Blue Devil Head Gasket Sealant (32 oz.)

My son's 89 Ranger was using around a quart of coolant per week in the few miles he drove to high school and home. I tried other coolant sealants with little or no improvement. The Blue Devil has been in the truck for a month or so and seems to have fully cured the problem. This stuff really works!

I put Blue devil in a 2.2 L Mazda MX-6 engine. I put 100,000 miles on the engine since I put it in. I believe in this product. As long as you follow the instructions. I would recommend flushing your system completely with just clear water from you garden hose before you use this product. This will insure all your ports are clean.

My 1999 Chevy Malibu overheated and probably blew at least one head gasket i cautously debated your product for a week but after pricing a headgasket repair of 400$ and more, i tried it after 40 minutes it was passing water and i was sweating but after 50 minutes it slowed down and after a test drive i am no longer loosing any water out the tailpipe. Thank you Blue Devil i am recommending your product too anyone with a problem like mine.

Amazing stuff! It worked on a blown head on my civic. When you have a lot of water coming out of your tail pipe and your car doesn't run on steam, that's not a good thing. Completely fixed the problem with no side affects.

I have a 97 Outback that buried the temp guage while driving home from work. I had to stop and let it cool off 4 times in 8 miles. I was unable to drive the car until I used Blue Devil and it cured the problem. I highly recommend the product to older Subaru owners as they are known for head problems. I have since put 15000 miles on the car and no problems.

I know what people think about mechanics in a bottle, But this stuff WORKS !!!! I bought 2 quarts to try and fis my nephews water leaking problem in his tractor. Man at the auto parts store asked why I was buying 2 qrts. I told him it was going in a tractor that was using 3 gallons of water in about 900 miles. We could not see where it was leaking so we figured it was going out the stacks. The parts store guy said I did not need to put 2 qrts. in that 1 was more than enough, I was skeptical and he told me this is the best sealer on the market today!! I followed the instructions on the bottle and crossed my fingures. The truck now has more than 10,000 miles on it and still has not used ANY WATER !!!!!!! This stuff works and I'LL buy it again when and if ever needed !!!!!!!!!!! Thanks Blue Devil, You saved me $ 2200.00 in repail bills that I couldn't afford right now!!!!!!

Thanks to Blue devil my 2006 e-150 has new life again at 176000 miles. I followed the instruction and my head gasket leak was fix in under and hour!!!! Thanks again to Blue devil!!!!

I've used this on 2 cars my 90 Caddy that had a Compression leak into the cooling system. I could actually hear the engine sound and run better as I let it run per instructions. The 2nd car I used it on was a Chrysler LeBaron with the Mitz. V6 the exhaust from the flush would burn your eyes. 10 mins. into the running with the Blue Devil and that car quit smoking. I live in AZ. and cars with disconnected heater cores are very common out here. I plan to use this in every car I end up with whether it has a cooling issue or not. I can be used as a preventive treatment.

1999 gmc jimmy 4.3 eng.Had water running down side of motor and from tailpipe,either bad head gasket or intake manifold gasket,i didnt flush eng.like they say to do, poured in slow ran for an hour in 20 mins.no coolant leaks,thought i'd give it a try before tearing into top of eng.couldn't believe results been driving it 3 days no coolant leak ,amazing stuff!

Had a 2000 Chrysler Sebring convertible that had multiple leaks from the freeze plugs. Estimate to pull the engine and replace the plugs was $2,500.00. Had my mechanic drain and flush the system clean, remove the thermostat and then refill and add the Blue Devil Sealant. Ran the engine for about an hour and the results so far, are excellent. It's been about 3 weeks now and no signs of leaking.

A MONTH AGO I TRIED THE SUGGESTED AMOUNT & FOLLOWED DIRECTIONS TO A TEE IN A 1998 VENTURE.DIDN'T WORK,STILL HAD SKIP. BUT WAIT!! I PARKED CAR FOR 1 MONTH WITH INTENT OF SELLING TO JUNK YARD. I STILL HAD 1/2 QUART, SO I POURED REMAINDER INTO RESERVOIR & LET IDLE FOR LONG ENOUGH TO SERVICE & REPLACE BLADES ON RIDING MOWER. GUESS WHAT! NO SKIP. HOW LONG IT WILL LAST, WHO KNOWS.

my s10 has 346000 miles on it i had to replace water pump and rad i used all new gaskets clean all parts . the water pump fasten to the timeing chain cover were there also a gasket .and timeing chain cover fasten to the front of the engine block were there also gasket . i could not get it to seal to save my life. i even went as far take it all apart /clean parts again/new gasket again.it hit me i remember old timers talk about years ago .that stuff works great. it help save my old truck. thank you for this product

My Ford Windstar overheated, after that it kept overheating so I took it into a shop. I was 250 miles from home and didn't have the money for a mechanic to dig into it. I asked if there was a product that would allow me to get home on whatever the problem was (head gasket, warped head, cracked head or cracked block). I didn't have the tools to remove the thermostat so I called an independent mechanic shop. They did all the work, I bought Blue Devil, engine flush and a thermostat. They did a great job, Started on the road as soon as they were done and it held the entire way home and is still holding. Thanks Blue Devil!!!

My older F150 had a cracked head that was leaking radiator fluid into one of the spark plug wells (shorting the #4 plug). Both of my most trusted mechanics said to get a new truck. I used 2-qts of Blue Devil since my coolant capacity was slightly larger than that recommended for 1-qt. Sealed everything up and the truck has been running great for a month. Thanks Blue Devil!

My 99 Cummins engine was cracked from one end to the other I couldn't keep water in it I've tried many other products with no success I put one quart of blue devil in two weeks ago according to directions and I have not lost a drop of coolant since then it has amazed me I never thought it would work but it did.

my daughters 1999 ford expedition. 4.6 v-8. had her heater core replaced at a shop and they didn't secure the heater hose connection at the firewall. lost most of her coolant in a real hurry. resulting in both head gaskets blown. shop offered to share the phenomenal cost of replacing them. I got a quart of blue devil, followed directions and woohoo. over two years later and it's still crooning like Crosby. I was so impressed I went back and bought another quart to keep in the garage just for future in case the need ever arises in another of our vehicles

FANTASTIC PRODUCT. Had a Head Gasket Leak and followed the Instructions on the Bottle to the Letter ( this is very Important) no shortcuts. Car is runny like new over 500 miles on it so far. The leak is fixed. The Product Says its a permanent Seal and i have to say it sure looks like it is.

I never give reviews on products, but in this case I have to. I did a block test and had combustion gases in my radiator. I need to have head gaskets replaced but do not have the $2100.00 it cost to do it. My mechanic recommended this product. It actually fixed it. I cannot believe. It seems to be a great product.