This is another in my series of 'The Basics'. If you run into an overheat issue on your vehicle, and you suspect a leak, this is the best way to find it. Putting pressure on the system will cause it to leak and reveal the leaks location in the process. Just a couple of things to remember. Make sure the coolant is topped off before you start the test. If not, then it will take a lot longer to build up pressure. Also, if you have an overheat condition, start by bleeding the air out of the cooling system. In my experience, this is the most common cause of an overheat. The next step is to figure out how the air got there in the first place. Here's some useful links for you that I mentioned in the video.Link to Radiator Replacement Video: https://www.youtube.com/watch?v=REIIwYaKQDYPressure Tester (expensive): http://www.jbtoolsales.com/mityvac-mv4530-cooling-system-pressure-test-kit/#oid=1002_1Pressure Tester (less expensive): http://www.jbtoolsales.com/mityvac-mv4560-radiator-cooling-system-pressure-test-kit/#oid=1002_1How To Bleed a Cooling System: http://www.youtube.com/watch?v=zUpXgAJ1gjUDiagnosing an Overheat Condition: http://www.youtube.com/watch?v=hUzOTnsWImIArticle on Diagnosing Overheats: http://www.ericthecarguy.com/faq/what-to-do-when-your-engine-overheatsETCG FAQ page: http://www.ericthecarguy.com/faqDiscussion about this video: http://www.ericthecarguy.com/kunena/18-The-EricTheCarGuy-Video-Forum/49461-pressure-testing-cooling-systems#87689The best place for answers to your automotive questions: http://www.ericthecarguy.comFacebook: https://www.facebook.com/EricTheCarGuy?fref=tsTwitter: https://twitter.com/EricTheCarGuyGoogle+: https://plus.google.com/100195180196698058780/postsInformation on Premium Membership: https://www.ericthecarguy.com/premium-content-streaming-etcg-contentStay DirtyETCGDue to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information.  EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video.  Due to factors beyond the control of EricTheCarGuy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result.  Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not EricTheCarGuy.