Head Gasket Sealer

Here's the scenario: 2003 Nissan Altima 2.5 liter, 175K miles on it. Symptoms: Losing coolant, about 8oz a day, but no external leaks. Had a problem with heat going back to last winter - there is no heat when the engine is at idle, the engine has to be around 2K revolutions or higher to get heat from the heater core. This is because there is combustion gas constantly leaking into the coolant system creating a vapor lock in the heater core. Engine has occasional misfires in cylinder 3, I believe caused by coolant leaking into that cylinder. If the radiator is running under pressure the engine sputters and struggles to run at times - I believe because an over-pressurized coolant system is forcing some coolant into the engine. Setting the radiator cap so the radiator doesn't pressurize, the engine runs fine. Replaced both thermostats (yes there are two for some reason) and made no difference. Given those circumstances I was very certain there was a head gasket issue. Because of the high mileage I didn't want the expense of doing a head job, so decided to give Blue Devil a try. I followed the instructions on the bottle to the letter with these exceptions: (1). Idled the engine with the Blue Devil mixture in it for 80 minutes, not 50 as the instructions state. After letting the engine cool overnight and starting it, it was rough getting it going and it sputtered a bit at first. This led me to believe that the mixture may have bled into a cylinder while under pressure and the car not running. So: (2). I drove the car for 3 days, about 200 miles, with the mixture still in radiator and thermostats out, to give the pure mixture more time to seal any leaks. (3). After 3 days driving I drained the coolant down, keeping the liquid, put the thermostats back in, then added enough anti-freeze for a 50/50 mix. Topped up with the Blue Devil/water mix and bled air out of the system.. It's now been over 2 weeks since I used the Blue Devil, I've driven about 1500 miles including a day trip of around 400 miles. Engine runs great, there are no misfires, no loss of coolant, no excess pressure and there is ample heat from the heater core with the car at idle. So at this point, problem is 100% fixed. Blue Devil did the job as advertised and I'm a happy customer so far. This is supposed to be a permanent repair so real proof will be how it holds up over time, including the upcoming winter. I'm hoping to get 2 to 3 more years from the car, until the car I just purchased for my wife is paid off and I can afford to replace this one. I will update this review as time passes so keep tuned, but so far, so good! **UPDATE** - October 3 2016, going on 2 months and over 4K miles driving after using the product. Car continues to run great, no indications of any head gasket issues. I've driven the car on 2 trips, one 350 miles and one 750 miles at speeds up to 80mph. No problems and am getting better gas mileage on the trips than ever, 31 to 32 mpg highway. **UPDATE 2** - January 5, 2017 - it's now been 10K miles since using the product. Still no issues at all, no coolant leaks or loss, no air or combustion gasses getting into the coolant system. Prior to the Blue Devil repair, air/combustion gas would be trapped in the heater core meaning no heat inside the car unless RPM's were very high. Now there is no problem with heat, even at idle the heat blows strong. I'm sure results of using the Blue Devil Gasket Sealer may vary depending on the type and extent of damage to the head gasket, but in my case it has resulted in an effective and very cost-efficient repair. **UPDATE** - August 21, 2017. It's been one year, 21,500 miles and I've had no problems with the car at all. Running great, no coolant or head gasket leak. **UPDATE** - July 13, 2018. 212,000 miles on the car, 37,000 miles and 2 years since I added Blue Devil. Still no issues, not losing any coolant, car runs great. 2 years of driving this car on a 60 mile/day work commute plus personal driving miles. **UPDATE** - July 5, 2019. 233,000 miles on the car, almost 3 years and 58K miles since Blue Devil was added. A few weeks ago I noticed my coolant level was slowly dropping. No external leaks so it has to be internal. I've wrapped a paper clip around the internal radiator cap seal so no pressure builds in the cooling system, coolant level is now stable. There is no evidence of combustion gases in the coolant, however there may be issues developing, I will monitor closely. *Sep 8, 2018 - turns out a small bypass hose to the throttle body had a slow leak that dripped onto the transaxle housing and collected in a small area that evaporated before it dripped to the ground. The leak got worse and I noticed it, replaced the hose and now there's no coolant loss, so no internal leaks. Engine is still running good.

