car battery leaking

What does a Car Battery do?

Before learning how to solve car battery leaking problems, one should understand what a car battery does. Being a car owner, it is of paramount importance that one understands how each component of one’s vehicle contributes to the overall functioning of the vehicle.

The car battery is an exceptionally important component in the car. Not only does it aid in the initial spurt of life when one turns the key in the ignition, but it is also the most important source of power for car lights, stereos, air conditioning, and so many other functions.

A car battery is often neglected by the car owner even while they ensure proper maintenance activities are carried out for the other parts of the vehicle. What many car owners don’t understand is that a weak battery often hampers the performance of the other car accessories.

It’s only when the car battery leaking issues lead to larger problems that the car owners wake up to the elephant in the room. Though the life of a car battery is for approximately four years, car battery leaking doesn’t aid in the longevity of the battery. The life span of the battery is reduced drastically due to the oversight over identifying a car battery leaking issue and nipping it in the bud.

The car signals the owner or the driver occasionally about a failing battery. There are tell-tale signs of a battery needing replacement. But before one runs to replace one’s car battery, the real reason for the issue needs to be identified and many times it is due to the car battery leaking.

signs that Car Battery needs replacement

What are the signs that Car Battery needs replacement?

Now that we understand the overall importance of the car battery, we need to understand when does a car battery needs replacement. As pointed out earlier a car battery usually works for three to four years without a lot of complaints. That is provided there are no major problems plaguing the battery like maybe a car battery leaking issue.

Owners can quickly take cues from the following signs that maybe there are some nagging problems with the car battery. Upon successful diagnosis, one can take suitable steps towards solving the car battery issues.

On most occasions, a cry for help from the car battery arrives in the form of one or the other problem as listed below:

  • You notice that the car headlights are often dimming. This means car batteries are unable to discharge enough power to power the headlights.
  • The vehicle refuses to start on turning the key in the ignition and most occasions require one to jump start the car.
  • You have to keep using the method in which the gas pedal needs to be kept pressed when starting the car.
  • Your car backfires regularly

Checking the car battery for the following signs might help you make an informed decision:

  • There are liquid bubbles occasionally seeping out through the battery terminals
  • The battery looks shapeless – especially swollen and bulging.
  • You can observe some sort of corrosion around the terminal caps
  • There is a foul smell coming out of the battery.
  • You observe a common phenomenon of condensation of acid drops all across the battery. It would look as if the battery is sweating.

Why do batteries leak?

batteries leak

Many car owners have perennially asked the question – “Why do batteries leak?” Car battery leaking issues occur mostly due to the age of the car or when the battery is often overcharged or because of the cold weather conditions.

When one talks about car battery leaking, it is the acid that comes out from the cell cap area or that which gives rise to the crack in the battery casing. One will also identify fluid leaks from various cracks in the battery. This leaking fluid is Sulfuric acid which is extremely corrosive in nature.

Sulfuric acid leaks happen in car batteries it is usually due to either the car battery being overused or overcharged. If the car battery has been in use for a long period of time, over and above the average period of use then car battery leaking cases have more chances of occurring.

The second reason why car battery leaking occurs is due to inadvertent over-charging of batteries. When the batteries are over-charged, the electrolytes inside reach boiling point and cause the acid to come out through the vent caps.

Since sulfuric acid is extremely corrosive, it reacts with the metal components in the battery and aggravates the situation. The terminals of the battery then are ruined. Though less reported there are other issues that might crop up. Even with the lead-acid batteries, overfilling of the chambers can result in solution overflowing and leaking out thus leading to the same situation. Another situation is where the over-charging leads to overheating of the battery plates, which then expand.

Car battery leaking has even resulted in the batteries bursting which might lead to serious accidents. Hence it helps to occasionally check the car batteries for leakages.

Experts studying why do batteries leak have come across other reasons too for the same. Incorrectly storing the battery can also lead to car battery leaking. It is often advised that car batteries that are being stored need to be fully charged and placed in a cool place. Car batteries kept in unventilated warm spots have been known to inflate, swell and overheat. The swollen batteries then crack and that can lead to the car battery leaking.

How to solve car battery leaking?

solve car battery leaking

Well, the right answer to this question is not to delay any action once you are clear that there is a definite car battery leaking issue in your vehicle. Battery leaks can be hazardous to both the vehicle and the passengers that often take a ride in the car.

The keyword here is prompt action even if you presume that the battery still has some amount of life and function left in it. The appropriate step to be taken is to immediately visit a certified mechanic who understands the use of high-quality replacement components as well as provides products that offer a substantial warranty.

Now in case, the mechanic says that it is only a minor issue say slightly corroded car battery terminals or a small issue of a narrow or negligible crack in the battery case and doesn’t need any major replacement, after verifying this maybe with a second opinion you can undertake the following steps to solve the car battery leaking issue:

  • Unhook the battery from both negative and positive terminals in that order to avoid an electric shock and do a check on the extent of corrosion and damage.
  • It would help to have a trained hand nearby to do the rest of the steps.
  • Keep all the necessary items that will help you solve this issue such as rubber gloves, goggles, baking soda, cleaning cloth, adequate amounts of water, sandpaper, sealant, a plastic pail or bin, wire brush, etc.
  • Once you have unhooked the battery or in case it is the battery case where it has to be uncapped, you can remove the electrolyte and store it in the bin. Be careful with the electrolyte as it contains sulfuric acid. Make sure the bin is coated with baking soda which will null the effect of the sulfuric acid
  • Apply some baking soda to the corroded terminals and pour some water over it. You will see a reaction taking place as the mixture bubbles and froths. If you are not comfortable with using baking soda, you may use a cleaning agent.
  • The next step is to remove the corroded particles by scrubbing them with a wire brush nicely and thoroughly.
  • In case the battery surface has cracked you might want to first clean the area with a dry cleaning cloth before applying the sealant to all the cracks. Wait till the surface dries.
  • Once you have completed the cleaning task wait for it to dry
  • The electrolytes that you took out might need replacement.
  • You would also be corking the battery caps and tightly securing them.
  • Once you are sure you have wiped clean the whole area and everything is dry, you need to charge the battery for a period of more than a day.

Now let’s look at the other scenario. In case the car battery leaking issue is serious, then avoid any sort of damage control and immediately replace the battery with a new one.

Disposal of the damaged car battery is also important. One shouldn’t throw away the old car battery in the trash as it might cause acid leaks and can cause lead poisoning as well as other environmental damage.

In conclusion

One might want to avoid prolonging any usage of a damaged car battery and driving the vehicle while a leaking car battery is connected. Car battery leaking issues should never be overlooked and immediate corrective action needs to be taken by the owner as mentioned above in case of appearance of any of the signs.

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