As an engine builder myself, should never use sandpaper on the stem, this removes material causing balve to guide oil clearance to increase which can cause immature wear of the guide as well as the valve

Well my valves don't seat properly anymore, but hot damn they look good.

Wow it looks so much better thanks, next I think i'll polish the inside of my gas tank

Guys calm down. This guy is certified youtube mechanic

Don't forget when re-assembling the engine, to install the piston return spring.

please take this down before people ruin their valves

I took it to the next level and plastidipped my valves black..damn they look soo good!

Im going to do the same process... and use those valves as key chains.

For those that don't know... There should actually be a degree of roughness on the valve stem/ face to help atomize fuel... DON'T polish the valves like this guy does. Also if you chuck your valve into a drill / drill press, you should have a piece of rubber tubing in between.

In this episode: HOW TO REMOVE MATERIAL FROM YOUR VALVES SO THAT THEY DONT SEAT OR SEAL PROPERLY

Valve lapping is a must now after you sanded them valves. The valve must match the mating surface on the head to have the proper seal. Good luck.

You seem to be under this pretence that shiny = more power/better performance. As long as the big chunks of carbon are gone the valve will be fine.

Thanks for makes us laugh and let me know when you car blows up 😂😂

Glass media blasting a valve has fundamentally changed its geometry. The reason valve work is expensive is because it should be done precisely using machines and the correct tools. I know it looks shiny and you've improved somewhat boundary layer resistance, but what you've created are incredibly minute changes to the diameter up and down the valve stem, and probably reduced the diameter of the valve head somewhat. These things are a minute and 100% factual science now bro. There isn't any subjectivity anymore. We have run millions of engines millions of cycles in every application under the sun, most of the people who said you did a bad job are unfortunately correct. Some research into what valves are and why they are important would have gone a very long way here. Whether you lap the valves afterwards or not, you've messed with the valve geometry on a scale you don't consider important, and thats fine. But the scale is important and all these guys in the comments telling you that have a point. What you did will severely reduce the life of your valves. Just an FYI when they make valves from scratch they balance test them, test for roundness, check tolerances and sizings to the thousandth of an inch, and ensure they all weigh exactly the same, and most importantly, your stem guide clearance should not be anything but the most accurate it can possibly be. Sanding the stem of a valve is very very silly if you want your engine to run hard, fast or long periods, or indeed, all three.

Congrats, you removed the Black Nitride coating that protects the metal.

I usually spray PAM cooking spray on the finished product for longevity.. great video man.

Thanks for the tip , after I polished the valves using your method I figured why stop there? So I sandblasted, sanded, and polished the inside of my whole exhaust system, headers and all. I burnt up 4 dewalt drills in the process. It’s a good thing I don’t have any compression because it looks so fast and air doesn’t want to stick to it. Haha I can’t even pretend to not know as much as you. Thanks for the customers too bad they can’t sue you for bad advice.

First never do this. Two polishing affects nothing. Shape of the valve improves performance. Feel bad for anyone who does this. The ignorance in this video is shocking.

really? wet sand the valve stem? you want your stem to guide clearance at like 0.006 too?

I did the head gssket on my car. Having sent this video I stripped the head. Skimmed and hot washed Polished up all the valves and lapped them in. The head looked amazing. As you say its timely but very effective technique

You should wrap the valve stem in masking tape where it's gonna be touching the drill Chuck to avoid damaging it

WTF, why dont you spray paint your valve's. They'll look awesome

I just watched a guy sand blast a valve?!?!?!

all that truly matters is that the valve seats properly, that carbon will return within 5000km easily

Professional machine shops will only walnut shell or soda blast valves. The point is to remove all deposits but not remove any metal from the stem and face. You have changed the shape of the valve by sanding it.

THIS VIDEO SHOULD BE REMOVED FROM KZfaq SANDING THE VALVE STEM MAKE LOSE THE ADJUSTMENT BETWEEN THE STEM AND THE VALVE GUIDE

Why on earth should you polish the engine valves?! all you need is to remove the built-up carbon... Also, sanding the valves might cause improper seal when you get a spot sanded more than the others!

Love your Chanel your actually my only subscription... reason I’m doing the exact same project . 2009 jcw same problems that your having . I did a diy polish on the head runners . Got WAY STREET CAMS . And upgraded turbo cartridge . Didn’t want big turbo .... r56 get a little volatile in my opinion. My name is Mark and I’m a full time heavy equipment mechanic just fell in love with driving minis and appreciate your videos

Hey Milan, been a sub for ages now. I like the fact you're cleaning it despite the fact it'll get dirty. However, I'm concerned they won't seal as well as they used to because you are removing media around. That's what sanding and polishing does after all. You've also removed material from the mating surfaces too. Remember these parts do come with tolerance when manufactured. I wish you all the best and still love watching you. You show you have a passion for what you do and I'm sure nobody's opinion online will change that. Keep going. If you want a cheap Bentley, speak to hoovies LOL

The very second he started sanding I began laughing. I had no idea misshapen valves improved engine performance

Also, I can't see that this would hurt as long as polishing does not occur on the stem. I would be worried about the oil clearances on the part that enters the guide. But as long as its just the head, that is fine. You can get a performance benefit because polishing will help keep carbon from sticking to the valves. The same can be done to the combustion chambers and ports. Great video.

