
What to do if the Coolant is Low
If the coolant level is low, add the correct type of coolant to bring it up to the proper level. Refer to your owner's manual to determine the correct coolant type for your vehicle. It's best to use a 50/50 mix of coolant and distilled water. If you frequently need to add coolant, there may be a leak in the system, and you should have it inspected by a mechanic.