Common questions

Is Stop leak bad for transmission?

Is Stop leak bad for transmission?

Stop leak products can cause irreparable damage to your vehicle. If a transmission fluid leak continues, your vehicle’s transmission could also have to work harder as it gets low on fluid as you drive around. If the transmission fluid gets low enough the gears might stick or might not go into gear at all.

Where can a Stop Leak additive be used?

A stop leak product cannot work everywhere in an engine to fix the leak. For examples, an engine oil additive can never be able to stop a leak near the front seal, any sort of cork gasket or rear main seal.

What makes an oil leak stop product work?

The main difference between an oil leak stop product working or not, is if your seals have simply shrunk or are slightly deformed and need to be reconditioned, or actually have a hole, tear, or a chunk missing out of the gasket seal itself.

Are oil leak stop additives bad for the engine of a car?

Oil leak stop additives by themselves are not bad for engines. If the leak is very small I would switch to high mileage oil, these combine the stop additives into the oil.

Are there any Stop Leak products that will damage my car?

When you carefully follow the instructions for our engine, radiator or other stop leak products, there is no risk of damage. Always remember these points: Bar’s Leaks stop leak products work for small to moderate leaks. Large leaks, especially those due to physical damage, usually require component repair or replacement.

A stop leak product cannot work everywhere in an engine to fix the leak. For examples, an engine oil additive can never be able to stop a leak near the front seal, any sort of cork gasket or rear main seal.

Oil leak stop additives by themselves are not bad for engines. If the leak is very small I would switch to high mileage oil, these combine the stop additives into the oil.

The main difference between an oil leak stop product working or not, is if your seals have simply shrunk or are slightly deformed and need to be reconditioned, or actually have a hole, tear, or a chunk missing out of the gasket seal itself.

Why are some people leery of Stop Leak products?

Our advanced formulations seal small- to medium-sized leaks quickly and in many cases for good after just one application. Some people are leery of stop leak products because they fear damage to their engine or cooling system.

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Ruth Doyle