Hello! I am a car mechanic and i can explain why it works on this car! There a two types of windscreens. The ones who are installed with a rubber gasket around it (like this one, mostly found in old cars). And ones who are stuck in with adhesive (newer cars). What happens is that the rubber gasket can compensate the forces produced by the temperature difference of the cold glass and the hot water, thats why the windscreen on this car is fine. But on newer cars the adhesive does not have enough flex to compensate this forces, and thats why newer cars windscreens are very likely to break when applying hot water. Sorry if my englisch is not the very best, but i tried! EDIT: I see this comment arrouses a lot of people. I know there are different opinions regarding this topic out there. And if you think otherwise thats okay. I just commented this to prevent people from expensive repair costs. So please guys, write your own opinion in the comments but stop insulting me.
Wrong. The adhesive mounting also allows for expansion and contraction. Its soft like bathtub caulk. Ive used hot water on them as well with no problems.
@@joewoodchuck3824 Wrong its been demonstrated often enough that it is not soft enough. The windscreen cracks. Are you from a windscreen selling company or what?
I can only state that my experience fits with my theory. It makes no difference, nor have i ever heard of any difference. All i ever hear is to not do it, but its never backed up with evidence.
@undreamtoceans11 Inferior looking. USSR stuff usually looks cobbled together from whatever parts were available but it is often overbuilt, lasts for ages, and is easy to repair. Due to the shortages of "planned economy" products had to last forever. Again due to cost and shortages the products were improved where it mattered to prolong their life and not cosmetic. It wasn't fesable to have a product break and be replaced after two or three years when you had to wait (on a waiting list) over three years to get a new one. The waiting time for a car went sometimes to up to 10 years! Once you bought something, it had to last. The paradox was that second hand cars for example were more expensive than new ones because you could get them on the spot.
I've been using this technique for over 40 years on all my cars, and I've never had a problem. I should point out that I have worked for 40 years in a company that manufactures automobile windows, so I know that these windows are quite capable of withstanding this thermal shock.
Im doing this on modern cars for a few years now. Trick is to get warm (not boiling) water and pour it slowly. Never had a problem. Tested it for 2 winters on an already cracked windshield - got a stone in it on the highway, same results. Happy to confirm that the crack did not travel further and remained around 3 inches long untill I got a new windshield on. No more scraping ice on cold mornings for me :)
my windshield cracked in the cold February winter, Ford Tourneo 2015, initially a 3cm crack at the bottom, then slowly growing. I did nothing, no pouring hot water, only turned on the heat to windsshield thawing! iit happened about one mile after start-up! Maybe the trouble comes when the hot air warms up the middle of the window first, while the rims are still freezing cold. See, in this "experiment" he, Garage54 mechanic, poured boiling-hot water on the rim of the glass. This way it causes expansion there first and therefore compressive force, and therefore no crack. Maybe?
I've seen this happen to a windshield that was already slightly cracked, Heater on the inside, freezing/snowing on the outside, while driving. The crack started from the driver side and slowly traveled to the passenger side in about 60 seconds. It looked like a single rain drop defying the laws of physics, as all the rest of the drops were moving towards the hood, but this one was going sideways! Tripped us out. Definitely doesn't like the temperature changes, but I guess it can handle a certain amount.
That's crazy. I've had this crack on my windshield since before I bought the car that runs across the nearly whole thing. It's never gotten any worse, and I've had this car for years, and it has gone through multiple winters. People see it and are like, "Oh yea, that needs to be replaced." But it's never gotten worse. It's been the same since I got it.
The temp change is fine. That window already had a stress fracture to begin with and road vibration would have caused what you saw eventually regardless of air temperature.
Its not the temperature its the stress from the movement, usually it starts when u get a rock chip and if the windshield gets moved a certain way it cracks it
As someone who grew up in Edmonton in Canada at 53°N I experienced many -40C and colder days in my early driving years. The temperature on that day there being somewhere between -4C and -10C is not all that cold. Considering how little ice was left on the windshield when he started to pour. Still, I too am surprised the windshield did not crack. I guess that being a Russian designed and built car, they may indeed have made the glass tougher, designing for the local conditions.
