STEEL SEAL Head Gasket Sealer for 8 Cylinder Engines -

Toyota 4.7L V8 225k miles. Was bubbling (not bad but definitely bubbling 1 good sized bubble every 2 or 3 seconds) w radiator cap off. Building pressure in cooling system, actually blew COLD antifreeze all over me one morning after sitting all night, and the next morning, I popped the radiator cap, and the whole system was pressurized and sprayed me, the engine compartment, and half of my garage with COLD antifreeze. While driving actually blew off top radiator hose off while the wife was driving it (that was the last straw, as you can imagine) as it left her stranded on the side of the interstate (with an almost dead phone battery, you can imagine how THAT conversation went). Heater wouldn't work, or would work intermittently and coolish/warm air at best. Definitely a head gasket issue. Tried everything because was in denial about head gasket leak. New heater core, flushed, flushed, flushed, reverse flushed, acid flushed, did I say FLUSHED the cooling system. Finally decided to "bite the bullet" and make the decision to face the music of it being a head gasket issue. Called a few buddies and inquired about replacing the head gaskets. Quotes came in anywhere from $1500 to $3000. Much more than I wanted to spend. Saw some good YT videos on this stuff, and figured, with everything else I tried, may as well take one more "hail mary" before I bite the bullet and spend the big money to fix it "right." So,I bypassed the heater core, because it was brand new and didn't want to take the chance of this stuff clogging it, and I took out the thermostat, drained the entire system and filled it with fresh water, and put in 2 bottles of this stuff. Ran it at idle in the garage for about an hour, the temp never did get above the middle of the gauge (its winter and outside temp was low 40s). Didn't want to risk anything (with everything I had been through) by driving it, so I just idled it. After I figured it was as hot as it was going to get,I decided to shut it off, let it cool down a bit, and put the thermostat back in and take it for a drive. So,I let it cool for about an hour, and then put the thermostat back in, filled it back to the brim w water, and drove around town, up and down hills, and stop and go traffic and everything looked good, no weird temperature fluctuations, needle stayed right in the middle of the gauge. Came home, let it cool over night, drained the water, refilled it w water, and hooked the heater back up, and drove for about an hour in stop and go and up and down hills and again, the temp gauge was perfectly stable and the heater worked great. Let it cool down again, drained all the water, and filled it to the brim w antifreeze, and the wife has been driving the kids around in her SUV like nothing ever happened ever since, and has been about a month and a half now and about 1500 miles, and there hasn't been any fluid loss in the reservoir, when I pop the radiator cap the antifreeze is right to the brim and absolutely no bubbles when its running, and I would have to say, in my case, IT WORKED. Only question now of course, is for how long? But, for now the bandaid is holding, it got me out of a pinch, got the wife and the kids heat again, and I'm pleased with the results.

I did everything as it said to do and flushed my system and used nothing but water and 2 bottles of Steel Seal. Drove my SUV as the instructions stated and then parked it letting the motor completely cool down overnight. Then dain the system and refill it with cooling mixture. while steel seal was being ran through my motor it smoked like crazy out my tailpipe. After draining Steel Seal from system and refiilling with coolant and water it now smokes when I crank it and every time I get on the gas . This was a complete waste of my money and did not work at all like money back guaranteed it would

A Toyota dealership gave me a quote around $4,650 to replace the SEVERE blown head gasket.I was going to take the car to a junkyard when I discovered a YouTube review of Steel Seal and decided to give it a try in a last ditch effort steeped in utter desperation, and it worked:1* I completely drained the coolant system and closed the drain conduit.2* I poured in a full gallon of distilled water, followed by I a cup of Simple Green Pro HD heavy duty Cleaner and degreaser detergent.4* I turned on my Prius in maintenance mode, then turned on both heater and fan to max. I let the engine run for 5 minutes then shut it down.5* I drained the system again.6* I poured in 1 and a half gallon of distilled water to rinse out the system , then repeat steps 4 and 5.7* I drained, then rinsed the system a second time for with 1 and a half gallon of distilled water, then repeat steps 4 and 5.8* I drained the system and let the engine completely cool off. I gave it two hours just to be safe. After the engine completely cooled off, I poured in a gallon a distilled water followed by a bottle of Steel Seal.9* I turned on the car in maintenance mode, both heat and fan to the max, interior air recirculating and let it run for 30 minutes, using a timer.10* I turned off the car after the full 30 minutes and left the park overnight.11* next day, I drained the coolant system to get rid of Steel Seal and the distilled water and replaced them with regular coolant.12* Problem fixed. I drove 190 miles east to Wisconsin, then back, checked the coolant reservoir, it remained full and generated not a single bubble.I unequivocally stand by Steel Seal..

I got this product after seeing some reviews on YouTube and contacting the company. I really appreciated the personal touch that I was given which included a lot of details on how to be successful as well as explaining the simple warranty process should it not actually function as expected. 167,000 mi on a '05 F-150 XLT 5.4 Triton which was leaking into my spark plug sockets on five plugs which destroyed the coil packs. Initially I thought it was coil packs until I figured out that fluid was going into the well. This was a last-ditch attempt to resolve the problem and I was thoroughly blown away that it not only corrected the issue within 10 minutes but has been functioning for several months now without fail. I was able to get the truck inspected and have been able to use it since then without concern or question. I highly recommend this product and to those who have had bad experiences I encourage you to contact the company because they actually have an additional component they will send you at no charge to offset any failures. If that fails then they will give you a cash refund so what do you really have to lose? while it is an expensive alternative to what's available at the box stores, I would much rather have this and know that it works then gamble on the garbage off the shelf for $20.

Best $148.00 ever spent. If it last. I'm hoping for another 100,000 miles. I own a 2005 Tacoma 4x4 with 260,000 miles on it. The truck still runs great isn't overheating. We live in the rocky mountains where we have solid 5 months of snow. So keeping the Tacoma going is important. The head gasket replacement cost is around $4000 and up. I followed there instructions as close as I could. The only thing I could not do was unplug the #6 injector. I did remove the #6 spark plug. The bubbles stop showing up in the coolant reservoir. I drained the coolant. Filled it with distilled water and 2 bottles of Steel Seal. It had 260,000 miles on the antifreeze and probably what caused the head gasket to leak. I followed the "If vehicle is not roadworthy": After that I drove 20 miles. I was still getting bubbles in the coolant reservoir. I let it cool over night and drove it 32 miles to work. When I arrives I left the truck running and checked for bubbles. There were still bubbles in the coolant reservoir. I drove 32 miles home and checked for bubbles again while the truck was running. Still had some bubbles in the coolant reservoir. I drove 3 more times to work and back (64 miles) and finally the bubbles stopped. What I should have done to double check is use a burping kit to see if bubbles were still showing up. Anyway I drained the distilled water/Steel Seal, replaced the thermostat (did want the Steel Seal to muck it up) FYI the original thermostat looked amazing. Since I had a new Toyota thermostat I used it. I also changed the upper and lower hoses, new oem radiator cap. I used Toyota super long life antifreeze. I will update this review if something changes. Morally of the story. Use follow the instructions and leave Steel Seal in the system for as long as you can.Update 4/26/24: Amazing! Still running great No bubbles or antifreeze leak. I have driven the Tacoma 17,000 miles in 10 months.