How to perform a compression test on an engine to assess it's mechanical condition. An engines ability to compress air and fuel is directly proportional to it's performance since an engine is nothing more than an air compressor once you take away all the controls. A compression test is a good general test that will give you an idea of the engine's overall health and the condition of the rings, seat, valves and intake and exhaust valve. If you find yourself looking for the source of a performance problem with an engine, this is a great place to start. This test is often overlooked in favor of looking at the fuel or ignition system, I think that's a mistake, if an engine can't perform mechanically no amount of electronics will make that better. Eric the Car Guy performing a compression test: https://youtu.be/X_tbksFYhl4 Music by: Randall Kent All Rights Reserved 2015 © Copyright 2015 Bundys Garage DISCLAIMER - DISCLAIMER - DISCLAIMER Due to factors beyond the control of BundysGarage, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. BundysGarage assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. BundysGarage 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 BundysGarage, 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 BundysGarage.