Overheating is one of the most common causes of car breakdowns in Nigeria. It’s not just because of traffic or bad roads—most times, it comes down to something as basic as low coolant. In a country where temperatures often soar past 35°C and vehicles sit in bumper-to-bumper traffic, checking coolant levels isn’t just routine—it’s essential.
Whether you’re a first-time car owner or a seasoned driver looking to avoid a costly engine replacement, this guide will help you understand how to check your coolant levels, why it matters in Nigeria’s climate, and what to do if something seems off.
Coolant Level Check. Source: Auto Repair Indy
Why Coolant Matters in Nigeria
Coolant (also called antifreeze) prevents your engine from overheating. It absorbs heat, regulates temperature, and stops corrosion in the engine block. In cooler countries, coolant also prevents freezing, but in Nigeria, the focus is on preventing overheating. With Nigeria’s tropical weather, the heat doesn’t just stress you—it stresses your engine too.
A well-maintained cooling system means fewer breakdowns and better fuel efficiency. As noted in our feature on how Nigerians often overlook basic car care, skipping these “small things” leads to big repair bills.
When Should You Check Your Coolant?
Always check your coolant when the engine is cool. This means turning off your car and waiting at least 30 minutes. Checking it while the engine is hot is dangerous—coolant is pressurised and can spray out, causing serious burns.
Most experts suggest checking coolant every few weeks, but in Nigeria’s climate, we recommend doing it at least once a month, and more frequently during dry season when evaporation is higher.
Step-by-Step: How to Check Coolant Levels
Checking coolant levels is easy and doesn’t require any tools.
- Park on a level surface and turn off the engine.
- Wait for the engine to cool—30 minutes minimum.
- Locate the coolant reservoir. It’s a translucent plastic tank near the radiator, with “MIN” and “MAX” lines.
- Check the level. If coolant is between the lines, you’re fine. If below “MIN,” top it up.
- Top it up properly. Use a 50/50 mix of glycol-based coolant and distilled water.
Refer to your car’s manual for specific coolant types. Using the wrong one can damage your system over time.
You can also watch this YouTube guide or this video for a visual demonstration.
Why Distilled Water Matters
Distilled Water in My Radiator. Source: Cars from Japan
Tap water in Nigeria often contains minerals that build up in the cooling system. Over time, this leads to blockages, rust, and even radiator failure. Distilled water prevents that by keeping the system clean. If you ever wondered why some cars overheat even when the radiator is full, this might be the reason.
For more practical car care tips like this, check out our piece on how to decode Nigerian number plates—a useful read if you’re buying or registering a used car.
What If Your Coolant is Low?
Top up with a 50/50 mix of coolant and distilled water. Use a funnel and pour slowly. Don’t overfill it—just to the “MAX” line. If your coolant drops again within a week, you might have a leak.
Common Signs of a Leak:
- A sweet smell around the engine bay
- Puddles under the car
- White smoke from the exhaust
- Constantly dropping coolant level
If you notice any of these, take the car to a mechanic immediately. It could be a leaking radiator, cracked hose, or blown head gasket.
How Nigeria’s Climate Affects Coolant Use
Nigeria’s hot weather accelerates coolant evaporation. In places like Lagos, Abuja, and Port Harcourt, cars spend a lot of time idling in traffic. The longer your engine runs, the more heat it generates—and the harder your cooling system works.
According to Prestone and M&M Tire & Service Center, hot weather increases the load on your radiator and reduces the efficiency of coolant. That’s why using a high-quality, glycol-based coolant with a high boiling point is important.
In fact, the Valvoline Global Europe guide confirms that hot climates demand more frequent checks and a higher quality coolant mix.
Coolant vs. Water: Which Is Better in Nigeria?
You may have heard that “water alone is fine in Nigeria since we don’t get snow.” That’s a myth. Water boils faster, lacks corrosion inhibitors, and causes scaling when mixed with hard water.
According to Machinery Lubrication, glycol-based coolant offers better protection even in hot climates. It raises the boiling point and adds anti-rust properties. Bottom line: always mix coolant with distilled water—never use plain water.
How Often Should You Flush Your Coolant?
Most manufacturers recommend a full coolant flush every 2–3 years. But in Nigeria, where engines work harder due to high heat, every 18–24 months is safer.
A full flush removes rust, scale, and sludge that builds up over time. Think of it as an oil change for your radiator.
Quick Checklist for Nigerian Drivers
| Task | Frequency | Notes |
| Check coolant level | Monthly | More often during dry season |
| Use distilled water | Always | Prevents mineral buildup |
| Top up with 50/50 mix | When below MIN | Glycol-based coolant only |
| Flush system | Every 18–24 months | Don’t skip this |
| Inspect for leaks | Bi-monthly | Early detection saves engines |
For more ways to protect your vehicle in tough conditions, read our guide on getting the most out of your engine.
Signs You May Be Overdue for Coolant Maintenance
- Engine temperature gauge rises quickly
- Coolant appears rusty or muddy
- Steam from under the hood
- Heater doesn’t work properly
If you’ve experienced any of these, it’s time to act. You might also consider having your cooling system professionally pressure-tested.
In some extreme cases, poorly maintained systems can damage your engine so badly that repairs cost more than the car. Don’t let it get there.
Trusted Help: Where to Go in Nigeria
For professional service, places like Cummins West Africa (8 Ijora Causeway, Lagos) are equipped for detailed inspections. If you suspect a deep issue—like a head gasket or radiator fault—don’t delay.
Radiator Leaks. Source: Willspart
Also, be wary of road-side quick fixes. Temporary patches might stop a leak today but could lead to major issues later.
Need a list of things every Nigerian car owner should have on hand? Check out our post on essential documents for Nigerian car owners.
Conclusion
Checking your coolant levels isn’t just a good habit—it’s a necessary one, especially in Nigeria’s climate. Follow the right procedure: wait for the engine to cool, locate the reservoir, check the level, and top up with a proper mix.
Don’t rely on outdated advice like using plain water. Use the right coolant, mix it correctly, and check regularly. Your car engine—and your wallet—will thank you.
As with most car maintenance in Nigeria, being proactive is cheaper than dealing with a breakdown. For more insight into avoiding major car disasters, read our breakdown of 5 signs a Nigerian used car isn’t for you.
