HG-1 HEAD SEAL Blown Head Gasket Repair

I have a 2007 Toyota FJ Cruiser, this review is going to be detailed with my problems and solutions. Just know as of today (9/6/25) My Fj is running great with no problems after using the Head Gasket Sealer (put in my vehicle on 7/21/25). *** Jan. 22, 2025 (OD 241030) - My FJ out of the blue started to have a rough start and 4 warning light came on. It was pulling code P0306B Cylinder #6 misfire. The mechanic said I needed a Tune Up, so we replaced the Sparkplugs and did an oil change. Problem stopped. *** Feb. 27, 2025 (OD 241893) - Really rough start, engine shaking, stopped after 1 minute, drove to work. The Engine seamed to pulse, like it was having a problem with fuel. While driving home 4 warning lights came on, then the engine light started blinking. The whole car started shaking, and I was unable to drive faster than 30mph. FJ was in "Limp mode." Had it towed to the mechanic the next day, where it started just fine, no lights, no shaking - NOTHING. Mechanic drove it for 3 days, and NOTHING. So when I got it back, I went to the desert, drove in 4x4 for 8 hours - NOTHING. Did 80mph all the way up the HWY 8 Grade (SanDiego) - NOTHING. At this point I think my FJ is possessed! *** all of March - no Problems! *** April 1, 2025 (OD 243193) - The rough start and shaking is back, drove it straight to the mechanics. Pulled codes P0306 and C1201. "Pressure check cooling system for possible blown head gasket and inspect cylinders. Wire borescope found #6 cylinder getting coolant inside cylinder, possible head gasket, need to remove heads to inspect." SOOO after being told it was a possible head gasket, and being quoted almost $5000 to fix it, I went to a new Mechanic. *** During this time, the Warning lights would turn on and off, some days it would start just fine, some days it would shake like crazy. I never saw a decrease in Gas milage, or white smoke from exhaust. *** April 24, 2025 - Finally dropped off for inspection by new Mechanic. He didn't think it was the head Gasket, after telling him the symptoms. Lights were on, pulled code P0306. The new mechanic, pulled the fuel injectors one was corroded. Swapped that out, cleared codes. Warning lights stayed off for about 2 weeks. Then would come on for a day, then shut off for a week. Some rough starts mixed in. *** June 4, 2025 (OD 244033) - Added coolant to radiator reservoir. Lights keep going on and off. Took it back to the mechanic, still pulling code P0306 and we decided that yes it had to be a blown Head gasket and that it would be better if the engine was replaced. He looked for a new engine, that was going to be $5000 plus labor. I decided to wait a little, and went out of town. *** July 14, 2025 (OD 244722) - Lights came on and stayed on. I spoke with another mechanic and he mentioned a head gasket sealer. That is when I started to research different products and came across "Bar's Leaks HG-1 HEAD SEAL Blown Head Gasket Repair." My FJ seemed like a perfect vehicle to try it on, it wasn't over heating, there was no white smoke, it was using a lot of coolant, it started fine most days. So I ordered it up! What's the harm in trying something for $35, the worst thing that will happen is I will have to replace my engine (which I already need to do). If I can fix the problem for $35 and get another 10-15k miles on my FJ, I will try it! *** July 21, 2025 (OD 244918) - TODAY WAS THE DAY! I read the directions 3 times to make sure I did it correctly, I wanted to make sure that it worked and I got the best result I could. I will say that I did need to drain some coolant from my radiator, as it was too full to add half a bottle of the Sealer. So here goes nothing! Put the Sealer in, Started my FJ, Turned the AC off, and the Heater on HIGH. It took about 40 minutes for it to get to temp. Turned it off and let it cool for almost 2 hours. Started it back up and did a 15 minute lite drive keeping the RPM's between 1500-2000. Cleared the codes and shut it off. Turned it on the next day, No lights, No shaking, No smoke, no weird sounds - NOTHING. Did it work!?? I think so (fingers crossed)!!! *** Sept 6, 2025 (OD 245875) - I have driven almost 1000, I have gone 80+mph, driven for over 2 hours straight - and everything seems totally fine!!! As of today, I will say IT WORKED PERFECTLY! It looks like a $35 fix, just saved me over $5000 and that is amazing! If something changes, I will update my review. But right now, I recommend this product to anyone that has a high milage car with a blown head gasket. It really does work and it works well!

Water pump failed and car overheated. Repaired water pump and all went well for months. Didn’t have signs of a blown head gasket for months. Car started overheating again. No other signs of blown head gasket other than overheating. My friend looked at my car and said must be a blown head gasket. I took it to a shop and they wanted $4k+ for repairs. Yea not worth it for my car. At least not right now. So he said to buy this and see if it works. Boom. Put it in the system and followed instructions. Added the whole bottle for my two and a half gallon coolant system. Let it sit and run and sure enough the heater started working again and he said it’s working. Let it sit and run for another 30 mins to make sure. Didn’t overheat. So I decided to stress drive it and drove it for 2 hours and didn’t over heat. Yes this may be a TEMPORARY FIX, but if it lasts me a six months to a year than I will be grateful. Just need the time to learn how to change a head gasket safely on my own so I can actually repair it. Might take me months for actual repair,it’s a big job for a newbie. I’m no mechanic plus I work 60 hrs a week. If it gives out again , I just may try this again. For less than $50 to fix the car temporarily, sounds like a good deal in my opinion. Btw, after researching, I heard it could last a few years and tens of thousands of miles.

My prius has this high mileage blown head gasket. I saw the coolant reservoir went to extemely low level. Kinda of unusual due to its new water pump and all. I called around to have the head gasket fix. At least $6T is what they tell me. Then I did my yt research, guess what, I found a video for the head gasket problem. Ordered here and received the next day. After putting it in with my coolant and did the maintenance mode, problem fixed. I drove it around, after few miles, the engine light turned off. Thr problem with a big expense is gone. Planning of using this on my next coolant cchange. No more shaking when it is cold, no other problem came up. I am a believer, I know eventually I will need to dispose off the car but not thia time. Special thanks to all yt posts, you ate all awesome.

I have a Ford fiesta 1.4tdci 2010 2nd owner, from the time I brought the car it always had coolant loss don't where changed the head the piston 3 times and then also same problem 4th time got the half engine done new block piston seal still face the same problem over heating and coolant loss was fed up of putting in so much money and could not take it for a long ride but after putting this it's been a more then a week and the engine noise changed in 15 mins and all the noise from the engine just went away and till now its holding coolant and not over heating anymore will update if I face any problems in coming times but for now it works

Funciona perfectamente, altamente recomendado

Simple to use and has fixed the leak for now. Appears to be working.

This product will not fix every head gasket issue, but it was able to fix my 2016 Prius head gasket 100%. The car was blowing white smoke out of the tailpipe and I had to top up the coolant every 2 to 3 days. I dumped half of the bottle in the reservoir tank, drove the car normally for a couple of days and the smoke disappeared. This was 2 months and 2,000 kms ago. Definitely worth trying before taking the engine apart.

This product worked perfectly on my Yaris 2008 Model which was having blown head gasket, this product sealed it perfectly. Now no more drying out coolant water from the radiator.