I never believed in this stuff. My dad used it once like 15 years ago and he had a blown head gasket. The fucking thing still takes him to work everyday. I still dont have alot of faith but it worked that one time 😄

It’s good stuff to get someone by who can’t afford to pull the head and fix it properly. I’ve seen it work for many years.

Seeing a lot of comments about how hard a head gasket is. Yes it is a difficult job, but learning to properly repair your own vehicle gives you a sense of pride. Sometimes even the potential for a career to fall back on

My friend used a stop leak for his radiator on a 2008 Buick Lucerne same brand, Blue Devil, i had no expectation that it woukd work. While the engine was running steam was coming out of the driver side of the radiator. He let it idle for a while and then drove it for a couple of hours........it worked, doesn't leak a drop now. 4-18-24 update, it started leaking again after a month or so.

I usually pour it all in I have used it on more than 400 occasions you have to remove the thermostat turn the heater on High full blast and I have had great results I've only had one or two cars come back I have used it since the 1990s and some of them cars are still going today

I have always said that there is no mechanic in a plastic bottle or can. But there is a genie mechanic in this blue plastic bottle. For I was going to take out the passenger head . The night before I was to do this unwanted work, out of the blues a great mechanic of my dads best friends R.I.P. to both of them . Said to use the blue Devil repair and it worked ! 8 years have passed and it sealed it for good !

Used the same stuff in an e350 box truck, it had a thick cloud of white smoke behind it. Tried it out and it worked beautifully. The fans started blowing out hot air after about an hour. Worth every penny and then some!

In my experience, the only time I have used this was on a 4.7 AWD jeep and it worked. My dad daily drove it for 12,000 miles then we sold it. To this date it still runs because I see it around. 😅

And now it's ready for sale 😭

Mechanic HATE that crap.... when the vehicle needs the head gaskets replaced for real, they will curse whoever used those fake repair liquids.

Blue devil is a great product! It saved my Jeep, and lasted another 20k miles. I'm getting ready to do another treatment tomorrow

I usually pour all of it in I have used it on more than 400 occasions and have mostly good results I've only had one or two cars come back

I guess everyone hear has plenty of resources to buy a new car or thousands of dollars for repairs. I have a work Van with 100k plus miles on Blue freaking Devil

That's like covering skin cancer with a band aid.

Blue devil.... I did that to my 86 Isuzu rodeo on its last legs. I followed the instructions. It worked. But I was planning to buy a new car. A last ditch fix.

Then drive straight to the dealer and chop it in for a new car!

Ok. Just had a kubota overheat and was blowing massive amounts of coolant out the tail pipe. Installed this stuff and so far so good. I was really amazed.

Oh the engine is leaking fluids?.....some fluid should fix that.

This stuff works I put this in a Cadillac and it fixed it if you follow the directions it will work

I love the example car you're using as a Dodge neon which is notorious for blown head gaskets

Do what it says and it will work. Wait the full 45-60 mins and it does the trick. Works well to buy you time before you fix the head gasket properly.

I have done this many times and it works

Scottie Kilmer did this but you have to remove your thermostat first flush your system good fill up radiator fresh water 💧 start up vehicle turn on heater full blast get up to temp then slowly pour in the blue devil additive and put cap on land go out and drive for 30-to-40 mins. Then let sit for 24 hrs .

And 53 years of mechanicing I never saw Voodoo in a Bible fix anything

Used it once on old van and it worked👍

Gas to high for 50mimutes

In 50 minutes I could have the valve and block off to remove and replace the head gasket and 30 minutes to put back together on a 4 cylinder car. A head gasket and new valv cover gasket maybe $50 total. If it over heated and cracked or warped you need a machine shop to Magna flux any way

I tried this one two different engines. I followed the instructions perfectly, and it lasted maybe 2 miles.

And next, we have a fix for a thrown rod...in a bottle

That really works I put it in my Toyota and it’s been running. I had it for five years.

Ground pepper works too

I just did on my accord 2019 I will update later

Just stumbled across your short. Mechanic in a can. An interesting experiment would be to buy a vehicle with a known blown head gasket. Use the product, prove the gasket isn't leaking, take the engine apart to see what failed and what the product did to stop the failure. You got a new sub.

It works fantastic to seal minor head gasket problems. But it also destroys the rest of the cooling system with gunk. Love the product but if you can afford to fix it the right way do it If not go Blue devil.

Used it on a both my 3.8 1996 and a 4.6 1995 ford thunderbird lx ‘s and the head gasket sealer is why either car saw over 200k. Lasted me about 1 1/2 years as a doordash driver and I put 80k miles between those things and made $40,000 on food delivery. Might not sound like much but as a 20 year old college student who paid $700 and $1400 for the cars respectively, I say it was definitely a big Win for me as I was able to take some of my savings and sell of both cars for a 2004 Mustang Mach 1 ($12,500 66k miles, got a good deal on it)

I used to use eggs but nowadays they are sooo expensive

I'm not a mechanic yet I start school in a couple of months. But I've been working on my car since I got it in 2019. I DO NOT RECOMMENDED ANY QUICK FIX/TEMPORARY FIX it will cost you 10x more later.