Bought my 1996 Subaru Outback Impreza new off the lot during its birthyear (96). Since then, it has taken me through a dozen or so states, two wives, two kids, two dogs, five cats, and around 75 chickens. I've hauled trailers, firewood, camped from and lived out of this vehicle (the latter being a temporary homelessness between graduate schools). I had the head gasket replaced after around 140k miles ... about 15 years ago, and over the past year she wouldn't start again after running without a 20 minute rest. I've basically rebuilt every pump, filter, belt, and other doo dads myself, but a head gasket is beyond my ken. I should also mention I coated the vehicle with two layers of black semi-gloss housepaint after 200K miles ... she's not much of a looker but has always gone forwards and backwards, all the windows still work, as well as heat and AC ... When she started overheating like mad three months ago, I took her to my local mechanic who said he could do the head gaskets for "cheap" at around $1600, if he were to do it right and machine the heads. The car is worth less than $400 on paper (the tires are literally worth more than the car), but ... it's like putting down your favorite dog. I got to shopping for a new/used Honda, drove my motorbike to work for a few weeks, and prepared myself for the worst. THEN! I stumbled across this magical fluid, which still seems too good to be true. $50 for a functional vehicle? I figured it was worth a hail-mary, and had some delivered. While waiting for its arrival, I did tons of research - the odds seemed about 50/50, but worth a Saturday afternoon given our history. I followed instructions EXACTLY, flushed the radiator, etc., pored in half the bottle, ran it for 45 minutes and prayed for the best. Next morning she got to work, but just barely - I had to run the heat full blast to keep it from blowing up, and the radiator reservoir was bubbling over like mad (not a good sign). I came home despondent and wondering what the chances were of me doing a head gasket repair in my driveway ... ran across some reddit threads, and followed some random advice that said sometimes it takes more than one application. So without even removing the thermostat, I chunked the other half of the bottle in the radiator and figured it couldn't hurt at this point. Ran it 45 more minutes and ... The next morning she made it to work without overheating at all! And over the next 3-4 days, she seemed to be running BETTER every day! Lo and behold, the thing will now crank up every time without a cooling period (I have NO idea how it fixed this issue, but don't really care). After a couple months, it started to overheat just a tad bit and didn't restart for ten minutes while running errands, so I got another bottle, dumped half into the radiator, and ... viola! Hell, even if I have to toss a bottle in there every three months or so, that's $20 / month, which by my calculations is much cheaper than a car payment, and I get to keep my OldBaru :) I ended up buying a 2023 Honda CRV for highway / roadtripping, but purchased a cover for it & it sits under wraps in the driveway for 2-3 weeks at a time, as I keep the miles off it by rolling in the Subie whenever possible. Thusfar, I've had her on the road for up to 90 minutes with no problems, but I'm wary of taking her out for much longer, and don't need to anyway with the Honda in reserve. Long / short - this stuff actually works, but you may have to tweak the directions / application a little bit. It's a win-win if, like me, it's either the magic fluid or the scrapyard :) Good Luck!

