What is the recommended action if you suspect a coolant leak in the cooling system?

• A. Inspect for leaks and repair, monitor coolant levels.
• B. Ignore and run at higher speed.
• C. Only replace radiator cap.
• D. Increase coolant concentration to maximum.

Answer: (A)

When you suspect a coolant leak, the priority is to locate and repair the leak and keep the coolant level in the proper range. Leaks reduce cooling capacity and can cause the engine to overheat, which can lead to serious damage like warped heads or blown gaskets. Start with a thorough visual check of hoses, clamps, the radiator, radiator cap, water pump, and heater core for signs of dampness, crusty residues, or puddles after the system has cooled. If the source isn’t obvious, use a cooling-system pressure test to pinpoint the leak. Once you find the leak, repair or replace the faulty part and restore the coolant to the correct level using the proper type. After repairs, monitor the level to ensure there’s no further loss and bleed the system if required. Driving with a suspected leak is risky, and simply replacing the radiator cap or cranking up the coolant concentration won’t fix the underlying problem and can cause other issues.