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Interesting or educational articles, videos etc.

"How stuff works"

(does not fit into 'News' topic)

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This popped up as a suggested watch. The guy explains the innerworkings of a 5-speed manual transmission and demonstrates it all, if you can get tolerate it to get around the guy's coughing. He shows what a synchronizer is, and briefly explains how they wear out. We've had a few people ask why their car won't go into certain gears and will grind/ pop out, but it will go into others. This explains pretty well why that occurs.

(22) Manual Transmission Operation - YouTube

Posted by: @justin-shepherd

This popped up as a suggested watch. The guy explains the innerworkings of a 5-speed manual

I've watched this guy a lot. He has a very impressive library of videos covering every transmission imaginable. (and differentials, transfer cases, hybrid drives, etc etc...) He breaks them down and turns them into models with labels and all, so he can visually demonstrate how they work.


I was never able to quite visualize how a differential works until seeing this recent film:

Posted by: @chucktobias

I was never able to quite visualize how a differential works until seeing this recent film:

Yeah that video is an absolute gem. Breaks it down in such a visually intuitive way. You don't see quality content like that any more. This video, and many others are already posted here:

My professor in my intro to gearing and hydraulics course showed us that video. I also could never visualize a differential before I saw that one.

No video in the last 90 years has been able to beat that one.


He has a very good channel.


Idle fuel consumption. (8 minute video)



Idling 4 different cars for 2 hrs, and measuring how much fuel they burn


2012 Mazda 3 Hatchback

0.44 gal


2019 Ford Mustang Ecoboost

0.70 gal


2019 Subaru Outback XT

0.84 gal


2008 Ford F150 XL Triton

1.17 gal





I showed this video to my girlfriend when I was describing ignition timing and how engines work. She's not really into engines, but she likes old cars. She remembers the roles Posi-Trac and ignition timing play in the movie My Cousin Vinny. Haha. This is a pretty well made, in-depth video. She asked if ignition timing is similar to sewing machine timing. She likes sewing, and this was something she could associate it with. I would say yes, it is. 


How fuel pump nozzles and the automatic shut-off work.



Why humans are no match for ABS -

I'd like to add a demo about why ABS is needed (what happens if the wheels lock up)

Also in the video he didn't mention that ABS enables the use of "Brake Assist"

(A standard on most cars, Toyotas since '97)
The way it works is by the car's computer determining the driver beginning to initiate a "panic stop",

if such a determination is made, the computer overrides the brake input and engages maximum braking.
This not only prevents cases in which the driver has not fully engaged the brake pedal by mistake,
but also makes the "panic stop" faster by about 500-750 milliseconds which it would take the driver to fully engage the brake as it takes it only a few milliseconds to interpret the brake engagement as "regular" or "panic".

(According to Mercedes, in a 1992 study they found has found that in 90% of accidents simulated on their driving simulator, Drivers have failed to put enough force on the brake pedal - Hence the need for Brake Assist. Without ABS, Brake assist would be useless as it'll just always immediately lock up the wheels.)


Interesting video if you want to nerd out on tires. The technology that goes into the tread patterns etc.


Road Barriers



I've always liked the '08 and up Challengers, however I would never buy one due to their general lack of quality.

I found this explanation for the Hemi camshaft failures interesting:

This post was modified 2 years ago by AutoDIY

The 1st automobiles, octane rating and gasoline additives.



Interesting video about the development and future of battery technology. (touches cars too)



Interesting oil analysis and comparison




Various engine parts made transparent, so you can see how they work inside live on camera.



Why Chrysler muscle cars suffered from spun bearings on hard acceleration and Chevy came out on top:


Be careful buying classic cars! (Modern ones too!) Dealer/flipper disaster...


Not strictly auto related, though many concepts do transfer. Engineering geeks will love this.

It's an hour long breakdown of how the Apollo mission heavy lifters work, by one of the engineers.

I love hearing about the precise craftsmanship that went into this thing, and how they overcame the technical obstacles that came up.

This thing needs separate jet engines just to inject the tons of fuel that the rocket needs! So cool


I stood next to the Saturn 5 rocket on display at NASA's Houston space center many years ago. (I don't know if it's still there.) The rocket was laying on its side, big as a skyscraper. Practically unbelievable that they put 3 guys on top of that thing and lit it off.


mind blowing isn't it.
They got this thing, which weighs thousands of tons, 115 miles up into space, and moving 25,000 miles-per-hour.
(not to mention put people on a little rock 1/4 million miles away and then come back)
It's remarkable what people can do when they put their minds to it. Where have those golden years gone?
We can't even build a car properly now.

@mmj, and they did it using computers many times less powerful than a "smart watch" is today.

oh goodness, I think my coffee maker could send a rocket to the moon.
What have we done lately except glue more faces to screens?
And people complain that entrepreneurs have all the money.


Gasket maker tested.


Results @ 11:00. Don't buy Loctite



Debunking Hydrogen combustion


If only we had some kind of fuel that was energy dense, stable at room temperature, quick to refuel, and cheap to produce and use.  Something that already conveniently captured millions of years of the sun's energy, it's made from plants (biofuel), and stored it away neatly in the ground, ready to take out and use ...


"Ceramic Coating"

The latest rage in automotive cosmetic products.

Does it live up to the hype?


Tested under an atomic microscope.

No. Unsurprisingly, it's a big fat scam.




Fuel Injectors in slow motion


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What is gasoline? Did you know that it was once considered waste?


Yep, before they had a use for it, gasoline was allegedly dumped into rivers in Pennsylvania. They couldn't do anything with it, at the time.

Topic starter

nice torque converter explanation video the car care nut just put out, including why some Toyotas get shudder.

Topic starter

The Car Care Nut - 10 car myths

0:29 Can you switch oil types
2:14 Should you turn off AC when shutting car off
4:35 Is it harmful to overfill the fuel tank
6:33 Should you put Nitrogen in your tires
9:41 Should you use high octane fuel

0:21 Should you warm up your car
2:29 Do auto start/stop system damage your vehicle
5:15 Lifetime fluids
7:07 Should you break in your new car
9:37 Should you use stop-leak products


This is a kind documentary on why GDI engines are bad over the long term, besides carbon building up on valves. It's actually pretty interesting. Engineering Explained teaches it. 

Topic starter

This clever fella built a replica V8 engine out of plexiglass so you can see inside and see how everything moves together. Nice little educational demo.


The carbon fibre AWD Cutlass is cool too.



This came up as a suggested watch, regarding piston rings. Seemingly simple devices are in reality quite complex. Owners of more recent Kias and Hyundais that burn oil may consider is to be helpful. It all comes down to the piston rings. 

They sound really simple on the surface, but a lot of engineering goes into piston rings. The profile is critical to how they work, and yet the tiny features are hard to see with the naked eye.


(1) The Story Of Fuel Injection - YouTube Here's a video about fuel injection. I read today that the later models of the B-29, specifically the B-29s which dropped the atomic bombs on Hiroshima and Nagasaki, had crude forms of fuel injection.

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