You can often tell what's leaking under your car by the color and feel of the fluid. Clear and watery is usually AC condensation and normal, while brown or black oil, green, orange, or pink coolant, red transmission or power steering fluid, and yellowish brake fluid all mean something should be checked. Hillside Auto Clinic at 26122 Western Ave, Lomita, CA 90717 can find the source of a leak; call (310) 956-5794 or schedule.
How to check what's leaking
- Park on a clean, dry spot overnight and slide a piece of white cardboard or paper under the engine area.
- In the morning, look at where the drops landed (front, middle, or rear, and which side).
- Note the color, whether it's thin or thick, and if it has a smell.
- Take a photo to show the technician.
Where the spot is matters almost as much as the color. Drips near the front usually come from the engine, radiator, or AC. Drips in the middle can point to the transmission. Drips near a wheel can point to brakes or a shock.
Fluid colors and what they usually mean
- Clear and watery, no smell: usually water from the AC system, often under the front passenger side after running the AC. This is normal.
- Light brown to black, slick: engine oil. Common sources are the oil pan, drain plug, filter, or valve cover gasket.
- Green, orange, pink, or yellow, sweet smell: coolant (antifreeze). Leaks can come from the radiator, hoses, water pump, or heater core. Coolant is toxic to pets and children, so clean it up.
- Red or pinkish-red: often automatic transmission fluid or power steering fluid. Bright red is usually fresh; brownish red can mean old fluid.
- Clear to yellowish or light brown, slippery: possibly brake fluid, especially near a wheel or under the brake master cylinder. Treat this as urgent.
- Blue, thin: usually windshield washer fluid. Not dangerous, but the reservoir or a line may be cracked.
- Thick, dark, strong smell: could be gear oil from a differential or manual transmission.
- Gasoline smell: a fuel leak. Don't drive the car or let anyone smoke nearby, and have it checked right away.
Colors can change as fluids age or pick up dirt, so a color guide is a starting point, not a final answer.
Which leaks are urgent?
Stop driving and call a shop if you see brake fluid, smell gasoline, see a large puddle forming quickly, or notice warning lights like the temperature gauge rising, the oil pressure light, or the brake warning light.
Get it checked soon for oil, coolant, transmission, or power steering drips. A small leak can turn into a big repair if the fluid gets low, like an overheated engine or a damaged transmission.
Usually fine is clear water from the AC on a warm day.
Why leaks happen
Gaskets, seals, and rubber hoses harden and shrink with age and heat. Stop-and-go South Bay traffic and lots of short trips add heat cycles that wear them out. Loose drain plugs or filters after a service, road debris hitting the underside, and corrosion on metal lines can also cause leaks.
What we check
A technician will look at fluid levels, clean the area if needed, and trace the leak back to its source, since fluid often runs along the underside and drips from a different spot than where it started. You'll get an explanation of what's leaking, how urgent it is, and the options for repair.
Hillside Auto Clinic is open Monday–Friday 8 AM–6 PM and Saturday 10 AM–3 PM (closed Sunday). Visit us at 26122 Western Ave, Lomita, CA 90717, call (310) 956-5794, or email hillsideautoclinic@gmail.com.
Call or schedule
Seeing spots on your driveway in Lomita, Torrance, Harbor City, or anywhere in the South Bay? Call (310) 956-5794 or book online. Tell us the color and where the drip is, and bring a photo if you have one.
FAQ
Is it normal for water to drip from my car?
Yes, clear water dripping near the front passenger side after using the AC is usually normal condensation.
What color is an oil leak?
Engine oil is usually light brown when fresh and dark brown or black when used. It feels slick between your fingers.
Can I drive with a coolant leak?
A small leak may let you drive a short distance, but if the coolant gets low the engine can overheat. Watch the temperature gauge and have it checked soon.
Is a brake fluid leak dangerous?
Yes. Losing brake fluid can make the brakes feel soft or stop working well. Don't keep driving; have the car checked right away.
Why does my car only leak when it's parked?
Many leaks are easier to see when the car sits, because fluid drips in one spot. A leak that shows up after parking still needs attention.
