Performing a leak test on your vehicle’s cooling system is a essential step in protecting your engine from catastrophic failure. Over time, rubber hoses, head gaskets, and the radiator unit can develop weak spots that allow coolant to leak out. Identifying these leaks early can save you hundreds down the road. Begin by ensuring your vehicle is on flat ground and that the engine is completely cooled. Do not open the radiator cap or coolant reservoir while the engine is hot, as the built-up pressure and heat can cause life-threatening scalding.
Once the engine has cooled, visually inspect all components of the cooling system. Look for wet spots, crusty white or greenish residue, or liquid accumulation on the ground. Inspect meticulously the radiator, coolant lines and clamps, coolant pump and seal, interior HVAC lines, and the radiator cap. Small leaks can be nearly invisible, so clean every surface with a lint-free cloth and look for fresh moisture after a 5 to 10 minutes.
Next, you’ll need a coolant pressure tester. These low-cost tools are easily found at nearby mechanic shops. Remove the coolant cap and connect the pressure tester according to the manufacturer’s instructions. Most vehicles require a pressure setting of 15 psi ±3. Check your owner’s manual for the manufacturer-specified pressure. Pressurize the tester to the target psi and keep it pressurized for a minimum of 10 minutes. Observe the reading continuously. If the pressure decreases, you have a escape point somewhere in the system.
If the pressure stays stable, your system is likely sealed. If the pressure drops unexpectedly, you’ll need to locate the source. Recheck all hoses and connections for wet indicators. You may also notice a subtle air leak if the leak is minor. If the leak remains invisible to the eye, introduce UV-sensitive tracer into the coolant and employ a blacklight to reveal it. Some leaks, لوازم یدکی چری تیگو 7 پرو such as a compromised cylinder head seal or a fractured engine casting, may need specialized tools.
If you suspect an hidden coolant breach, such as coolant entering the oil passages or being burned in the cylinders, check the oil dipstick for a creamy texture or watch the tailpipe for excessive condensation. These are clear signs of major mechanical failure that require immediate attention.
After the test, carefully release the pressure from the system and uninstall the tester. Refill the coolant to the manufacturer-recommended mark using the specified coolant recommended by your vehicle’s manufacturer. Always dispose of old coolant properly, as it is dangerous to pets and the environment.
Scheduled evaluation your cooling system, especially prior to road trips, can help avoid unexpected breakdowns. Even if no leak is found, it’s a good idea to change the coolant at factory intervals. Keeping your cooling system in proper working order ensures your engine operates at peak performance and reduces long-term wear.