Variable Valve Timing Explained - Like Never Before 

Very good explanation of variable valve timing and how it works. I'm old school, worked on engine rebuild in the days of 4-bbl carbs and no pollution control baggage. Trying to learn and understand the newer technology and how it works. We've definitely come a long way in engine design. Thank so much for this video. A combination of theory, drawings, real engine parts, and explanation is an invaluable tool for teaching which helps everything you discussed make sense. Kind of remind me of my instructors I had when I took auto mechanics trade school in the early '70s. They used the same instruction methods which works well. Bravo.

Your explanation of how VVT works , and how it is employed in effecting Exhaust Gas Retention internally ( as opposed to Exhaust Gas Recirculation which requires separate externally installed valve in older engines ) , to me is the highlight of this video . Keep up with the good work!

The "5-stroke" joke you made in the first minute of the video was legendary by the way.

I really like the way you break it down, simple and uncomplicated. The average person can get clear information without a degree in engineering. Thank you very much!

Totally agree with the title.."variable valve timing explained - like never before". Glad you got more space to make more videos!!

Woah, now I understand! I replaced my intake & exhaust VVT solenoids on 2017 GMC Terrain at only 43k miles. Intake side was filthy!! My oil has been changed by the dealership regularly so I’m kinda upset at what I seen on the solenoid. Now it runs great again and no longer stalling. Thank God for RU-vid because it has helped so much!

Ive been trying to understand VVT and how its achieved through oil pressure. This video is perfect in explaining how and why. I particularly enjoy the humor interjected. Well done in all aspects. I subscribed.

Thank You for taking the time to explain how it works! Its so hard to find the correct information and application! I truly enjoy your videos!

Old timer here and now I understand about this variable valve timing. Excellent job explaining! Congrats. on the new move and hope it's saving you some money. You have some of the best videos out there on fixing cars. My first car was a 1960 180b Mercedes and those weren't the fastest cars but what a dream to work on. None of this computerized stuff. So that was back in 69 and have been working on my own cars ever since. Unfortunately all of the injuries have caught up on me and it's getting to painful to do the work although it's been so rewarding being able to be self sufficient! So lately I've been looking at Lexus' and from what I can tell they seem to be the best built cars out there. Would love to here your thoughts. Thanks and keep up the good work.

Beautiful explanation. Perfect balance of theory and real-world visual examples.

Love these videos. I finally understand a little about this valve timing thing. Thanks, Ratchet. You're a real pro.

From 8m 30s, the Ecotec VVT explanation was just terrific.

This guy is too quiet and patient ... I like listening to him, good job, man!

respected worker n teacher, we support you👍

Thank you for explaining the vvt. I like the board holding the hood up & two less flies to breed. Keep up the good work.

That is a very very good explanation on vvt. Wish everyone could show stuff so clear.

This video is so explicit and for dummies ....thank you for your effort !

You are a very good teacher and mechanic

Great video, really informative, I had a basic idea of the concept of VVT but lived actually seeing the oils paths 👍 love the dog too!

Lol I love the little comedic parts of your videos. Keep it up!

New viewer and sub here! So living on my own and now having to do work on my own for vehicles, I had my first engine indicator come on. Wanting to learn to do things on my own, got myself a bluetooth obd2 reader and app. Now I am learning about what the part I will be fixing has to do with how my car works. This is leading me into a rabbit hole of education on, well put honestly, how vehicles work :) And this so far is what led me to your content and I love how you present things :D

Very educational...now I know how the VVTS works! Good production, good enunciation! Thanks

Your content keeps getting better and better. Good stuff dude. Congrats!! - Saludos

How is this not the #1 educational channel on youtube yet?

Thank you.I have this engine in my Aveo 2010.I will clean my cam position solenoids and hopefully cure my intermittent acceleration(bucking)problem.I did not know the exact theory behind the variable timing but your explanation was right to the point.Thanks again

I'm glad your still doing what I like to see. And your a good 👍 at what you do. In explaining and making us understand the difference thanks 😊

I enjoy the videos. .. since my specialization is pre- 80s resto-mods, you provide me with good info on the newer garbage that I'm forced to work on from time to time.

Great video. I love how you always explain some of the more seemly mysterious automotive theories into ways people can understand. Congrats on your new combo house workshop. Its so nice to see people stand up to landlords who are always trying to raise rents on good tenants. Im proud of u.

Your the best at explaining theory and practical mechanics. Congratulations on the new house and shop. I always enjoy your videos. If by moving there means it will make it easier for you to make videos then your right, it's a win, win, and maybe another win indeed.

Hello, thanks for your video, I disconnected the MAF and the car idles low, it does not go up more than 500 rpm's and the brake is a bit hard, although the fault disappears where the ralenti is 2000 rpm's and the brakes stop oscillating RPM's from 1000 to 2000, you can't drive. I bought a stock MAF like the one you have factory at Toyota and it didn't fix itself. I thought like you about the leak and had the servo checked and they told me it was fine. Take out the intake manifold and seal some joints that seemed not well sealed. Another test that I did was to disconnect the brake booster valve and the rpm's also drop to 500 rpm's, the brake remains hard without the help, you can't drive like that either. I will also tell you that we removed the throttle body and it was submerged in special liquids, no dirt came out, the car in general is very careful, the only thing I could not remove is the IAC valve because it has a special 25 Pentalobe type key I think, but I can't buy that tool, the same thing, both the IAC and the TPS were cleaned and measured with a tester and the injector voltage was checked and it works fine. I also changed the intake manifold gasket, spark plugs and PSV valve, all original Toyota, the Toyota scanner and other colleagues say nothing of failure. I put a vacuum gauge and it measures 18 normal psi and when accelerating it drops to 0 and then recovers. I don't know whether to suspect a leak from injectors, I am very disoriented and worse, I live in a very small city far from any official service to take to the car and no one has a vacuum gauge and has smoke to see where the leak could be. If you can think of a control that you can do, I would appreciate it. Greetings

What a fly episode. I like the way you explain things.