I bought this product summer of 2014 when my 2004 Toyota Matrix XR (1zzge) engine developed a head gasket problem (burning coolant [exhaust moisture + sweet smell], but no coolant in oil or oil in coolant). I had a few minor overheats due to a cracked radiator. but this engine has a weak head prone to warpage. I had recently had this engine rebuilt and could not afford to do it again. I was getting by for a month by refilling the radiator every 10 to 20 miles, it was a slow head gasket leak. I didn't think this would work but it did. I have put 20k miles on the car and its holding strong, I have even used the Matrix last week to Tow a 2,400 LB BMW with no issues. So here's how I used it; I took out the thermostat, but left the rubber gasket and reinstalled the housing (it is a pain in the butt on my car, but it worked). I emptied all the coolant and flushed it with water. I read online the red devil can react with coolant so we have to clean out the system. I bought peak cooling system flush and mixed it with straight water per the instructions and bleed the cooling system, Do yourself a favor and get the "Lisle 24680 Spill-Free Funnel", I was broke and spent part of that weeks food money on it, but so worth it! It really is spill free, and spills are the last thing you want when the blue devil is about $50 a bottle. After getting the air bubbles out I took it on the highway for 10 min to let the engine heat up and let the cleaner do its thing. I then flushed it with water about 3 times to get all of that cleaner out of the system, I was shocked at how dirty the water that came out was, These cooling systems need flushing. Next I drained the system and put the plug in, I added some distilled water (1/4 gallon) then I used about half of the blue devil. I continued filling the system till it wouldn't take any more. From there I started the car I topped the system up as needed. Once I had enough water in the car (i checked the capacity of my system online), I put the radiator cap back on to build pressure and reach operating temperature. I ran the car for an hour or hour and a half, what ever the blue devil instructions said. I noticed the exhaust vapor had stopped, I needed to get to work that afternoon so I gave myself extra time and baby-ied it all the way there. I took it real easy the first month, still carrying about 6 galons of water at any given time. Two months later I nearly had a breakdown when I lent it to a friend while I was over seas and he said it refused to start the day before I got back. It was just the starter : ) . I know its difficult to believe a sealer can repair a leaking head gasket, but It worked for me, If I can get 4 more years out of this car I'll be happy, It it starts leaking again ill just use red devil again. On a side note red devil is not made for all cases, that BMW I was towing had blown a gasket too, I was tempted to use the product! But I knew that the leak on the BMW was much worse with pooling coolant in some cylinders. For a larger leak like that I would not want to rely on a sealer for another family member's daily driver, yes it could have worked, but BMW's are a little more delicate (temperamental), and I don't mind doing a head gasket on the BMW since that car has less than 100k and will retain its value better than our beat up matrix. In 2018 I sold the matrix, It still ran but after towing an suv started smoking again. The blue devil got me the time I needed out of that car, several more years till I could gain some traction on a career; for me it eventually let go. I was however pushing the car beyond the manufacturer recommendations, so I can’t blame the blue devil product. If you have the money it’s no substitute for the actual head gasket. If you don’t it’s a good bandaid till you can pay for the fix or replace the car.

I have been working on my own cars since I was 21 about 12 years ago. I have swapped and built engines. My honest opinion is avoid this stuff like the plague. It's a temporary solution to a permanent problem. You may be the lucky one that has a small gasket leak, but you may be one of the many (just search engine the negative results and you'll find some on Youtube) that has larger problems. This stuff works as it says, the problem is when you have more than a head gasket leak and it goes into those places and chemically welds other things in place, LIKE YOUR PISTONS. I have a seized engine that will not turn over, which is no issue because I have another one to replace it (FYI, if you intend to keep an engine do not use this; this is a last resort as it could result in having to junk an engine - because it's just cheaper - as it will chemically weld on all the internal surfaces in the engine if you have more than a gasket leak). The only way to know if you have more than a head gasket leak is to pull the head off in the first place. By that time you've already gotten far enough to replace the HG, and found any other issues that need fixed anyways. If you have an HG leak you might have other issues, as I did. My application is a 4.0 I6 Jeep Cherokee engine. It has either a cracked head or cylinder wall in the 6th cylinder which is not a common malady. I thought it was just an HG leak only since I could see a visible leak. I decided to investigate mechanic-in-a-can solutions and determined BDP's HG sealer to be the best option. I now have a fully seized engine that I can't remove from the transmission because it requires turning the crank to be able to get the bolts off of the flywheel so it will come off of the torque converter (the TC turns and locks 3 separate times into the transmission, it doesn't come out until you have the engine out of the way). So you see I have a serious conundrum, especially since I am not junking that transmission with the engine since it is a brand new remanufactured transmission. BDP has opened up a serious can of worms for me beyond my wildest dreams. I will never use this or any other chemical in my coolant system to stop a leak. It's a temporary (for me it was VERY temporary) false sense of security. The leaks stopped, but one day at work I had to make some long trips after a few weeks of having it in and the entire coolant system bled out. The way the thermostats in these engines work is if you don't have any coolant it will be an extra long time before it registers the heat since it is at the very top of the engine. It's the last spot for heat to spread too. So as soon as the gauge jumped to the right and sounded an alarm I pulled over, by the damage was already done by then. UPDATE: It's later today (12-17-2017). I got the head off of it. I'm going to give you 6 guesses which cylinder Blue Devil sealed up for me but you're only going to need 1. It also plugged up 1 of my catalytic converters. Ultimately this all was the result of a not-completely-tightened head bolt in the very back of the engine (I found out as I was un-torque'ing all the bolts). It was practically loose. I didn't bother checking them when I put this engine in last year because when it came out in 2014 it was a working engine that never had any problems. I bought it from a guy in Ocala in 2012 when I came home from Afghanistan for 2 weeks. I later on found some janky stuff they did in the suspension, sound system, and failed attempt at installing the snorkel. I imagine the original head on this engine cracked and they either replaced it or they bought a broke down jeep, got it running, and then turned around to sell it for a profit. Regardless, it ran fine before so I didn't bother checking the head bolts. If I would have the engine damage could have been completely avoided. Blue Devil would have never fixed this, but I wouldn't have found that out until I took it apart anyways. This is precisely why I say buyer beware. The only sure way to know whether or not BDP is going to fix your problem is through a leak down compression test which will pressurize the cylinder and reveals all the leaks. If you have leaks beyond the head gasket BDP ain't gonna help, unless you need something that will temporarily hobble you along. The picture with the snow is the buildup of BDP. It was like pudding, but it only seals hard in the oxygen exposed areas where there's iron or steel. I cleaned it all out and PB blasted it. Hopefully I will be able to turn the engine over so I can get the transmission disconnected from the engine so I can get it out finally. UPDATE - 12 -18 - 2017: Letting PB Blaster sit in the cylinders for two days I still couldn't break the pistons free (I did this last year after letting it only sit for a night and it broke up all the rust). Cylinder 5 was mostly rust and I could tell the PB blaster was working in there because the amount of fluid drained down low. Cylinder 6 with the BDP treatment stayed sealed to the cylinder walls. Trying to turn the crank by the bolt was stripping the bolt head and using the crank puller bolt holes with bolts in them was actually bending the bolts when I tried to use them for leverage with a breaker bar. Finally I resorted to the last resort, a sledgehammer right into the pistons. If I had any intentions of rebuilding the engine that is now completely out the window. Pistons are damaged as well as the cylinder walls. Pictures enclosed. Stay away from this stuff and get the work done by a mechanic. This is coming from a DIY person that does all of his own work and is all about saving money. This just costs you more in the long run and isn't worth the toil. Blue Devil will seal the deal on your engine's eternal destiny as it sucks it down into the junkyard pits of hell.