The idle for 50 minutes is a red flag.

It works just have to follow directions and depends how bad your gasket is damage if you can’t idle your car at least 50 minutes then it’s not for you. I ran my car for about 3,000 miles no issues so far

Use Bars Leak Permanent Head Gasket Sealer, the one compatible with all antifreeze, pour it in with your coolant and you’ll see results in a day, used it on My 2016 charger and the overheating went completely away. Not sure how long it will last so I left the remaining solution in there in case the crack rupture so far so good

Honda has over 200,000 miles. Runs good, except consumes coolant. Made little sense to change the head gasket without installing a new or rebuilt head and timing belt. Too much time and money if there was another way. I used Blue Devil. At first, I thought it didn't work. Coolant level was still going down. But then (wasn't keeping track of the mileage) one morning, the level hadn't changed. Then a few mornings later (I check every morning) the coolant level was touching the cap. Right where it should be. Will it last? Dunno. But for now, feeling pretty good about Blue Devil.

I would wait about 2 weeks. If the vehicle doesn't overheat, or the check engine light doesn't come on for a misfire, I would do a compression check. If all of the cylinders have great compression in all 4, 6, or 8 cylinders. If the compression is the same in all 4, 6, or 8 cylinders Then congratulations you have bought some time until you have to do a head gasket replacement. I just did a head gasket replacement job in a Corolla. The car runs super smooth.

A head gasket repair usually requires that the head or the block be restored to flatness with a surface grinder. It’s not cheap.

This stuff works great. It plugged up all the small holes in the radiator and everything

There is but one thing to do after you pour this in and that thing is drive it to carmax

Looks like a chrysler product of course. I recognize the plug wires from my old neon

Just pop a new gasket on! Never trust a mechanic in a bottle!

Yep. It does work! I'm one of the lucky ones that did function.

That stuff does work. However , only under normal load. If you are like me and drive sports cars and turbocharged supercharged engines at high rpms then this eventually cant beat a headgasket or a machined head(cracked block).

Sodium silicate. Works best if you remove all traces of antifreeze run at operating temperature with the silicate then drain with the system open to air overnight.

Blue devil worked for me. I had an oil leak problem and white smoke was coming put of my tailpipe. It fixed it and never had that problem again.

No Cap.....this Blue Devil seal really works...I used it differently from what he did..but it worked on a Mercedes 230... I treaded mine 4 days in a row...letting it run then turning it off....then changed it after the 4th day and had no problems after

I've used it , it really works !! Toyota V6 3VZE

02 f150 coolant crossover gasket leaking gotta take the whole intake off but i used this stuff and no leaks 6 months later.

It works i did on a 6 cylinder ford

done it half dozen times. If not too bad, it might last awhile but often it's literally a couple days till failure. It'll make a mess of your radiator. I would not wanna make a road trip in a car "repaired" this way.

Had this happen to me... Bought a car and changed the coolant and found out the hard way

This is probably good enough to get you home. Replace the gasket, no monkey around with additives if you want to keep your car.

I have personally used this exact product there are many more steps involved here read directions u can also call them directly it worked for me if indeed I had a blow head gasket that was 5 years ago my car is still running good with that being said I think it was my water pump had a slow leak and the product fixed the leak since then my water pump failed and I had to replace my timing belt do your research with these cheap fixes Good luck tubers

If you got a blown head gasket I guess try anything that might help. But I can’t see myself adding anything to the engine besides oil but that’s jus me. I worked for a company that had 5 foremen with 5.7 Hemi trucks that they let idle with the AC on for 8 plus hours everyday btw and not one ever blow a head gasket doing it. But do what you gotta do lol. But I’d recommend for the 5.7 or bigger don’t let it get to this point. Do little things to keep your engine cool if you got a heavy foot like me if I drive more then a hour in summer when I get home I always open the hood let the heat out let the vehicle sit in park for 1-3 mins before you turn the engine off and the last thing I do is turn the key to on and turn the heat up on the floor. Engine still off and let the heat blow out the floor vents for couple mins. Trust me it helps the plan is to prevent blown head gaskets is why I do what I do

I fixed an external leak on my impala with the ac delco pellets. Found that gm put them into every vehicle at the factory prior to dexcool.