Awesome explanation of VVTI, thank you very much Imon.

Best VVT explanation I've ever encountered on youtube. Thanks!

You explain it so well. Wish I could be your apprentice 😎

As usual, excellent video. I always wondered about how variable valve timing worked.

Very helpful. I was looking for someone to explain this. Thanks

Excellent explanation. These were always very mysterious to me. Thanks for clearing it up!

Goodluck with your new workshop plus home bro......It seems this place was much better than earlier place....

Outstanding job buddy, keep up the hard work it's greatly appreciated🙂

Thanks for the explanation. Fighting a rough idle at stopping, on a Corolla 1.8. Gonna try cleaning them first. But at 37$ might just replace at 250k miles.

Good luck, and thanks for your videos and explanations. Keep'em coming.

Awwwe I love that “butthead” and that’s an awesome idea. You thought of getting that house with the two part garage. Love your videos. Thanks for sharing. ✌🏽

Awesome video bro. Congrats on the new house too!

I enjoy your videos”very knowledgeable.specific! Straight to the point keep it up

Congratulation to your new house and shop.... I really enjoy watching your video and learned a lot.

Thank you for your nice video. Good luck with all your work no matter which one of four above engine moves you do.

Thanks for the videos you make, it’s so easy to understand

This video was fantastic! Thanks for the great explanation

Great explanation. Wish you all the best in your new place and look forward to more videos.

Great job explaining a very good part to learn for future uses to repair automobiles

Excellent 👍 explanation. As good as the GM technical videos of the 30s. Thanks.

Very well laid out- super job!

Man good job on explanation of that really hit home and I understand much more clearly now thank you

I understood exactly what you just explained. Thank you..

Always wondered about how this works. Thank you for the info.

Thank you for this video. Very clear and helpful.

Great explanation! Fascinating. Thanks.

Your videos beat any money shot!

Enjoy your videos, and your humor!

Awesome explanation of components. 👍

thanks for your precious time, very informative, good luck

Nice explanation. Love the hood prop.

Your engine looks similar, if not identical, to my Chevy Sonic 1.8L LUW. I just replaced my head gasket and also ground the valves, removed tonnes of carbon buildup on the exhaust valves and Pistons. Great video. Now I know why I don't have an EGR valve. The LWE 1.8L carries an air pump. Just before putting my head back on, one of my dog was not feeling well that day and vomited on the head, wiped it out but I am guessing the oil filter and PCV system should rid the rest of it 😂😂😂

Very informative - thanks for making this!

Great explaining! Thank you

Great video!! Awesome details.

A clever system indeed, thanks for explaining 👍🏻

Your doing a great job explaining how it works ty

Very in-depth, keep up the great work!!!

Your really easy to like,great job an good luck. Love the dog !

Excellent video. Absolutely helpful. Thanks.

Great explanation! Thank you

my 99 accord vtec solenoid is leaking at the bottom where it meets the engine. do you think its the gasket or do i have to change the whole solenoid.

Thanks for that great explanation!

Thanks for the great vids and keep up the good job !!

Great review!! Every detailed

very educative. thank you regards

Love your videos. Lots of info.

This VVT system always seemed more complicated than it needed to be, and the dependence on extra solenoids and motor oil moving down narrow channels made me wonder how long they would last. However it seems like these systems are holding up fine, so far. Even better reason to change motor oil frequently, ha ha. Good video, welcome to the new shop!

Thank you, Author! Really cool explanation in close relation to real equipment. Could you say a couple of words on the solenoid valve? Does ECU apply a voltage to the coil and have feedback loop through camshafts sensors? Or the solenoid valve has known relation between voltage and valve position, without feedback loop?

Great video thx helped a lot

What a pro explanation, thank you

Good for you!! Its sad how people are getting so greedy but it always comes back to them. You get back what you put out

Excellent tutorial

Great video... What can I use to clean this part? Also, how can I check if the correct current is reaching this sensor? Thanks

Good explanation

I have 2zz engine vvti and variable valve timing oil is not working.can I use 2az engine variable valve to replace?

Great explanation

i am getting a 670d cam position inlet low reading on my obd scanner. Thinking it might be a bad variable valve timing solonoid causing this problem. Would you agree with this idea?

Thanks man. Good job.

Nice video, l like your explanation

Thanks, that was a great explanation

Excellent Video....

brilliant very well explained

so, would a dirty VVT possibly also cause a P1259? I've tried the fix the 1259 code but saw that the VVt was very dirty and cleaned it off. Drove it since but still don't know if this was the issue

Excellent job - thanks

Very informative thank you.

It's a comment to help this channel grow.

Silute.. love your explanations.. good teacher

Seriously and isn't it good to see some with ratchets on hand, actually know about Engine!🤓😎👌🙏