What Causes a Spun Bearing in an Engine?

What is a spun bearing? Can you drive on a spun bearing? You can have a spun rod bearing or a spun crank bearing and when they fail, it sometimes destroys the engine like in our Lemons BMW. In this video I show you how to diagnose a spun bearing and possible causes. We disassembled the entire engine, every single nut and bolt, so you guys can see what causes an engine to throw a connecting rod and fail. Our Backup Race Engine Being Built: https://youtu.be/f8Z4OSrI59s Stainless Steel Headers: https://ebay.us/3OphJl Chain Tensioner: https://amzn.to/3J5S7Uf Timing Chain Cover Gasket: https://advanceautoparts.rt8x.net/4eMymL Picking our Endurance Race Car: https://youtu.be/_U5XcrifRjQ How to Replace Power Steering Pump: https://youtu.be/04iDF3I6dTo Complete Weight Reduction Episode: https://youtu.be/MCiNGmwopx4 What Happened to the Lemons BMW: https://youtu.be/IbPhor1mnCA My FIRST Wheel to Wheel Endurance Race: https://youtu.be/_vrICr6iNGI How to Install a Quick Release Steering Wheel: https://youtu.be/bIGDhqY6KpE Completing my First 24hr Endurance Race: https://www.youtube.com/watch?v=ZZxnDCJTOxs 0:00 How the engine failed 1:25 Installing the junkyard M54 engine 3:14 Stainless steel long tube headers 5:13 Backup BMW motor being built 6:44 What caused the motor to fail 10:20 What is a spun bearing 13:43 What causes a spun bearing 15:17 Oil analysis 18:17 Race car livery → As an Amazon Associate I earn from qualifying purchases. → Become a ChrisFix Subscriber: http://www.youtube.com/subscription_center?add_user=paintballoo7 → Instagram: https://www.instagram.com/chrisfixit → Facebook: https://www.facebook.com/chrisfix8 → Website: http://www.ChrisFixed.com → My Channel Home Page: https://www.youtube.com/ChrisFix **If the video was helpful, remember to give it a "thumbs up" and consider subscribing.** Disclaimer: Due to factors beyond the control of ChrisFix, I cannot guarantee against improper use or unauthorized modifications of this information. ChrisFix assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. ChrisFix recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of ChrisFix, no information contained in this video shall create any expressed 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 from the information contained in this video is the sole responsibility of the user and not ChrisFix.