CS Engine Combustion Real-TIME Leak Tester - Cylinder Gasket CO2 Head Tester - Test While Driving - Petrol Diesel Gas - Engine Under Load Head Gasket Test Kit - 2 PCS in a Box

(1) This is a great concept. Instructions are clear. It's very easy to use. (2) My car developed a misfire more-or-less immediately after it got hot (thermostat failed), and I figured odds were the headgasket failed or the head cracked. I replaced the sparkplugs (they were due) and the misfire went away. (3) Decided to try this product, then used it about 100 miles after replacing the spark plugs. It showed no combustion leakage. (4) I've still got no symptoms of combustion leakage, so it seems likely I dodged a bullet. Hopefully the test result wasn't a false negative.

There are several videos on the internet proclaiming this kit is a scam. For me, it worked perfectly. From what I can tell, the people on the videos didn't follow the instructions. This has to be put under the radiator cap, NOT the overflow tank. Heat the engine up to normal operating temperature, then drive it around for 10 minutes, (kind of push it too). Let it cool enough to open the cap (be careful to release the pressure first) and then compare it to the chart. This would be great when purchasing a used car with questionable history.

I installed and used it exactly as described but not sure the diagnosis is correct. The liquid stayed the same color indicating all is good. however, I not so sure this is correct. Possible small leak at head gasket.

I had bubbles in my coolant reservoir. I did 3 of these test and they never changed color. I replaced my cap and kept looking for what could be causing it but couldn’t find anything, so I bought a harbor freight test in for a positive result. I would not recommend this kit. Go to harbor freight and buy the reusable test it’s only a couple dollars more but actually works

Easy to use, Used twice so I feel confident of results.

Really easy test. Seems for now like the results are also ok.

I had to use both packets because I must have left it in too long,15-25 minutes. when i took the first one out it had leaked out a hole in bottem. next one left for about 5-10 minutes, compared its color and to my relief showed yellow. I like the simple method for checking a major engine problem.

I was very skeptical because the product is in a sealed bag with no exposure to the coolant being tested. Actual test results in a vehicle that tested positive using test fluid, tested negative with this product, false results as expected.

Takes about 20 min start to finish - pray for yellow.

Worked

So, the idea is that gas molecules enter through plastic into liquid.It asks for being used while driving the car and then check. If you drove the car and open the radiator, you will get hurt if you don't wait for it to cool down.I tried to use at my 1990 RV which needs easily 1 to 2h to cool down because of the size of the radiator.So it stays for at least 2 hours in it.While most systems you can buy for around 60 bucks give you a result in seconds, this one is not customer friendly at all.Does it work? I saw videos it does but because it is so difficult to use, I will spend the 60 and get something I can rely on

Item did not work as sdvertised, complete waste of money, and i used it, so i have nothing to return for a refund!! First order on Amazon that i have been dissatisfied with. Would like to have given it 0 stars!

First test which didn't touch any coolant because it was low, negative. Second test after filling coolant, positive.If you're using this test for a gasket leak, your coolant probably won't be topped off, so I really can't say I recommend this kit for testing. Check to see if your engine oil is rising instead. That's a sure sign of a gasket leak.