When your car is running, coolant cycles through the engine, into the heater core and then back to the radiator for cooling. The coolant is transfered through the system with rubber hoses that over time become weak and can begin leaking. The best way to determine the exact location of a coolant leak is to pressure test the system. This process simulates the pressure created by the engine during operation.
Instructions
- 1
Lift the front end of the car into the are with the floor jack. Place the jack stands under the frame rails of the vehicle and lower the floor jack until the vehicle rests securely on the jack stands. Shake the vehicle to ensure proper placement of the jack stands.
2Put on the safety glasses. Ensure the engine is completely cool and remove the radiator cap. Visually inspect and ensure there is coolant in the radiator. Check the top of the radiator cap and note the pressure listed on the sticker.
3Place the coolant system pressure tester over the opening in the radiator and secure it with the hardware included with the tester. Ensure the tester is placed properly to prevent air from escaping the opening when pressure is applied.
4Pump the pressure tester until the needle gauge reads the pressure listed on the radiator cap sticker. Listen for any hissing sound and look for and drips under the vehicle. If there is no hissing sound or drips then the system is likely free of leaks.
5Remove the pressure tester and lower the vehicle back to the ground. Replace the radiator cap. Pay attention to ensure the arrow on the cap points towards the over flow outlet and the radiator neck.