I am also in Edmonton. It's currently -41°c . I can't imagine ANY type of windshield that would survive boiling water being poured on it at these temperatures.
@@seancripps4897 I grew up there. When I was 30 I moved to Vancouver. At 49 I moved to Los Angeles. Though I came back to Vancouver in 2010 at age 59. Canada is a better place to retire. Now in a burb at the eastern end of Greater Vancouver it is a cold day. 0C with mixed snow and rain. But to address your message, I would not expect it to survive either. I do expect the Soviet designers of the Lada expected this to happen in Russia and made the glass so it could specifically handle this treatment. The joke for the presenter is to think how many western windshields get broken this way.
Did you ignore the fact that he talked about all the russky cars cracking along the bottom when you were warming it up...Ladas are probably the biggest pieces of shit ever made... ps putin should be in prison!
The windshield on this line of cars from vaz 2101 to vaz 2015, is not glued, but is installed on a special elastic band and has the ability to move there (thermal expansion), vaz 2121 uaz 469 and uaz 452 cars are used, including in permafrost regions, for example, in the same Yakutia recorded more than -70 ° C Thank you Google translator!
I'm in PG and wouldn't dream of doing that to any of my windows. I bet if he poured half way down the glass and kept the top portion cold the results would have been different
same. I had a car for 11 years and my parents used warm water (not boiling) and it NEVER did anything bad my parents decided to use water cause it's faster but also they are scared of scratching the windows if they use the scraper
Don’t pour it directly on it put it in like a gallon freezer bag and rub it on it the reason it breaks is because of something called thermal shock where the temperature changes so rapidly it pulls itself apart because it’s expanding/contracting so rapidly
I need the English guy over everything I’ve ever seen in Russian. Listening to him translate as the other guy talks makes the Russian guy sound so peaceful and cool but when I hear Russian people talk without a translated they sound so angry Lol
They aren’t angry. It’s simply how they sound. You have to make a conscious effort to think to yourself and go “they sound angry but I know that is irrational thinking so I will use free will and change my thoughts.” You are not your thoughts. You are not a slave to your thoughts. Recognize but don’t attach.
I'm wondering if the mass of the glass and the relatively small volume of water poured slowly simply isn't enough to actually heat the glass to the point of expansion stress? How about trying a boiling 5 gallon fast dump? This give me hope though .. I've been thinking of wrapping copper tubing around the exhaust manifold down pipe to heat up the washer fluid outlet. I like winter enough for play - but dorking about in minus 20 at 4 AM to get to work sucks.
It doesn't break because of the way the window is installed. Most newer vehicles use adhesives to hold the glass in place that don't allow for room for the glass to flex. The Lada uses a rubber gasket to hold the glass with room for expansion shrinking. Once again. Simple is brilliant.
I was a bus driver here in Scotland for 14 years, every winter I would defrost the bus windscreen just like this in -10 -15 and it never cracked the windscreen
@@keessmit8999 you are right and wrong. A bus windscreen is thicker, which means it's stronger, but only stronger against impact. Because its thicker boiling water is MORE likely to break it than a normal windscreen. This is the reason labrotory glass for heating liquids is very thin. This stops an expansion differential between the inner and outter walls of the glass.
@@keessmit8999 Only the surface of the glass is larger the composition of the glass is more or less the same .Glass on vehicles are heat treated cycle unlike glass on old windows in houses.
There are numerous factors to pay attention to when doing this, as typically the glass will break depending on the thickness of the glass. Why it breaks is called Thermol shock, the same thing can happen in glass tea pots if you having freezing water and suddenly pour boiling water into it. The materials cannot compensate for the sudden change in temp and shattering happens as a result.
Front windshield on 07 Nissan Murano also will not crack from rapid thermal expansion. If you think about it, in summer time, your windshield is boiling hot, if you wash your car and pour all that cold water on it, it does not crack either. It's designed to handle it
The second the water leaves the kettle, the air is so cold, by the time it reaches the window it isn't boiling anymore, it's still hot though I imagine. Need to check the temperature and humidity of the air in comparison to other places.
I always fill a pitcher from my bathtub because it comes out hot the fastest and fills the pitcher in 2 seconds. It’s good for people to see it for their own eyes - people think you’re crazy for doing this, but I asked the dealer if I could when I bought a new car. Thank you for the video!
