How to top up your coolant
Peter Sitkowski | 14th Feb 2024 | 5 minutes to read
Maintaining the coolant levels in a vehicle's engine helps regulate engine temperature and prevents overheating, ensuring your engine runs smoothly, especially on hot days.
Engine temperature regulation is a major factor in an engine’s performance and regular maintenance of coolant levels contributes significantly to a vehicle's longevity and efficiency, making it an essential aspect of vehicle care.
Topping up coolant is a simple procedure that can be performed at home, below are the basic steps:
Tools for the Job
- Rags
- Gloves
- Safety Goggles
- Appropriate coolant for your vehicle
Prepare the Vehicle
Start by parking the vehicle on a flat surface with the handbrake engaged.
Ensure the engine is cool before opening the radiator or coolant reservoir cap. If your car has been running, make sure to allow the engine to cool down completely before attempting to top up your coolant, as a heated coolant reservoir can release boiling liquid and cause severe burns.
Locate the Radiator or Coolant Reservoir
Depending on the vehicle's make and model, locate either the radiator cap or the coolant reservoir. The radiator cap is usually located on top of the radiator, while the reservoir is a translucent plastic tank near the engine.
Check Coolant Level
Inspect the coolant level by looking at the markings on the side of the reservoir. If the coolant level is below the recommended "Full" or "Max" line, topping up is necessary.
Prepare Coolant Mixture
Refer to the vehicle manual or coolant product instructions for the appropriate coolant type and mixing ratios. Some coolants come pre-mixed, while others require dilution with water. Ensure the coolant used is compatible with the vehicle's requirements.
Open Radiator Cap or Coolant Reservoir
If topping up at the radiator, carefully unscrew the radiator cap after the engine has cooled down. Alternatively, if topping up at the reservoir, open the cap by turning it counterclockwise. Use a rag to protect your hand while opening the cap, as residual pressure may cause hot coolant to splash.
Add Coolant
Slowly pour the coolant mixture into the radiator or reservoir until the level reaches the "Full" or "Max" mark. Avoid overfilling, as excess coolant may spill when the engine heats up.
Check for Air Bubbles
After topping up, gently squeeze the radiator hoses or tap the reservoir to help release any trapped air bubbles. This ensures proper coolant circulation within the system.
Finishing Up
Once the coolant is added, securely tighten the radiator cap or reservoir cap to prevent leaks or coolant loss. Dispose of any excess coolant in a safe and environmentally friendly manner, as it is toxic and harmful to the environment and animals.
Check online for the location of your local household hazardous waste disposal site, otherwise certain service stations will often take old coolant off your hands.
You’ll want to regularly monitor the coolant level over the next few days to ensure it remains at the recommended level and recheck for any leaks or irregularities in the cooling system.
Coolant & Engine Fluids at Repco
Repco has a massive selection of engine oils, coolant, and other fluids like degreasers and additives. We’ve also got cooling fans, radiators, and thermostats if you’re in need of cooling parts for your next DIY job.
