Smoke from the engine?

I just bought the Bar's Leaks Liquid Aluminum Stop Leak and I’m truly sastified. After noticing a coolant leak from my car on my driveway and when I got to work, I was afraid that i might break down on the highway going to work or going home from work. At first, I was skeptical about using a stop leak product since I’ve never used one before nor did I hear anyone give me feedback about their experience with any leak but this one honestly exceeded my expectations. I am 100% happy with the results, I haven’t seen any leaks. I will top my coolant reservoir with coolant and see if the reservoir itself will decrease in coolant since I haven’t seen any drips under my car.It was straightforward, add the bottle into the reservoir since I didn’t have access directly to the radiator on my car. It has instructions on the bottle on how much and where to add the liquid to. My engine temperature is normal when driving and I’ve never seen it go up ever since adding this leak liquid. I can say I’m satisfied and for reference, I added full bottle into my reservoir and my vehicle is a fairly newer Jeep Grand Cherokee!

Yeah I think you can get some years ago my pickup truck started spraying coolant all over the place under the hood period I was traveling, and I was not in a position to replace the water pump. So I went to Walmart and looked at all the radiator stop leaks they had there. This was the only one that offered a money back guarantee. I did not care about the money back guarantee, but it made me think that they must really believe in this product.I told my son that I had been using radiator stop leak products for over 50 years, and they had never really worked. So he asked me why I was doing it now. I said because I didn't have any other choice.And then, to my utter astonishment, this product worked. After a few minutes, all the water spraying under the hood stopped!This is years later, and I still haven't replaced my water pump. I have had to refresh this product once or twice by adding more to my cooling system, but who cares. I always travel with a full bottle of this in the truck somewhere!

After use the leak increased in speed. I can not be sure this was related to that but it did happen at the same time. I drove 2 hours after use. I do not think the radiator itself had any leaks and I put in a pump and new hose last year which helped greatly but didn't stop the slow leaking. A rate of every 3 months; I was hoping this would reduce the leak rate further but things got worse; it went back to how bad it used to be. Like I said, I don't think I can link the problem to this product, which is simply metal flakes in liquid which hopefully get jammed into leak. What I did notice is that the level never goes down when driving but after sitting a while the level goes down; so this could be helping during operation but when the pressure drops this stuff no longer plugs the leak so it still is leaking. The fact it is worse I do not think is connected. That is my theory on what is going wrong. I think this product is a clever solution to mitigate leaks but unlikely to solve problems - which is the expectation I had when I bought it. I may buy it again.

This stuff works! I am very impressed. It saved me money and time. I usually don't write reviews. I had it in my vehicle for about a month. I had a radiator leak. It was a small one near the hose going into the radiator. My brother put it in, no more leaking antifreeze or overheating.

I bought this for my 2002 Dodge Durango which appeared to have a small leak near the bottom of the radiator. I noticed I was repeatedly adding a little coolant to keep the overflow tank measuring stick up to snuff.I didn't notice any major spotting, but in the past week had seen some coolant which had dripped under the engine. All the hoses, etc. checked out fine, but the leak had become noticeable.I bought one bottle and added it to the car. The bottle says to add it to the radiator, or lacking direct access through a pressurized cap to add through the overflow reservoir. I shook the bottle well. The fluid is a somewhat thick consistency. I followed the tips of a few people on-line and added most of the bottle in through the pressurized cap, then added less than a quarter of the bottle into the overflow. I capped the radiator and then ran the car for about 45 minutes. The bottle said 10-20 minutes but........Anyway, the leak appeared to immediately stop. It has been over a week and I have not had to top off the coolant. I will update this review should anything change.Overall, reliable product from my experience.

Didn't work.

If I could give this zero stars I would. Never, EVER put this cr*p in a Honda engine since you will most likely be getting a tow to your mechanic. Sent RPM's soaring and surging...got the car to spit some of it out by running without the radiator cap but only helped a little and did not undo the harm. Had to get a AAA tow to my mechanic and he had to clean out a bunch of parts and do a drain, deep clean and refill. Did a bunch of research before putting this in because I do care for my aging vehicles and did not get the impression this could potentially destroy my engine so gave it a shot but wish I never did. Right after taking the plunge I found a mechanics blog completely despising this product saying it does not agree with Honda's (why couldn't this review show itself sooner??) that's just my luck in this instance.

If you have older vehicles and loose any water, use these stop leak products from Bar's or other vendors. These work well for blocking any loss of water and assure your water level will remain high. It seemed like I might be losing some water and I'd refill it, but adding a stop leak always slows down or stops any lose of coolant, so it's well worth it. If you get a head gasket leak, you'll have to replace the head gasket eventually, but here again it helps slow any leakage.