Skip the auto shop - Our mechanics make house calls

Q: Battery with white buildup

asked by on

I've noticed a pretty big buildup of white gunk on my car battery. The car always starts up fine at first turn. Is it affecting anything? Should I clean it off?

Yes, you’ll need to clean the connections off because it will eventually start to corrode the metal.

In order to do this, take your battery terminals off, clean it really well with a wire brush that you can get at auto parts stores. Once you clean them reconnect the connectors on tight. Then buy a can of battery terminal corrosion resistance spray which you can also get at auto part stores. It’s usually a red spray. Once you apply the spray corrosion won’t occur anymore because it will seal battery acid from getting on the metal and prevent that white buildup you saw. It’s good practice to do this. You don’t want a bunch of corrosion accumulating under the hood.

If you need help with this or run into any problems with your battery, contact a certified mechanic who can help you ensure that your battery and cables are maintained for proper operation.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Battery leaking and car overheating

Hi. The battery can be serviced, but I recommend you replace the battery it to avoid further complications. Be sure that any fluid that has leaked onto other parts in the engine is cleaned up. The Check Engine Light most...

Q: Leak caused by corrosion on throttle body terminal

Hello. There are some fairly sensitive electronics inside the throttle position sensor (TPS) housing. They are also not engineered to be easily disassembled for repair either. Unless you are quite experienced at unsoldering and soldering printed circuit board connections, I...

Q: How do I clean the seat belts in a 2012 Hyundai Elantra?

The seat belts can be cleaned with a mild soap mixture and warm water. You should never use abrasive cleaning supplies such as bleach or dye, because they can decrease the strength of the seat belt. When cleaning a seat...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.