It's that time of year where snow is expected in some countries so Its relevent for many people. I clicked on it because I thought the screen would crack when he was putting the boiling water on it.
You gave me a great idea on how to defrost my glass on the car after its been -33 all night. Ice like a rock, break ice scrapper so pouring boiling hot water on it will melt the ice away in about 10 seconds. great job!
Nothing would have happened either way. I know from experience. Drastic changes in temperature from cold to hot does not make avsolutely any difference in glass what so ever. Things change when you do hot to cold, in this case the glass would have cracked easily. This has to do with how big the jump in temperature is. Is way harder to get glass cold enough and water becomes vapor before reaching the desired heat. This is why cold to hot doesn't break the glass. But is easy heating up glass enough that even room temperature water can break it.
When I did this back in 85' to my 77' Alfa GT it shattered like someone hit it with a baseball..Next time throw all the the water on at once..It should work then, lada or not..
Here in Arizona when it is 120 degrees Fahrenheit and your windshield is baking in the sun, if you spray water from the hose it will crack your window. Keep up the great videos! Cheers from the USA!
Me too. I'm also Canadian and have done this in -40C weather many times when I'm running late. I don't use hot water though, I use luke-warm water from the tap (a little above room temperature). It is risky though, I've had damaged windows crack just from the defrosters. Be absolutely certain your windshield doesn't have any cracks or chips if you try this.
It usually does crack, or atleast weakenes the glass enough that it's going to crack when it freezes again or if a minor rock chip hits it. Glass can't direct heat that well. So pouring boiling water on freezing glass is not a very good idea. Pouring water on glass to get rid of ice does work, just keep in mind that any liquid tap water is already warmer than freezing temperature and will melt ice off your car.
I've had two cars I did this within the past and never ruined a windshield. This video confirms what I've observed as well. A quick way to de-ice the windscreen with no negative consequence.
Windshields are not a single layer of glass, but two layers with are bonded together with a transparent plastic layer in the middle. So it's possible that the middle layer is flexible enough to prevent the glass from cracking. If there is an existing crack or nick however, then hot water will make the crack grow.
Ive used hot water from the tap and I've never had a problem. As long as its warm it makes removing ice easy. Works well for Frozen locks and handles too
As long as the glass is properly tempered, and it is set in the frame correctly so that the edges of the pane of glass have room to move as the glass contracts or expands there should never be an issue. If the bottom or top of the glass or the edge of the glass is sitting solidly against the steel frame so that as it expands it has no room to move, or the glass was not tempered correctly then there is a risk of it cracking or breaking.
Nah you can do this with any piece of glass, cut a little square and try it. You CANNOT however pour cold water on glass that's been sitting in the sun. The physics is just way more forgiving in one direction due to glass's terrible insulating and conducting properties.
I've done this so many times on my old a s s car it didn't give a damn. It was perfectly fine. People were always saying ahhh you shouldn't do that it's bad for your car nopedienope but I saved myself so mich work and hassle every winter whereas they were freezing there finger off scraping their damn windshield manually.
why did you pour hot water on the no- icy windshield? I 've done in many time ago when I get icy windshield and it would take a long time scrapping and it never cracks in Wisconsin.
Not sure, but I think if he'd poured that hot water on in one huge splash, rather than slowly pouring it out, he might have gotten a reaction. That windshield represents a substantial overall frozen mass, so it likely cooled off the water immediately on contact, but if it had been, say a gallon of boiling water all at once, that would have maybe stressed it enough to crack.
well the cracking happens from repeated application of hot water the stress from having hot water poured on the windshield over and over is why the windshield cracks eventually the heating and cooling rapidly breaks it little by little and eventually you get a pop and a huge crack when it finally goes all together the heaters for your car can do the same thing if they heat up to quickly
Dr. Riq it’s actually weird for me because i can understand the language in the background too while being completely fluent in English.. and the background language Russian.. it feels like it’s too many words in total cause i can hear them talking in both languages yet being able to understand both.
It has solid mounts so no expansion. New cars have rubber mounts so i usually doesnt happen. Old trucks have had this feature forever. Depends on glass type as well.
