5.0 out of 5 stars It works!

J. · May 24, 2025

(function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } I was skeptical of this product and 100% do not expect it to be a long term solution but gave it a shot on my 07 Honda with 195,000 miles on it. A head gasket repair is not worth it on this vehicle due to price and value of vehicle. I figured this stuff can’t hurt and can at least get me by till I can find a new vehicle. I had a small leak of coolant into cylinder #5 and misfire on #5 that would lead to white smoke and a sweet smelling exhaust. I verified with a bore scope that coolant was leaking into #5 overnight. I added the Bars head gasket leak and followed the directions and the next morning no misfire and no white smoke or sweet smelling exhaust. Took it for a test drive and seems to run smooth and no hesitation that it was having before. For day one I’m impressed time will tell how long it last but hopefully I only need a few weeks before I find something to replace this vehicle with.

5.0 out of 5 stars Wow just omg wow

A. · April 24, 2025

Listen up everyone! Stop scrolling and read this!!! My trailblazer was acting like I had a blown head gasket or cracked head! Its a 2003 with well over 260k miles on her! Other than this shes done me so well. One morning I was on my way to the doctor's. I looked down at my gauges and my oil bottomed out the pressure in it. I was blowing white smoke out the back and then it stalled so I pulled over sat there a minute restarted it and the oil gauge went up so I got to the nearest store checked my oil my oil was low so I put oil in it It was fine for a little bit then it kept doing the same thing. So I went and got an opinion on what could be wrong and they had told me cracked head or head gaskets. I don't have $7,000 to pay to get it fixed when my truck is worth at top end $3,000. So I decided to do research and I came across this b a r s all the reviews I read we're good sorry I figured out I'll buy it give it a try. I got this in the mail read the directions did it to a t It took about three running cycles and my oil's been keeping pressure I haven't had any white smoke blowing out the back. This is the best stuff I have ever purchased for in my truck that actually worked Do not hesitate to buy this trust me it'll save you thousands of dollars whoever came up with this product I hope they're making bank because they're saving me bank.

5.0 out of 5 stars I'm grateful

z. · May 12, 2025

It really works!My 2GR-FE engine was overheating after about ten minutes from cold start, and I was losing coolant constantly. A combustion?leak test confirmed a blown head gasket. Repairing it would require pulling the engine—far too expensive for my car—so I tried this as a last resort, and the results have been fantastic. The coolant temperature returned to normal, and I’ve driven it for about a month with no issues. I still see a bit of coolant loss, but I’m not complaining—at least my car is back on the road!I'll update after one year or 2 years. I'll be grateful even if it can only last one year.

4.0 out of 5 stars Skeptical but it worked for me!

K.J.D. · May 24, 2025

I was skeptical at first but I watched numerous videos online and especially a video from Chris Fix who did a video of this product and opened up the radiator after the treatment and zero blockage. Plus if you understand how this product works (triggered by heat and then cooling) you’ll understand that since the radiator is cooling the product immediately that it won’t react within the radiator.Now my situation was ideal for this product, I had a warped engine block from after replacing my head gasket and overheating so there was a micro gap in one cylinder that was slowly burning off coolant.I’m three weeks post treatment and no more white smoke and no more topping off the coolant reservoir. Let’s see how long it holds up

1.0 out of 5 stars Did not work

A.C. · April 20, 2020

I talked to a Bar's leak tech rep before using this and followed his recommendation to flush the cooling system completely before adding half a bottle to my 2.5L 2006 Subaru forester engine which had bubbles in the cooling reservoir, was loosing antifreeze, and obviously had a blown head gasket. It was not overheating after their recommended test of 20 minutes, in fact it would take three for four hours before it lost enough antifreeze to overheat. I added the HG-1 per his recommendation and followed the directions to a tee. It initially cleared up the white smoke coming from the tail pipe but didn't stop the bubbles in the reservoir or loss of antifreeze. After about a week, I spoke to another tech rep who recommended that I drain the cooling system, refill with a second application of Bar's Leak HG-1 and follow the instructions again which I did. I've been driving it for about a month now and I still have the problem along with a lot of gray gunk in my cooling system. I called a Bar's leak tech rep again (April 2020) and he did not have any other ideas except to say that it doesn't work on all engines but that they would send me my money back or send me another bottle of HG-1. the only hitch was that I needed to get a statement from a repair shop that the car still needed a head gasket replacement. This is an example of a worthless warranty. If I take it to a shop it will cost me at least $100 to get such a statement and I only paid about $34 for the HG-1. The car is old enough that putting $2K or $3K into a head gasket replacement is not worth it so I am just going to live with the problem and fill up the radiator when it needs it. Based on my experience, don't count on this product to fix your head gasket problem despite all the positive reviews out there. I thought I did my homework by reading these but was totally misled. This is not the cure that is 'guaranteed' on the box cover. You will just waste your money.

Over heating and coolant loss fix

A. · July 10, 2018

(function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } 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

Worked like magic!!!

r. · August 22, 2023

This product exceeded all expectations. I had a warped cylinder and subsequent leaky head gasket in my economist engine...design flaw in those engines. I was adding antifreeze daily at least 2-3 cups . I decided to try this product to see if I could keep it running until new engine arrived...6 months or so. After using this product I had zero antifreeze loss...no further white exhaust and added no further antifreeze for 8 months when I replaced the faulty engine...probably would have lasted a lot longer but I had already committed to the engine purchase. Easy to use clear simple instructions. Have recommended this product to many people since then. 10 stars from me!!!

Funciona

M.G. · May 16, 2025

Funciona!? Si pero no espero que dure de por vida, usalo con moderación y siguiendo laa instrucciones al pie de la letra, recomendado usar de a 1/4 al principio y conforme notes qué esta solucionando el problema sigue usando el producto, yo en total use el equivalente a 1/3 de la botella y en unos 5-10 días purgo el anticongelante para retirar el sobrante del sistema.

Excellent product!

U.R. · August 29, 2024

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.

Grateful user

K.D.G. · March 26, 2025

Great product works every time