If I may recommend, use scotch Brite to remove the carbon and 3k grit paper to polish. The more you sand and polish on the stim, the more clearance you create in the valve guide, which might be bad.

I would do this on a display piece or a car parts art piece. Not for functional use. This is about as useful as polishing the inside of your differential cover.

Cool, if you're gonna use the valves in your living room or somewhere to admire them. In an engine you should give the head to a shop to relap the seats and relap your already screwed valves... Then compression test the cylinder chambers.

Thumbs 👍 up for increasing stem/guide clearance. Completely unnecessary other than the scotchbright

I use ChemDip to soak the valves first. This loosens up most of the carbon and makes it easy to just wipe off. If you don't have a media blaster like in the video, I'd recommend doing this first before sanding the valves.

I did this on a spare head laying around for shits an giggles and it works out quite nicely and after polishing I lapped the valves back into the seats and got a solid seal with oem margin (width of seal) and also when sanding I purposely put pressure on the leading and trailing edge of the margin to create a radius on the valve creating a poor mans 3 angle valve job.. Since this is with very fine grit sandpaper there is lil chance of doing anything but smoothing out the 2 angles on the margin and did not affect the sealing as the lapping of the valves came out perfectly I maybe spent 3 times the amount of time I normally do when lapping in valves because of this ... not only polished to reduce carbon build up but gained a lil flow as well ... granted I was willing to try this out as I had a spare head lying around but all in all this is not a wasted effort as I fully port and polish the heads when apart and repace guides and seals as well so Im not simply popping a head apart to polish the valves Im already in there doing other stuff and this procedure is saving me the money I would normally invest in a set of polished valves ... carbon build up is anti horsepower and doing everything to prevent it sames time and money ... 30 years ago when I used to race my camaro every winter I would tear entire engine apart to freshen it up for next year and remove carbon ( back then it was really an issue) for complete tear down rings and bearings and new oil pump and water pump etc,,, only cost $135 for everything so it wasn't that big a deal and occasionally you find something that if left unchecked might have cause a major issue

You should sand the camshafts and head surfaces next 😂 This guy's bright

This is an April fool's gag right?

wow this is so much great. my car won't start but my valves are clean and shiny. thanks for setting my mind at ease.

Wow, this is going to save me some money. Looking to rebuild my 95 v6 vortec engine in my blazer. Glad I found this.

You definitely should have a good catch can setup for any direct injection motor if you don't want to see crap build up again. As a tip, you only need to clean/polish the part of the valve that sticks out of the guide. Do it then you'll have a loose valve that wants to kiss your pistons. Also don't ever touch the valve edges where it seals with the head because if you shave a lot of material it'll be hard to fix it with lapping only.

Even if you did regrind the valve seats (wich you have completely destroyed) and you didnt touch the valve stem, you still have to worry about how broad the valve seats become (regrinding always makes them a little wider) if that is out of spec it might either overheat your valves or not seal properly. Dont worry about that after touching the valve stems though , because by then you have just completely fucked up and are free to get new ones.

this type of refurbishing is damn good to convert working engine in to home furniture, will look really awesome, don't forget to buy ticket for public transport!

Thanks for showing this entire series! I have binge watched the whole thing on my day off. Owning a mini it’s awesome to see a complete breakdown of my engine only now I wish I had an engine worth doing all this too!

The chuck could damage the valve stem. Sanding the valve stem where its in the guide will make it loose.. Sanding the valve sealing face will require it to be lapped.

Wow, WRECKED them (can't believe I watched this)

Good video I'm sure you know the valves and head will need to go to a machine shop for a valve job now. But I like it nice work. I do a similar process but I stay away from the seat area and don’t do that much polishing.

cool.. I m doing mine right now... perfect!!!

Great Idea but I’d recommend lapping the valves after otherwise the valves won’t seal.

Drill chuck scratches valve stem --> crack growth site in the metal ---> valve drops

Best method to make the shiniest and smoothest paperweights. Can be used to crush nuts, draw a circle outline, a keychain,Christmas ornament, or bookmark.

Great and very helpful straight to the point, is there’s any other method of cleaning your intake valve without getting them out ?

What about lapping the valves? Making sure they still seat well with the head.

Awesome attention to detail! A lot of people half ass things. I guarantee if you lap those valves it will seal perfectly. Great job!

Oh my...you made me want to open up my engines and polishes everything in there! Haha. My hands are itching but, my dad might kill me for doing so. I stick yo polishing his tools instead. That is, for now.

You simply the BEST! With high grade and respect from Russia!!!

why would you do this? It is like cleaning inside of exhaust!

