How To Do A Compression and Leak Down Test | What is the difference?

Repair Geek • January 31, 2025
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My channel is dedicated to making repairs, modifications, or testing anything automotive related. That may be a car, truck, shop equipment, products or tools. I will only produce a video if I feel that it is of some use. I really strive to make my content as clear and concise as possible. I truly want you guys to be able to replicate what I am doing in my videos after watching them. I may only produce a video every few weeks or perhaps more constantly. It all depends on what I have going on in the shop and at home. Thanks for stopping guys and if you're interested hit subscribe -Repair Geek

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The Secret to Finding Out Your Engine's Health FAST ( Compression vs Leak Down Testing ) Want to know if your engine is running at peak performance or hiding costly issues? In this video, I reveal the secrets to quickly diagnosing your engine's health using **compression testing** and **leak down testing**. These essential tests can help you pinpoint problems like worn piston rings, bad valves, and head gasket failures before they lead to expensive repairs. 🔧 **What You'll Learn:** - The difference between compression and leak down testing - How to perform both tests safely and accurately - What your results actually mean for your engine Whether you're troubleshooting a rough idle, low power, or just curious about your engine’s condition, this guide will help you diagnose like a pro. 👉 Don’t forget to **LIKE**, **SUBSCRIBE**, and **TURN ON NOTIFICATIONS** for more practical automotive content! Tools used in this video: Compression Tester: https://amzn.to/4hlwvV2 Leak Down Tester: https://amzn.to/4aG0jcr Automotive Smoke Machine: https://amzn.to/3CuJuEu Spark Plug Sockets: https://amzn.to/3PWKXXq My Amazon Store: https://www.amazon.com/shop/repairgeek Help support the channel, buy using my Amazon links As an Amazon Associate I earn from qualifying purchases and your cost is exactly the same. I source all of my service data from the same place that professional shops do. You can as well: https://www.pntrac.com/t/SENKSUZKRktDSEpOTEtGQ0dKRk9LTw Questions? Shoot me an email at [email protected] #CompressionTest #LeakDownTest #EngineDiagnostics #DIYMechanic 00:00 Intro 00:04 Why am I doing a compression/leak down test? 1:03 What these tests measure. 4:32 Test kits that I recommend. 5:52 Warming up the vehicle/spark plug removal 7:17 Conducting a compression test. 12:28 Compression Testing vs Leak Down Testing. 14:34 Conducting a leak down test 18:48 Diagnosing cylinder leakage 22:08 Is this engine healthy? 24:18 Leak down testing with a smoke machine 25:08 Outro Disclaimer: The information, demonstration and any content contained in this video is for informational purposes only. The user Repair Geek makes no warranty, express or implied, regarding the effectiveness or safety of the contents of this video. In no way should the contents of the video, including the tools used, be repeated or tried by anyone. Viewers should only seek the help of a trained professional located at a licensed auto repair shop for any fix, modification, alteration, or any change to their vehicle. Repair Geek shall not be liable for any injury, damage, or loss to any person or property that may result from use of the tools, equipment, or any content contained in this video. In addition, there is no way to guarantee that the video is not altered or modified or is not in the final form submitted by Repair Geek and therefore, Repair Geek does not warrant that the video is unaltered or not modified. The links on this video to products are for informational purposes only and in no way are an endorsement of the safety or effectiveness of the particular product. Viewers understand that anything contained in this video or linked to or from this video is the sole responsibility of the viewer and in no way provides an express or implied warranty as to the safety or effectiveness of any linked tool, product, or video. Therefore, viewer agrees to release, waive, and discharge Repair Geek or anyone affiliated with Repair Geek, from any and all liability, claims, demands, actions, and causes of action whatsoever arising out of or related to any loss, damage, or injury, including death, that may be sustained by the viewer, or to any property belonging to viewer, regardless of whether the loss is linked to the use of the contents of this video, or otherwise and regardless of whether such liability arises in tort, contract, strict liability, or otherwise, to the fullest extent allowed by law.

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