Beware this can ruin your water pump. I believe you should take out the thermostat. Used last night. Customer brought to me. I poured it in very slowly. Same as you. Idle for 50 minutes. Started to leak at water pump and started to over heat. Why would it make a leak? If it is to stop leaks. Smh I believe it fixed the head gasket. But it made another problem. Now the waterpump is leaking. Vehicle has no heat. Car had no coolant leaks. Just oil getting into the coolant. Did it exactly as you described. I did notice it hardens up like a rock. I believe it got caught in the water pump. Brand new water pump also. I dont see oil getting into coolant. So it took 1200 job turned it into a 350 job. I hope its not temporary.

How long after you use it can you tell if it worked??? how long will smoke?

Temporary fix until it’s time to repair the blow head gasket, it’s only hiding the major problems

Best way to fix a head gasket, is to change the head gasket.

That shit becomes rock hard and plugs the heater core and thermostat ass soon as it gets hot .The instructions say different pause and read. Remove the thermostat and do it cold.

People should do this for preventative maintenance 😂

That's temporary and for small leaks. Won't work if you already overheated and the head is warped.

I’ve sold thousands of cars with this product really good stuff.

Then slowly change your heater core water pump oil cooler and radiator

Many years ago I used this, to be temporary fix, but that sh1t did the trick, drove my service truck for a couple of years more until I finally bought another truck, it never failed maybe I did followed the instructions to the t 😂

I used this in a pinch one time. It worked for about a month.

This stuff does work. If you flush the system good before using. And it doesn't clog up. I've used it a few times. But it's not cheap to buy.

I think for the most part, these head gasket fixes are temporary to give you some limited time to get ready to either change the head gasket or replace the engine.

heater cores replacement can take 8 hours to do,you can do a headgasket on a inline 4 cyl in just a couple hours,hell older honda can be done in under a hour on the side of the road

Dude, I totally saw the new head gasket and mechanic with all his tools come out of that bottle. Wow!

This is what I'm doing right now to my truck Ford F-150 with 302 it's slowed the leak down within five or six minutes and it's completely stopped after 15 minutes no more coolant leak.. my only big question about this is what happens when you get done with the last step do you have to let the engine cool or can you just straight up start driving it after that?

Do you drain everything out first

In that 50 mins I could have changed the gasket and hand decked the head head with some hi grit sandpaper and a flat surface or sanding block.

Hope it works good luck y’all !

that's not a repair, that's a bandaid.

If your about to sell car for scrap, might as well try at least cheap version of this stuff. Works best on Toyota for some reason or smaller engines. The first car i did this to a Corolla was blowing crazy white clouds. It eventually worked and put another 150k on car before something else went. I also had success on a toyota 4 runner v6. I tried on 3 American cars with v8 engines and didn't even help even a little. I think they create too much pressure!Actually made it worse and some types gets messy. You can clean out when doing head gaskets. Most importantly gotta take thermostat out, let it heat up to normal temps, let cool all the way down, repeat up to 10 times if it gets better each time. I had a equinox head gasket start to repair but ultimately didnt hold up because of type of gasket failure. That failure was allowing hot exhaust gases in the coolant. It was just too much pressure for it to handle. Had to just fix the right way. If you got a 4 banger or a inline 6 just read a manual and fix right! Their not near as hard to do as a v6 or v8 with two heads. Even if only one side blows, do both head gaskets. Always check heads if their warped. Get milled if they are. Some places will do for 50 a head, other places want around 100 a head but if you do this extra step it will help make a better seal! I do think if you have a nice car, you should just fix the right way! If your in a beater trying to get every last mile out of it before junkyard , i say go for it!

What if you don’t have a coolant leak but an eternal oil leak and you’ve changed your valve covers and everything? Isn’t Blue Devil for the coolant system?

The only time I’ll ever do this is if I knew I was going to replace the engine and I just wanted to make it home/safe place.

Might want to get some head valve sealant as well.

Will this work with your heater core bypassed and plugged ?

works ok for about 10k miles give or take and often clogs the radiator

Can this be done with out the car being turned on ?? Someone said it could but the directions say otherwise.

The instructions read remove thermostat, is this necessary for de??

All of the little vent holes and coolant ducts get gunked..Therefore restricting and reducing proper coolant flow..

So question my 2009 G5 2.4 VVT got hot won't start so how do I use this if it won't start

Magic in the bottle.

Lol. Works every time!!

hello my car reservoir always decrease but radiator is full why? i replaced gead gasket still same. radiator cap faulty?

Funcionó de maravilla y el carro todavia sigue con el nuevo dueño, lo único que hice fue cambiar el motor, es excelentísimo.

Use the stuff in the clear bottle that looks like gold liquid with honey in it , it works, pour and drive it

It does work

The only thing that fixes a blown head gasket, is headwork and new gasket.

MIRACLE IN A CAN...!👀

Believe it or not that stuff works on a small Gap in your head out of blown head gasket a leaking head gasket but it does run around your radiator forever too but it worked on a little Chevy pickup truck and S10 85