2006 Chevy Equinox 3.4L VIN F, blown head gasket most certainly, exhaust gasses getting into over flow and bubbling, burning massive amounts of coolant (white smoke), exhaust gases pushing through engine coolant jacket not allowing coolant to flow through the engine. 1st purchase I pour the entire bottle into the overflow and hoped it would work which it did not. Not the smartest idea but thought it was the only option. 2nd purchase, 2nd attempt to seal, I unscrewed the 10mm bleeder screw entirely and used a funnel, pouring the entire bottle into the bleeder screw hole (above the water pump) and filled the rest with 1/2 gallon of radiator fluid and started the engine. Dumping the BlueDevil there allowed it to go straight into the engine's coolant jacket and seems to have sealed the leak from what I can tell its about %97-%99 better than it was. I don't see any white smoke burning, and my car isn't overheating now. Worked better than the k-seal in my opinion. This BlueDevil the first attempt though I feel like started to set up in the radiator overflow. After my very first attempt and letting the engine cool down i came back to the radiator overflow seemingly filled with semi-hard white stuff basically like wax. As well as after the 1st attempt, before my second attempt, since the car was still overheating i took the thermostat back out to see if it had clogged, keeping it from opening, there was some of that white stuff solidified around where the thermostats base sits, had to scrape it off with my fingernail but i don't think it would have effected it too much. The waxy radiator overflow deal was odd though, and i can see it possibly ruining an already old water pump. 4/5 stars because it worked, just had to do it a few times, and different ways, and it's super expensive, and could possibly make things work if you aren't careful.

