How to Perform an Automotive Engine Cooling System Pressure Test

how to pressure test an automtive engine radiator cooling system

Introduction

Conclusion

Once the desired pressure is reached, monitor the gauge on the pressure tester. The pressure should remain stable for at least 10–15 minutes. A drop in pressure indicates a leak somewhere in the system. Your pressure tester should have an adapter to test the radiator cap as well which is a good idea to keep the engine from overheating.

Watch the Video!

Please watch this video of the job being done to glean additional helpful information.

Credits

This guide knowledge base was created by the 2CarPros Team, with contributions from Ken Lavacot, an automotive repair contributor with over 30 years of hands-on repair experience. If you have a question or need help, please ask the 2CarPros community and an automotive repair contributor may be able to assist. Please visit our 2CarPros YouTube Channel.

Repair Safety Notice: This guide is provided for general informational and educational purposes only. Vehicle repairs can involve risk of injury, property damage, or vehicle damage. Always follow proper safety procedures, use the correct tools, support the vehicle securely when raised, and consult a qualified automotive repair professional if you are unsure about any step.