Does K-Seal Coolant Leak Repair Work?

[boltblue]

I have 2003 Nissan Z with a headgasket leak. I thought it had a bad radiator, cooling fan, thermostat and coolant temp sensor cuz my car was overheating. Despite the cooling system refresh, my car was still overheating. Took my car to my local mechanic and told me the headgasket is blown. They gave me an estimate for the repairs and let's just say it was not cheap. I refused to get it repaired and took it back home. I went ahead and buy one of these K-Seal products and if it does not work, then I'll get it repaired from a local shop. So I put the Kseal into the radiator, turned the heater to full blast and let it idle for a bit. I took it for a test drive and to my surprise, my car is no longer overheating! This product works, as long as the leak ain't that big. Consider using this before taking it to the shop, this could save you thousands of bucks in repairs

[danp]

I swear by K seal. It's thin enough not to clog radiators or heater cores. I used it in my friends Chevy Sonic. It had a leaking radiator. Those car's are a domino effect of cooling system problems. Needless to say: the car now holds coolant and no more leaks. The radiator didn't plug up. Also if your cooling system is filled through an expansion tank drain off enough coolant to disconnect the 3/4" id hose and pour the well shaken K-seal in. Then put everything back together and top off with coolant while the engine is running.

[dlbracer]

It stopped the leak within 10 minutes.
1997 4.0L six cylinder Jeep with 226, xxx miles (FOURTH radiator). I'm going to run this for a couple of weeks then a drain, flush, refill.

[damethyst]

I understand there’s much better alternatives and I’ve built my car up from an almost junked 88 Mazda 626, but right now as a welding student, my funds for the week aren’t enough, it’s closing time for stores, and I’m not paying someone else to fix my car for way more money than it costs me to do. This will work great for a temporary solution in a time of need. A few weeks from now I will have a new radiator as well as some other things. I guess my lowering springs can wait.

[keithedwards]

hell it work, first I used one called bars no good, so I herd about K Seal so I dream some of the cool on and had the K Seal turn on the heat hand drove around for about 45 minute no more leaks to my heating core thank you Jesus.

[Sxcuhan]

16 SRT Jeep GC, was overheating like crazy. Let her cool down, blasted my heat and poured this directly into my radiator 20 mins later. Fixed. K-Seal is the GOAT. Could be placebo effect but my throttle response picked up as well.

[jblaze]

best $13 ive ever spent, i had the classic turbo leak on the inner fittings on my f150. i shook the bottle, poared it in, ran engine till the sparkles disipated in the reservoir. i brake cleaned the fittings and a week later they are still bone dry.

[parampreetsingh]

I have 2021 kia forte (83000km mileage). Few days back the heater stopped working, then car also got stuck and wasn't starting on changing the gear from parking to drive mode. Eventually the engine started overheating, so we took it to Kia dealership. They said waterpump might be leaing coolant, and now it has damaged the engine also. I dont really trust because they have been making up stories since weeks.
Any idea however what the issue can be? Or how I should investigate to find out the root cause?

[kevinfrancisco]

This stuff is a like a bandaid when it does work doesn’t last too long but for the most part it does more damage then to fix a leak.

[deontemays]

Does ur coolant tank have to be empty?how long should i let it run

[dnadnadna]

can disconnect the heater core and use k seal

[WayToManyAssassins]

works for small cracks but nothing larger than 0.275 mm

[fff]

this crap couldnt even fix a slow leak in my heater core it also stinks.

[sshizy]

Yup 😂😂😂😂😂😂 15000 miles just watch the antifreeze. Pour it in the hose behind the radiator

[abelcerrillo]

I tried it and it failed used the 8oz and it failed then I used the 16oz and it failed, now I have to replace my radiator and a freeze plug.

[Louis.]

GREAT REVIEW
SUCCESSFULLY ENTERTAINED 👍

[podunkpennsylvania]

pricey little bottle.Exceptional results

[justfly]

Works great but caused the thermostat to stay open.

[TOPROPE]

That stuff is trash. I put 4 16 oz bottles of the ultimate in my peterbilt and nothing happened. No oil in coolant or coolant in the oil. My sht stll loses coolant

[WowItzAkina]

If your head gasket isn’t leaking chances are it might be your intake manifold