Real Mechanic Reacts to Catastrophic Engine Failures

We hired real mechanics to break down catastrophic engine failures. Some of these are from user error, some are mechanical failures, and some are just freak accidents. Hopefully you can learn something about what NOT to do when working on your own car.

Huge thanks to our experts: Paul, Sandro & Jacob! Drop some love for them in the comments.

Real Mechanic Stuff is a brand new channel from your pals at Donut. We'll be featuring all kinds of automotive experts every week.

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[chiggen]

2 videos in an hour, you guys work way harder than those chumps at donut.

[docgiggles]

For those that don't know, the truck that launched it's engine out wasn't broken motor mounts. Pullers like that have strengthened everything in the engine to the point the block itself is now the weakest point. That truck blew the top half of the block, head and all, right out of the truck. You can see in a different picture of the truck after that the crank and pistons were in it and the cylinders were in the part that launched out.

[henrysutulovich]

Little know fact here, in order to complete a true, 100% percent oil change, you can't just drain the oil and replace it. That leaves all the old oil on the interior parts.... to make sure all used oil is gone, it's common practice to leave the pan off and bang the rev limiter for at least 3 minutes to burn off the used oil. Pro shops dont want you to know this performance technique.

[iconpoet]

Sandro is the most mechanic looking mechanic EVER

[GUM]

Jeremiah and Sandro are the best duo without them even knowing it.

[Huxaifaismail]

Sandro is always saying “that’s dope” and I love it😂 like, “shit you blew the head gasket?” - THATS DOPE. “Damn, that guy crashed his car” - THATS DOPE. Thank you Sandro ❤😂

[leojensen]

In case anyone was wondering that semi that lost its engine during the pull was probably pushing close to 130-140 psi on triple turbos. The pullers go hard

[BazzaroPlays]

The run away diesel was a constant risk when I worked in the oil patch. All trucks and equipment were required to have positive air shut-off systems incase of a gas leak. Crazy stuff.

[JayFredTheFreshest]

Runaway diesels usually are a matter of an internal oil leak, the diesel will start to burn the oil as fuel even after you cut the fuel injectors off.

[iathenakemp]

thanks for explaining what happened to my childhood school bus that one time. She was an old girl that broke down a lot, we had to cross on a ferry to get to school and one day when the driver was warming her up, he stood outside to talk to a parent and the bus started just revving and it got pretty high pitched. Never saw that driver run before or since. now i know why

[evaldsinanovic]

Sandro and Jeremiah are a great duo...keep bringing him back. Hes got a chill laid back sense of humor

[Vok]

I love the chill mechanic who's just like "let it evaporate bro".

[thecauseandeffect]

"the internet thought we were bad at working on subarus" hilarious

[jamesw]

Sandro never fails to make me laugh. Seems like such a chill dude

[antoniobasile]

This is going to be my favorite channel, don't tell those guys at donut media 👀

[ajorsomething]

It's hilarious that whenever you see those flood videos, the water is shallow enough that maybe you could get through if you go slow, but people attack it so fast that it creates a massive wave over the front of the car that floods the engine.

[rob]

6:40 diesels runaway because they’re compression ignition and often run a high pressure mechanical fuel pump AND volume pump. The faster the engine turns, the faster the pressure pump turns. If the throttle plate sticks open (engines are pumps and are pulling a vacuum) mechanical pump is gonna pulled more fuel (and you can run on just a pressure pump I believe VW did it in the late 90s at least), timing is there. So you got stoicheometry and she goes. Slam a board over the intake to starve it for air or cut a fuel line underneath; flaring a fuel line and putting in a union is cheap versus a motor.

[lakshyajeetvirdi]

Getting the water out of the engine at 15:00 was so cool to see the firing order or the engine.

[arthurryanorilla]

Just imagine a shirt for Sandro saying
I see you did it for the boys.
With a blown engine while he's next to the shot out connecting rod.
😂

[boltonky]

Runaway diesels are no joke, i have a big diesel engine from the 60s for industrial equipment that does it sometimes and its one of the scariest things i have dealt with.
Great upload