Okay, as a longtime data geek and mechanical moron, this video had me enthralled. What was it all about? Some guys asking themselves “Why?”
This brand new L87 engine with ZERO miles never even made it into a vehicle before it was condemned by GM. It failed one of their quality control Pico tests and we want to know why. In this video, we tear it down, take some measurements, and run tests to uncover why it was tossed in the trash — and how this single engine design ended up costing GM over a billion dollars in recalls and warranty repairs.
I don’t have the faintest clue what any of the technical pieces or terms are all about, but the search is absolutely thrilling. It’s when these mechanics start looking at the data gathered from analysis of the different engine components that my inner data geek gets excited,
It’s the kind of stuff I used to do at The Great Big Research Company in my initial job in the Stat department: picking at the data, looking for stuff which shouldn’t be there and is, and/or stuff which should be there and isn’t.
My favorite quote: “These are big numbers. Are they big enough to ruin an engine?” (He’s talking about a hundred thousandths of an inch, which in the real world would scarcely matter except when you’re looking at precision-made machinery.)
I’m not going to post a spoiler, here, but it involves the level of chamfering around some holes.
What I truly love is the level of expertise shown by all the guys in the video — and when they bring in Dave himself, his explanation of the problem is absolutely brilliant.
Go and watch the video. It’s half an hour out of your day, and I promise you that you won’t be disappointed. Even if you’re not the slightest bit interested in the minutiae of engines — which would make you similar to me — the journey is worth the time.










