Updated at: 27-07-2022 - By: Lucas

Catalytic converters aren’t something everyone is familiar with. A lack of understanding means that you’re missing out on a lot.

Catalytic converters, on the other hand, are well-versed in their operation and can detect any anomalies.

Water pouring from your catalytic converter is one of the possible irregularities. You might be alarmed at first, but it’s really nothing to be concerned about with your car.

Catalytic converters reduce the amount of toxic gases produced into the environment while a car is driven. Because of this, the catalytic converter releases water vapor.

Why does water leak from a catalytic converter?

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A catalytic converter can leak water because it reduces the quantity of vapor that exits the car. In order to oxidize and reduce dangerous gaseous emissions, the catalytic converter must be used in conjunction with the exhaust system.

Nitrogen oxide is reduced by a rhodium and platinum reduction catalyst. When the nitrogen atoms in nitrogen oxide molecules are removed and the free oxygen is released, it creates an abundance of oxygen. As a result of the reaction between the catalyst and the nitrogen components connected to it, nitrogen gas is produced.

Catalytic converters, on the other hand, use palladium and platinum oxidative catalysts to decrease CO2 and CO2. Consequently, water and carbon dioxide are produced as a result of the reaction between unburned oxygen and hydrocarbons.

Byproduct water is what comes out of the catalytic converter when it’s undergoing the oxidation and reduction process.

This indicates that the catalytic converter is functioning properly. When the converter is constantly leaking water, this is not typical. It suggests that the converter has a problem.

Reasons for water drips from a catalytic converter

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1. Oxidation and reduction process byproduct

Catalytic converters transform hazardous engine gas to less damaging ones that are safe for the environment.. The oxidation and reduction process makes the car more environmentally friendly. Water is created during this process, which is why it is possible for water to leak out of the catalytic converter.

2. Condensation from engine heat

The heat from the engine can cause the catalytic converter to produce a lot of vapor. When a car’s engine is turned on, it generates a lot of heat, which heats up the catalytic converter. As it gets colder outside, the catalytic converter generates vapor.

How do you fix a leaking catalytic converter?

Catalytic converter leaks are as simple to fix as noticing that they are leaking. A leaking catalytic converter can be fixed in three simple steps.

Step 1: Locate the catalytic converter of your car

There is a type of exhaust system component known as a catalytic converter that appears like a box but is actually constructed of metal. As a result, it is sandwiched in between engine exhaust and exhaust tailpipe.

Step 2: Locate a leaky section, maybe a hole or crack

Finding the specific leaky component of the catalytic converter may take a few hours, of course. To find it, run the engine for a few minutes to allow exhaust fumes to travel through the catalytic converter.

Step 3: Stop the engine and allow the exhaust system to cool

In order for the exhaust system to heat up, the engine needs to be running. The catalytic converter and other exhaust components need time to cool once the engine has been shut off.

Step 4: Using a piece of steel putty, place it onto the leak hole or crack

Once you’ve applied the putty, use your finger to smooth it out so that it’s flush with the exterior surface of the catalytic converter.

Step 5: Allow the putty to dry up

Do not start your engine right away after using putty to fill in a hole. Wait for at least four hours, and the seal will have set, making it impermeable.

How much does it cost to fix a leaking catalytic converter?

Repairing a leaky catalytic converter is expensive. It can cost up to $ 2200 or more for a new catalytic converter, which is nearly the worth of your car. As a result, it might set you back anywhere from $940 to $2400. This includes the cost of the catalytic components as well as the labor.


Although water leaking from a catalytic converter can be alarming, it is not a cause for concern. Catalytic converters use oxidation and reduction processes to remove hazardous emissions from the exhaust before they are released into the atmosphere.

A broken catalytic converter can leak water even though it’s usual to see water dripping from the exhaust pipe. In order to avoid damage that could be expensive to restore, it’s best to act quickly.