Important!! remember to lap the valves before you put it all back together as your valves won't seat properly.

wow amazing work! i want to do use Valve Grinding & Lapping Compound, should i use it after or before polishing?

Great vid and very true, one time my motorcycle wouldn’t start because of a Valve problem. RECIFE - Brazil here...

What about the valve seats not matching up now?

No man no no no no

I can't wait to hear that engine sound you have to make another video with valve in action jajajaja lol

This a great video keep it up

dude read a book or take an engine machine shop class before "teaching" others. The grain structures of the valve and seat are ground together and lapped so they will in essence fuse and make a complete seal For a split second during combustion. Second that valve has a cam on it the rotators are moving it so that same grain structure won't over heat in spots that'll lead to a blow out of valve. Look up a video of ringing in a gage block. Same concept. Powertrains are the most temperamental aspect of any type of mechanical unit, and it's a science. I'm not trying to sound like a pompous ass but dude keep the scene " oh bro it's so clean fam" shit on the side or else you're gonna be junking a project you dump thousands into. Also ~ learn something new every day~

Great video! I can tell you put a lot of time and effort into the video, so thanks. Because you are spinning the valve on the drill, it will remain (for the most part) the same shape. Just make sure that when you reinstall the valves, you lap and grind them to fit the valve seat (something that you should be doing anyway). Remember, valves need to make a perfect seal with the seat in order to hold compression. The valves look great! Cheers!

Fantastic work!

Awesome video bro thanks 👍👍👍

next video .. asking why are my fuel trims so low . my does my O2 keep reading off .

No, don't sand the stem or even scotch bright it. Also tape the stem before you put it in the chuck otherwise if will possibly get damaged by the hardened teeth of the drill chuck. Any metal removal from the stem is bad and will cause oil consumption and shorten the life of the valve. Otherwise not to bad.

Excellent contents, regards from Mexico bro...

The lapping of the valves is the most important thing to do, and that produces a dull matt finish where the valve sits, definitely doesn't need to be shiny and polished.

I hope they least lapped the valves. But I just buy stainless Steel valves and have it port matched by my machine shop.

This is wrong please nobody do this. None of your valves will ever seat properly again

Great videos. best on yt for the mk4!

Well done

abbrasive + valve= out of spec valve + leaking valve face / stem seals

When you out the valve into the drill, put a piece of tubing over the end that goes into the drill so you don't screw up the metal on the valve when the drill clamps

Reminds me of a time I was at a swap meet. 3 Mexicans were selling metal polish and doing demonstrations on the bottom of aluminum pop cans. As I'm standing there, an old guy walks up with his buddy. He picks up a can, inspects it, shows his buddy, who nods with approval. He looks at the 3 Mexicans and says, " You boys are doing a fine job, keep up the good work!" Throws down a dollar and cracks open a Coke as he hands one to his buddy and they turn and walk away. All 3 of the Mexicans stopped polishing their pop cans and stood there with sad looks on their faces. I couldn't stop laughing!!!! It made my weekend!

i'll tell you what, valve manufacturers do not want to let that secret out of the bag. that's a complete valve restoral to new like dimensions. this guy in the video knows what he's talking about. i would even do this to brand new valves, sorta like breaking them in before you run it. the valve face has got to be "universal" after this treatment. if you have another motor of some kind you could always use them after the short life your valve job didn't last. just re-polish them and put em in.

Mine were so shiny, that the air flow over them sucked the guts out of my air filter....

LOOK GREAT! Now toss them in the trash and go buy new ones with proper clearances.

Haha shit worked great came out just the way it shows in video! Thx!!

Keep it up Milan , hello from Romania !

So you going to do this every few thousand km because it will look back like it was before by then

Hey I have a really weird idea but maybe after polishing the ports and valves you can ceramic coat them which in turn makes the air flow faster

Great tips for using drill to clean valve! But I definite wont polish them since these valves have coating.

Nice effort Milan 👍👍👍

You missed April 1st by 4 days

Your valves look great! Shame they are useless now

Easy to follow. Thanks.

Would you have to do anything with the head if I polished the valves to this degree for them to seat right?

R.I.P valve seal :(

He sand blasted his valves??? Is he mentally deficient?😂😂

Nice tip thanks!

This video is great but make sure when doing what is shown in the video to stay away from the part of the valve that contacts the seat in the head other wise you can cause valve leaks ! Other wise you will have to re-lap the valves with valve compound .Also if you have a small drill press you can put the valve stem in the drill press and take a metal file for filing metal and take your time but remove the ridge on the valve just behind where the valve rest on the seat ! Works for both intake and exhaust valves it saves money and free's up horse power and air flow. On the exhaust valves only you can round out the two sharpe edges on the edge of the valve just above where the valve rests on the seat! It creates better flow and no turbulence when exhaust gas leaves the cylinder exits through the exhaust port!

Definitely film the first start up, can't wait to see how she runs

Shouldn't attach a valve to the chuck of a drill let alone sanding it. That is about as smart as media blasting a cylinder head

where did you get that tray from mate look great and I need one.