Exhaust gas recirculation (EGR) made easy

Exhaust gas recirculation is used to reduce harmful emissions from petrol and diesel engines. In this video, we show you how EGR operates, the components it is made up of and how they work.

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[grc]

Basically an EGR valve forces the engine to smell it's own farts.

[cjtyler]

What they don't tell you is that particularly in diesels, it reduces fuel economy which in-turn increases fuel consumption. I also increases engine wear and reduces engine life. If the EGR or EGR cooler fail (which they do often) they can allow soot into the cylinder which can coat the cylinder walls and damage them or the piston.

[ddaniel]

Racepipe and full egr delete. The way to go for

[NickWarrenZA]

Great video. Simple explanation - easy to understand. Great CGI. Very well done. Thank you!!

[StrongFreeLovin]

EGR - what makes cars less fun, repairs more expensive, bureaucrats happy.

[TammyDenseDdank]

Just did this on a VW TdI. These engines suffocate themselves and in the long run, they than pollute and consume more fuel than necessary because of the wear. Ingenuity and complexity at its finest. Thx politicians and environmentalists! May you inhale your own farts!

[AIRPORT-mcys]

ALL OUR LIVES we are told the IMPORTANCE OF CLEAN AIR FILTER for engine longevity.
then manufacturers DIVERT ABRASIVE/ ACIDIC SOOT back into the cylinders which GUMM UP RINGS, abrade bores and ACIDIFY OIL.

[richardschofield]

I have no issue with new cars having all this complicated emission requirements, but what I find frustrating is that by the time modern diesels are 15 years old they just won't be maintainable.
These complicated egrs, dpfs cats etc cost a fortune to replace such that it may be more economical to write the car off.
Is that sustainable?
I feel there should be relaxation on the rules when a car reaches a certain age.
Cars may be considered classics when they are 15 years old so that age seems about right to me.

[fireonmytarget]

Great explanation of a shameful wicked system.

[gadsdenconsulting]

Thanks for showing this. Now I know how to dispose of it on my diesels. 👍👍

[CarlosRodriguez-hbvq]

Glad you included both gas and diesel engines, since I have one of each.

[soundseeker]

The environmental aspect of reduced NOX emissions is all well and good. Unfortunately all these parts eventually clog up with soot and are usually in difficult to reach positions, making removal and cleaning a difficult and/or expensive job. Same with the DPF - Great idea when it's working, expensive to fix when it doesn't!

[chrisconner]

And also significantly reduces the life of your engine.. They love that part to .

[goatsinker]

I used to always install a plate under the egr valve, blocking it's function. Used to! I now do the opposite, i "block" the egr valve open permanently, this allows me to advance the ignition timing substantially, so that i get a lot more power out of a lot less gasoline, without any knocking or pinging.

[homeistheearth]

I really have a hard time understanding this concept! We take warm hot exhaust gas and put in into the cold intake air, to cool the combustion chamber so it reduces nox? I find that like trying to cool your freezer with a blow torch?
Also we take exhaust gas and take it into the intake to lower O2 levels?! To reduce CO2?
Well how do that work? If you lower the O2 level, the engine would want more air to make the lambda burn fuel near stoikiometric?! Hence doing this would reduce the engines output and wasting the efficiency? It makes no sense to me why you would do this or going this way to solve a problem.

[megachef]

It’s a old inefficient system in my opinion, yes it keeps engine temps low, good for a old Tahoe an it’s little clutch fan in the summer, but choking out the motor is no fun. There’s better methods, I’m removing mine😂

[OldSchoolNoe]

Learning functional tests, EGR is part of the test in some vehicles

[chrise]

What would be the temperature difference in the combustion chamber with vs without recirculated exhaust gas?

[topcars]

Thank you for the information provided. I have a question. I want to inquire about this part. I have a 2011 Yaris with a gasoline engine. When I turn on the feature, I read the live data on the EGR. The reading is zero while standing, while driving, driving lightly, and driving at an accelerated rate. The reading does not change, knowing that it was checked with the special computer in Toyota cars. There are no codes. Malfunctions, but the engine is unstable when parked. I see the engine tachometer at times stable and at times it drops below 550 rpm. Do you have any solution for this car? Thank you.

[ericb.]

M y2019 MAZDA 2.5 L. turbo engine has a liquid cooled EGR "intercooler" setup. More costly but worth it.