Know if Your Car Has a Fluid Leak

Various fluids are essential for your vehicle to remain in good working order. Sometimes, when a part begins to leak fluid, it can be difficult to detect. There are a few tricks to catch a leak before it causes any major problems.

Steps

Detection by Spots

  1. Place cardboard, newspaper, or aluminum foil under your car. Are you noticing stains or puddles under your car, but aren’t sure what they are? This method can provide valuable information about any leaks your car might have.
  2. Allow the vehicle to sit parked overnight. This will allow time for any leaks that may be present to drip onto your material.
  3. Examine whatever material you put down. Note the location of any spots in relation to the car's tires. Knowing this can narrow down possible leaks.
  4. Inspect the color and consistency of the spots. The fluids in your car are all different. They also have different colors and textures.
    • If you notice light brown or black stains that are of medium consistency you are leaking oil. A few drops is normal, but anything larger should be investigated.
    • Reddish, light brown, or black stains that are near the center of the car is usually transmission fluid.
    • If the color is similar to the transmission fluid, but is located in the front of the car, it is your power steering fluid.
    • Finding a pale brownish stain that is very slippery would indicate a brake fluid leak.
    • A spot of brightly colored fluid is antifreeze. Coolant comes in a variety of colors including green, red and yellow.

Checking the Reservoirs

  1. Check your owner's manual for the types of fluid you can check at home. The manual should also tell you how much of each fluid you need, and the type of antifreeze your car uses.
    • If one of the warning lights is lit on your dashboard, you can check the manual for what the light indicates (usually oil or coolant). When one of these lights are on, it is a sign that a leak is possible.
  2. Park your car on level ground. If you are pointing uphill or downhill the fluid in your tanks may read more or less than is actually there. It is important to check fluids on level ground.
  3. Find the engine oil dipstick. In many vehicles it usually has a yellow handle. If you have difficulty locating the dipstick, look in your owner's manual.
    • Pull out the dipstick, wipe it off with a paper towel or rag, and reinsert it. Pull the dipstick out again and examine it horizontally. There are two indicator marks, one is the top level and the other the lower level. The amount of oil should be between these two marks.[1]
    • Wipe off the dipstick with a towel and place it back into the reservoir tank if it is at a normal level. If it isn't between the two lines, this indicates a possible oil leak.
  4. Find your engine coolant tank. Do this when your engine is cold, and look to see if the fluid level is between the hot and cold marks on the tank.[2]
    • Sometimes you may have to take off the radiator cap to see clearly, depending on the color of your tank. If the fluid is below the cold line or is completely empty, you definitely have an antifreeze leak.
  5. Locate your power steering fluid tank. This is the reservoir for your power steering fluid.
  6. Make sure the fluid is warm. Let your engine run at idling speed for a few minutes and turn the steering wheel back and forth several times.
  7. Turn the engine back off. This should be done before proceeding to checking your fluid levels.[3]
  8. Remove the power steering cap by turning it counter-clockwise. The dipstick is usually built into the cap with an indicator mark. If the liquid is below this mark or there's none on the stick, then you may have a leak.
  9. Track down your master cylinder (brakes) reservoir. There should be a marker line on the side of the reservoir. If you cannot see the fluid clearly, you can unscrew the cap and look inside.
    • If the fluid is very low or gone, you have a leak. It is normal to have a slight decrease in fluid if your brake pads are worn down. If you think this is the case, add fluid up to the fill line and monitor it for the next several days. If the amount of fluid changes you have a leak, otherwise you can assume that it was normal wearing of the brake pads.
  10. Check your windshield washer tank. Most tanks are transparent so you can see the fluid level easily. If you have a different type, consult your owner's manual for instructions.
    • Since you deplete your washer fluid more frequently, it can be difficult to detect a leak, but if you just filled it a week before and it is very low or empty, you probably have a leak.

See a Mechanic

  1. Watch for indications of an ongoing leak. If you are experiencing a leak that you can't fix you should call a schedule your car in at a local mechanic's shop.
  2. Pay attention to your warning lights. Even if you think you have repaired the leak, you may still need to see a mechanic if any warning lights stay on. This could be a sign that the leak is not fixed, or that a sensor needs repaired.
  3. Go to a mechanic. If you are not able to easily repair the leak, you should see a mechanic. All of the fluids in your car are essential for the safe operation of the vehicle.

Tips

  • A sweet smell inside or around the car indicates an anti-freeze leak.
  • Some cars do not have a transmission dipstick to check fluid levels. If any spots resemble transmission fluid, you need to take the car to a mechanic.

Warnings

  • Do not remove the radiator cap when the engine is hot. Doing so can cause serious injury.

Things You'll Need

  • Gloves
  • Paper towels
  • Cardboard, newspaper or aluminum foil

Related Articles

Sources and Citations

  1. ↑ http://www.consumerreports.org/cro/2012/12/how-to-check-your-car-s-engine-oil/index.htm
  2. ↑ http://www.cartalk.com/content/car-talk-service-advice-coolant
  3. ↑ http://m.supercheapauto.com.au/How-To/Oils-Lubricants/Checking-and-Adjusting-Power-Steering-Fluid/87

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