Blown Head Gasket Fix Repair Sealer for 4 Cylinder Engines

I had a check engine light on with ABS light. Did the usual fixes - changed the fuel cap, reset the codes, etc. As the car was 100k plus miles, so replaced the spark plug. After a while the check engine light came back. The code check was P0304 - cylinder 4 misfire. It was a head gasket leak - bubbles in radiator and smell gas in coolant. Got the hydrocarbon tester from OReily's and it confirmed. I checked the engine oil cap but it didn't have any residue. I also removed a little engine oil to check if coolant had gone into engine. I didn't find any major trace of coolant. However, the coolant was going down and I had to fill up coolant once a week. This is when I decided to try the head gasket sealer. I removed the thermostat, filled the radiator with normal water. Followed the instructions mentioned in the pack. Once I added the sealer, kept engine running for 30mins. After this, I drove the vehicle for 15 - 20 mins on free way at 3000rpm. Left it to cool overnight. I had reset the engine codes and drove the car around. The check engine lights didn't come on. I have been driving the car for more than 3 months now. I had no issues with this - no check engine light, no gas smell in radiator / hydrocarbons. I can only upload one video, hence can't show the video where there are no bubbles.

Worked for about two hours. Initial start up and drove for a couple of hours and didn’t leak. Second drive about two days after and started leaking antifreeze again. Not a big leak to begin with. A pinhole leak on cylinder head. Used two bottles. Used two bottles on a 4 cylinder, 1800 cc engine.

Head gasket on my 2011 Camry noticing bubbling the coolant reservoir so exhaust gases going into my coolant. After trying other products like k seal pour and go and bars head gasket and block seal I tried this. What I did was drain the antifreeze coolant out I the upper radiator hose off where it connects to the head of the engine and took my thermostat out and just flush water through the upper hose connection on the engine to let it come out where the thermostat sits.then I drained my radiator. And with the thermostat still out of the engine poured the steel seal into the radiator and filled it with water and let it idle for about 45 minutes and turn the engine off and let it sit overnight. Then first thing this morning put the thermostat back in after draining all the water from the radiator, the block and the coolant reservoir. Filled the coolant reservoir and the radiator with premixed antifreeze and I noticed my check engine light turned off and no more hard starting after a good long drive. I taught the radiator off the rest of the way seen no more bubbles coming from the radiator

It's been a week now (500+ miles tested) since I've done the treatment on a 1.8L Toyota Prius that had codes for misfire cylinder on all 4 cylinders and I can honestly say it works but I followed these exact steps: Step 1: Cooldown It takes a car 4 to 8 hours for an engine to cool down but it will only cool down to the ambient room temperature, so I had to wait overnight for my car to fully cool down (I'm doing this in summer). Step 2: Drain & Refill Radiator I drained the entire radiator from the bottom, than pour small pot of hot water through the radiator reservoir to help clean out any previous antifreeze remnants. Closed it up, poured 1 gallon of tap water, than half bottle of Steel Seal, than more water and topped it off with the rest of the Steal Seal. Step 3: Drive 10+ minutes with 3500-4000 RPM I drove my car to the highway and then went about 7 miles and then made a u-turn to the next exit and went back on the highway. I did about 20 miles with 14 of it being highway miles. I made sure that I DID NOT turn on the AC/Heater during this trip because I heard about this stuff getting stuck in people's heater core, so I just avoid turning on my air. Step 3B: (OPTIONAL) Clearing Air Pockets I wanted to clear all the air pockets in my radiator so when the car was turned off, I briefly open the reservoir radiator cap (while it was warm) just for all the bubbles to push up and then closed right away before it could spill out. This will damage the reservoir cap so you will need to replace it eventually if it's not damaged at the moment. Which you're supposed to replace when you're doing this Steal Seal treatment anyways. Step 4: ENGINE COOLDOWN Now that the steel seal is all over the cracks, it needs to cool down for it to cure so I waited overnight for the car to go to a complete cool down before driving her the next morning. It's been a week now and I've been driving her normally, and so far🤞 there has been no check engine light, nor any rattling on the engine. If anything changes, I'll come back to this review 😅

Thank you for your attention. Unfortunately. treatment to my car was unsuccessful. I used as directed. I took in to be checked This product did not help me

Great stuff to use for a slight leak in a head gasket, put it in and within 20 minutes the vehicle was fine.

Tried it today in my 2013 Subaru WRX 2.5 l turbo. It has had an overheating problem diagnosed by several techs and myself as blown head gaskets. Followed directions and took the car for a 1/2 hour 70 mph drive on a freeway. Upon exiting the road I went to a convenience store nearby and it over heated again before I went the 200 feet into the parking area. This stuff is like the others I used, snake oil!!!! $100 wasted!! 4/14/2026 Ray Colbert Pittsburgh PA

This product is a life saver. I know we blew the head gasket on my 2010 Toyota corolla. I could not drive over 200 yards without overheating and all my idiot lights were going off. I had a lot of steam coming out of the tailpipe. I pulled the plugs and saw antifreeze in the cylinders. I got the product as a last resort. After using it, the car is running like new. Thank you so much!!!

Coolant was seeping into my cylinders overnight which was causing misfires and check engine lights the morning after. I believe I caught the early stage of gasket failure and coolant reservoir maintained level after using this product. Tip: the instruction said to run highway speeds maintaining 4000rpm, which is not feasible. This can be achieved driving around your neighborhood in low gear and your speed will be slower to 30km/h.

I used 2 bottles. Others have had success but not me.. Maybe my head gasket is too far gone

Didnt work. Infact made matters worse

It's expensive for nothing not working with me

Works as designed. Saved us a new motor