RECALLED GM L87 6.2L ENGINE TEARDOWN! Manufacturing Defect Causes INSANE Damage

Video Description

For parts visit www.Importapart.com or email us at [email protected] For other I Do Cars content check out my wife's channel at https://www.youtube.com/@TheCarWifeLife Every week I post a new teardown video of a blown up or suspected bad engine. Check out a few of my favorites! GM 5.3L L84 Teardown, WILD Failure! https://youtu.be/kIZCMS0qONI DEAD GM LM2 3.0 Duramax at 45K Miles! https://youtu.be/6C6xgZs9uUs 415,000 Mile Toyota 2JZ Engine Teardown https://youtu.be/n7MSlbAhiBc Complicated Disaster 560hp BMW M5 V8 Teardown https://youtu.be/zKD5ubZ4Hvc Today we have a very special engine on the stand. This is the 6.2L GM L87 V8 from a 2022 GMC Yukon Denali. This is the RECALLED engine unlike the previous L87 I tore down. The Denali currently has 95k miles or did as of a month ago, but this engine was replaced quite some time ago. A dive into its past reveals a lifter replacement under warranty but no mention of replacement which means this engine had failed outside of warranty. This engine has damage we have NEVER seen before on this channel. The widespread component failures in multiple systems shows this was not a case of neglect, abuse or improper care but more likely an incorrectly machined or spec'd part. In April, GM announced a recall for all 21-24 L87 powered vehicles for potential engine failure resulting is loss of brake assist. The cause for this recall is suspected to be a crankshaft machining error, and some of the temporary fixes include running a heavier weight oil, such as 0w-40 which is the same oil the corvette and Camaro use(and those don't have these problems). The problem likely lies with a surface finish of the journals and the recommended 0w-20 does not give enough protection for the improper machining tolerances which is why if an engine meets the requirements for such, one temporary fix is to use the 0w-40. Eventually, these engines may all need replacing. This will cost GM far more than any CAFE standard penalty would have ever. Why am I doing this? My name is Eric and I own and run Importapart, a full service auto dismantling business. Part of our model includes buying blown up and bad engines to dismantle for parts. We salvage the good, sellable parts and recycle rest. No, we don't rebuild engines but we do sell parts to people who do! As always I hope you enjoyed this video. I love all of the comments, feedback and even the criticism. Catch you on the next one! -Eric 00:00 Intro 04:06 Removing the spark plugs and inspecting 04:46 Unbolting the intake manifold and inspecting intake ports. Putting the DI in DIRTY 06:23 Peeling off the LH Valve cover. Pretty clean! 07:12 Cracking the rocker arms loose, and inspecting rockers and pushrods. Problems already! 08:24 Unbolting the cylinder head 09:29 SCIENCE! And inspecting pistons, bores and cylinder head 10:28 Unbolting the RH Valve cover, cracking rocker arms loose and inspecting valvetrain 12:39 Cracking the RH Cylinder head bolts loose and lifting the head 13:48 SCIENCE! 15:02 Stripping the top of the engine, HPFP, Valley cover and DFM solenoids 17:08 Pulling the trays and lifters and FAILURE #2? SHEESH 20:18 Unbolting the oil pan and THE MONEY SHOT 21:10 HOW DOES IT GET SO BAD? How does it run long enough!? 22:00 Removing the harmonic balancer and front timing cover 22:52 Oil pump removal, dismantling and inspection 24:34 Removing the VVT Cam gear, timing chain, cam plate and camshaft 25:27 Camshaft inspection. Yikes 26:12 Unbolting and pushing out the first two rods and pistons 28:00 YIKES EVERYWHERE 30:32 Unbolting and pushing out the last two rods and pistons 32:07 Pulling the main caps 35:10 Plucking the crankshaft out of the block, and removing EVERY bearing stuck to it. 37:49 Complete rotating assembly inspection. Crankshaft, bearings, rings, rods, pistons, block. SO MUCH DAMAGE IN SO MANY PLACES! Unbelievable. 45:56 Summary & Thoughts on this failure/recall