I purchased Blue Devil head gasket sealer and blue devil 3 in 1 radiator flush for a blown head gasket in a pt cruiser. Firstly I am capable of changing the head gasket, but am a single parent to two young kids and don’t expect to have that kind of time until they’re older, so I rolled the dice. The radiator flush is required for making sure the surfaces that need repaired are clean. This gives the sealer a better chance if “sealing” and should help the repair last longer. It’s application was simple and should be possible for anyone to do. However I was concerned about the 20 mins of idling. I didn’t need to be. Now the instructions for the sealer seemed a bit much until I considered what it was for. My car required removing the thermostat housing and since the thermostat gasket is what sealed the housing I had to use the gasket. My system uses 2 gallons of coolant so I first poured in 1 gallon then half the bottle of sealer and topped it off with regular water(I didn’t have any distilled). I did this with the engine off because of how bad the leak was. 50 mins of idling seemed like a lot for something that would overheat in 20, but the temp never went above normal. As per instructions after the idle time I let it cool off and then reinstalled the thermostat. I was presently surprised how little liquid the vehicle had used during the idle time and thought that was a great sign. After the coolant got topped off I had to drive a lot further than I had in a long time, and the temp again never went above half way, but what did surprise me was the restored fuel efficiency and performance(gutless car to begin with so any improvement is noticeable) as well as how smooth it ran. I am now a believer. Considering it’s been less than 24 hours I cannot comment on its life span, but will if it fails. I don’t expect it to. I’m hank you!!!

I have a 2006 Nissan Altima that I bought for $1200. After a few months of use, I find out through my mechanic that the head gasket is blown and the previous owner tried to hide it. The car wasn't overheating but it had trouble starting and released tons of white smoke from the exhaust. At some point the car wasn't accelerating smoothly, I felt like I didn't have as much control of the car so it was risky to take it to the highway. I tried this solution, as fixing the head gasket would cost me more than I paid for that car! I had nothing to lose at this point so I tried Blue Devil. I've driven it for one and a half weeks since, and so far it's been driving better than ever! It starts from the first time every time, it drives smoothly, no more white smoke, and the check engine light is gone too! I took it to the highway too with no issues. When I had the car running for 50 minutes, the fans were blowing cool air even though I set it to max hot. Blue Devil did it's job so far, and I only pray to last me for another year because I use it to commute to college. If you are in a situation like me, I highly recommend this solution before selling your car for parts. I followed the instructions precisely so I didn't use the entire bottle. If the car will start having issues again, I have enough for another use. UPDATE: Car died after 2 months. It started acting worse as I needed the car less often. Probably if I started the car daily it might've lasted longer.

What a lifesaver this stuff is. I have twice now had the same problem with combustion gases entering my coolant on two separate engine rebuilds on my classic Ford collection. I believe I am to blame ultimately and unwittingly caused the block deck surfaces to be less than true with the use of a 3M Roloc bristle disc. I think the green ones are just too aggressive, and left small dips in the surface that were hard to see or feel. In both cases, my engines ran fine, no signs of coolant getting in the cylinders or oil/coolant mix, but I’d get creeping temps on sustained high-RPM driving on a highway. A block testing solution turned color and confirmed my suspicion. I followed the instructions to the letter and in both cases, this completely cured my issues. I’m confident this will be a long term repair, especially since the small void tha lt was allowing gas to escape had to be extremely small. This stuff saved me a ton of headache and teardown. I now know to try to avoid this issue altogether by using a different prep medium, but what a save. 100% recommend!

Funcionó bastante excelente, hay algunos trucos que quizás no sea recomendado o tarde más pero pueden ayudar a que sellé mejor, como esperar a repose totalmente un día con el líquido aún en su interior y volver a repetir el proceso, esperar a que enfríe totalmente (unas 3 horas) y ahora sí hacer el cambio a antifrezze

This product worked for my car that has a leaking/blown head gasket. BUT this is NOT a permanent fix!. It lasted 1 year, the first time I added this to the water. So had to purchase this item again to repeat the process. This item came in a much bigger bottle so you only need to use half of it. It is very easy to use, Just follow the instructions on the back of the bottle. But one thing I didn't bother doing was removing the thermostat before starting the job, I just emptied some of the coolant from the bottom of the radiator, so to leave room in the water system for the Blue Devil liquid when pored in. It worked 100% for me on my Rover 416, year 1998 It may not work for all, but I suppose its worth ago to save the hefty price of paying for a new head gasket ? No complaints, only praise = 5 stars

My car is Old AU Ford 2000 model Ute , Australian made and one day I checked my water level and I forgot to put the lid or cover back . And I was driving for 3 days delivering goods and the sudden steaming coming out from the engine , when I opened i was shocked and I pour water in and since then leaking radiator plus loosing more engine oil and my friend told me to older Blue Devil . We follow the instructions and now my car back to normal , Blue Devil is real devil and Awesome

10

will use it eventually