![]() It generally always worked and I never had a catastrophic failure. I've used stop leak many times in winter beaters and have had excellent success. While your at it, replace the CCV on the back of the intake manifold as well.Thank you for the info. Its a good idea to replace the valley pan gasket along with all the other seals around the intake manifold. You can look down and see the same burnt coolant or wetness. You can also check for leaking between the motor and the firewall on the passenger side of the car. Usually, you will be able to see the remains of burnt coolant or it might even still be wet or moist down there if you have driven the car recently. You can remove the plastic engine cover and then look down under the intake manifold with a flashlight. You can check for leaks from the valley pan in a few different areas. I have to add additional coolant every 3 weeks as well. While your at it, replace the CCV on the back of the intake manifold as well.Ĭhances are that your valley pan gasket under the intake manifold between the 'V' is leaking. stop leak does nothing but destroy your cooling system.Ĭhances are that your valley pan gasket under the intake manifold between the 'V' is leaking. You should fix the component that is leaking. If you're going to use a stop leak product, choose a high-quality product offered by a reputable company.Stop leak should never be used EVER in a car. Keep in mind that some stop leak products carry the risk of clogging your radiator and heating core. ![]() Assuming your vehicle is old, it might not be worth paying $1,000 to replace the head gasket, in which case a stop leak product may work. If you have a blown gasket that's leaking coolant into one or more cylinders, you may have to spend up to $1,000 to replace the head gasket. The ideal solution is to repair the leak - or replace the leaking component, depending on what's causing the leak - but this isn't always an option. With that said, many drivers have successfully used stop leak products to temporarily or even permanently stop a coolant leak. There's no guarantee that a stop leak product will fix a leaking radiator or cooling system. Should I Use a Stop Leak Product on My Vehicle? Also known as liquid glass, it hardens when exposed to heat, such as hot combustion gases, to form a seal. It works particularly well when coolant and exhaust gases are leaking together. One of the most common ingredients found in stop leak products, however, is sodium silicate. As the stop leak product flows through the radiator and cooling system, it will collect and harden at small leaks, essentially stopping the leak.ĭifferent types of stop leak products use different ingredients to seal leaks. They usually come in bottles that you pour directly into the radiator (wait until your engine is cool to open the radiator, of course). Stop leak products are designed to seal leaks in radiators, coolant hoses and gaskets by plugging them with some type of material. Known as stop leak products, they are often used on older vehicles when the cost of a full repair isn't financially feasible. The good news is that there are dozens of products designed to seal radiator and cooling system leaks. When a leak occurs, coolant may escape, resulting in lower cooling efficiency and, potentially, engine overheating. Radiators or other components of your vehicle's cooling system, however, can leak. Known as coolant, it's one of the most important fluids in your vehicle, carrying heat away from the engine and to the radiator where it's released through the front of your vehicle. With the exception of a small number of air-cooled engines, most automotive combustion engines are cooled with a solution of antifreeze and distilled water. If your vehicle is losing coolant, you might be wondering whether a "stop leak" product will solve your problem.
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