Worked as label claimed. Be sure to follow directions about flushing radiator out. Be sure to put in the right amount for the gallon size of the radiator. So far so good. Been about a month of regular driving. I think my problems began with the fan clutch then the water pump. If you hear strange noises then check those, the belt and water in radiator
Verified purchase: Yes | Condition: New
Car - 1995 Honda Civic 1.5L Automatic Miles - 200,000 plus Problem - Had a blown head gasket, blew white smoke out of the back and had an intermittent misfire. Results From Using Blue Devil - I followed the directions exactly, removed the thermostat, drained the coolant, put in water, added the correct amount of blue devil product, ran the engine at idle for slightly longer than instructed which ended up being 1hr. The white smoke did go away substantially but it was still there. Still had a slight misfire every now and again but not as frequent. Problems/Issues - After using the blue devil product I ended up having a major water pump leak right after the 1hr idle time. Not sure if this was due to the blue devil or not but it seems suspect. Credentials - Master ASE Certified Technician/ Shop Owner. Recommendations/ Future Thoughts - I would definitely recommend doing the job right and replacing a blown head gasket before using any “bottle” fix. However this was a good option due to the miles on the car and the lack of funds available from the customer. I was impressed that it actually made a difference in the coolant consumption. I am going to replace the water pump/timing belt next and re-add the remaining bottle of Blue Devil when I refill the coolant again. Hopefully it just continues to get better as it works its way through the system. Read full review
Verified purchase: Yes | Condition: New
Bought this kit for a heater core leaking and old motor that had been sitting for a while, Installed as directed with flush and clean water, then as directed put in sealer and worked great no leaking heater core and car runs just at right temp. Easy to use and great product, have used Blue Devil rear main seal in my hotrod with a real bad leak and sealed it right up, nothing better on the market hands down.
Verified purchase: Yes | Condition: New
Have a 07 Subaru Legacy that started getting coolant in the oil. Didn't have the money for rebuild or new engine. Decided to try this as a last resort. I was using 1-2 quarts of coolant every 2 days. Followed the directions on the bottle. Been 600 plus miles and 3 weeks and hasn't used any coolant at all. I would definitely recommend this product and use it again.
Verified purchase: Yes | Condition: New
It will buy you time. 6 months the first use. for me. We shall see how long the head gasket holds this time. Bottom line, an old work car can keep on going. Nothing to lose if the head gasket is blown. Worked well enough for me. The better the flush the better the hold. I left some in the system after refilling with coolant to fix any small cracks in the seal that may form.
Verified purchase: Yes | Condition: New
This review is on the seller - Excellent service and good price. Fast priority 2day shipping. Unfortunately, this product didn't work on my car since the head gasket was past the point of repair due to a a major leak. I'm sure this product would have worked couple of months earlier when I first noticed the water leak. oh well. time for a new gasket.
Verified purchase: Yes | Condition: New
I loved it, and so will you I really didn't think it would work . Two of my friends told me about it , and they didn't know each other either. Anyway I doughted all I heard until I finally bought it and tried it.. It really does work on my Ford F-350 7.3 engine , it worked and worked well . This stuff does what it says guarantee you that.. I'd give it a 5 but I don't know how long it will last . But maybe I'll get 20,000 Maybe 25,000 if I do I'll make that 4 star 🌟 a 5 star 🌟 🌟 🌟 🌟 🌟 ... Will keep everyone updated as soon as I can . All jokes aside this is the real deal try it , it really does work...
Verified purchase: Yes | Condition: New
After following the directions to a tee , It didn't work on my 2003 Subaru Forester . I still must add from as much as i/2 gallon to a pint of coolant for each 75 to 100 miles . I used a little more than 1/2 of the 32 oz. bottle for my 2.5 Liter four cylinder engine . I am now exploring how to apply for the refund since it is guaranteed .
Verified purchase: Yes | Condition: New
I seen this product and thought id try it and it says guaranteed on the bottle so what do i have to loose.I tried out the product and followed the instructions,this product didnt work for me and im trying to find the website so i can get another bottle or my money back
Verified purchase: Yes | Condition: New
Caused £600 of damage to my car, as it fully blew my head gasket - it had only been a minor leak before using this. I paid a mechanic to put this product in as I wanted it done properly yet it still destroyed my car. Very expensive mistake.
Verified purchase: Yes | Condition: New
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