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

For parts visit www.Importapart.com or email us at Sales@Importapart.com

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