What You Need To Know When Buying A Used Engine For Your Pro…

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Buying a Used Engine Off Marketplace? Don’t Get Burned | The Questionable Garage
We’ve all done it—scrolled endlessly through Facebook Marketplace, Craigslist, OfferUp, or that sketchy classifieds site your cousin swears by, chasing that dream deal on a used engine. But when that dream turns into a nightmare, it can cost you big. In this episode, Jared from The Questionable Garage walks you through exactly what you need to know before buying a used engine that isn’t in a running vehicle—and how to avoid getting ripped off.
Whether you’re on the hunt for a cheap big block Mopar, a Ford 300, a turbo Cummins diesel, or an LS unicorn at a “don’t ask questions” price, Jared breaks down the red flags, smart questions to ask sellers, and the crucial inspections you should do before you hand over your hard-earned cash.
💸 Spoiler alert: Just because it looks clean doesn’t mean it’s good… and sometimes even Jared gets burned.
Along the way, you’ll get to meet the real stars of the shop—Magni and Pyrrha , the Great Pyrenees duo that guard the garage, demand treats, and occasionally steal the show.
👨🔧 In this video you’ll learn:
The key questions to ask any seller (and the answers that should make you run).
What story details can help you figure out if the seller is honest or trying to unload a dud.
How price often dictates how many answers you’ll get—and how to adjust your expectations.
The must-have tools for inspecting used engines on the spot: bore scope, ratchet, spark plug socket, flashlight, and more.
What to look for when scoping cylinders, checking for rust, and turning over an engine by hand.
How to inspect gaskets, turbos, and valve covers for warning signs.
The risk of trusting “a friend of a friend”—and how Jared learned that the hard way on a supposedly good 440 big block.
🚨 Real Talk: Jared walks through three different engines—an EFI Ford 300, a Cummins 6BT, and a crusty 440 Mopar—and shares the good, the bad, and the locked-up solid. It’s hands-on, brutally honest, and a little disappointing, which means it’s a typical day in The Questionable Garage.
This video is part how-to, part cautionary tale, and full-on shop therapy for anyone who’s ever gambled on a greasy pile of iron and hoped for the best.
📣 Let us know in the comments:
What’s the best (or worst) engine deal you’ve ever found?
What tricks do you use to avoid buying junk?
Where do you go to decode casting numbers or get specific engine info?
👍 Like this video? Give it a thumbs up, comment your favorite sketchy engine-buying story, and subscribe so you don’t miss the next questionable adventure—whether it’s Ferrari trucks, Hellcat swaps, or a new heart for the 1970 Satellite that should’ve gone in this week.
🔧 Patreon Members & Channel Supporters: Thank you for making this channel possible. You help keep the dream alive—even when the engine is dead.
Next time: We’re diving back into builds with something big. Maybe it’s a Hellcat project. Maybe it’s a Ferrari pickup. Maybe it’s whatever Jared drags back next. Either way, it’s going to be entertaining and at least a little bit questionable.
Don’t forget:
🧰 Bring a ratchet.
🔦 Scope the cylinders.
⚠️ Trust… but inspect.
And above all, make questionable choices—just not $400 rust-block choices.
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Questions? Comments? Business inquiries? Email us at jared@thequestionablegarage.com
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P.O. Box 437
Lula, GA 30554
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