Leaks

  • By Lea Naiz
  • 28 Jun, 2017
Car leaks visual

6 Common Fluids That Can Leak from Your Car, and How to Diagnose Them

Sometimes cars leak, leaving ominous spots or puddles on the ground that can make you wonder if your vehicle is dying a slow death. The good news is: if you can master the art of “spotology” by deciphering those mysterious spots, you can tell whether the fluid leak is a harmless drip or a serious problem to be fixed ASAP. Here’s how.

There are three things to consider when it comes to those car leaks: color, consistency, and location (so you can tell if the leak happened from the front or back of the car). For the latter, The Car Guy says you can place newspaper or aluminum foil under your car in the evening and then “read” the spots the next day. This way, you can tell if the leak is power steering fluid (reddish or light brown, from the front of the car) versus auto transmission fluid (also often reddish or light brown, but dripping from the middle of the car).

The photo above, from Allstate, is a handy reference guide to six common car puddles you might encounter. Brake fluid is one of the most dangerous leaks to worry about. If you see a clear to brown and slick puddle under your car (it’ll be even more slippery to the touch than engine oil or transmission fluid), don’t even try driving it, but get it towed right away.

Your car’s brake system works on a hydraulic pressure system. Brake fluid serves as the hydraulic fluid that maintains that pressure. A leak in brake fluid will cause a drop in pressure, possibly resulting in brake failure. That’s not something you want to happen as you’re cruising down Dead Man’s Hill going 60 MPH.

Fortunately, in most modern cars, brake fluid leaks are rare. If you do have one, you’ll usually find it near the wheels or in the area directly under the brake pedal.

Knowing these leaks, and getting them repaired if necessary, can help you avoid more expensive repairs down the line (like replacing a grind-down transmission). It’s also something you should do before any trip. Hit up the links below for more details on what these spots mean.

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