Q: Coolant leaking from somewhere. No clue where from.

asked by on

My coolant gradually disappears after about 100 miles, completely empties the overflow tank, did an oil change yesterday, and noticed coolant dripping from the skid plate. The oil was not milky at all, and no white smoke has ever come out. I can't seem to find the leak.

My car has 204738 miles.
My car has an automatic transmission.

Hello. Locating a coolant leak can be a challenge. The coolant system operates under a low pressure. When you need to locate a leak, you must create that pressure. There is a tool called a coolant pressure tester that can be used to do this safely without the vehicle operating. There are other methods such as putting dye into the coolant and using a black light to locate a leak. If you’d like, a certified YourMechanic technician can come to your location to inspect the coolant system, pinpoint the leak, and follow through with any repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Coolant leaking from somewhere. No clue where from.

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: Q: Leak

Without any information about the vehicle, I can say this. Many cars today have oil change intervals of 7500 miles and even up to 15,000+ miles. Going 7000 miles between oil changes is generally not going to be the cause...

Q: Low power and rough running. Check engine light flashing but no codes at download.

This may be caused by a few different things such as dirty fuel injectors, low fuel pressure or a dirty or failing mass air flow sensor. As you may know, dirty fuel injectors may cause intermittent fuel supply to...

Q: I am leaking all of my coolant near the rear passenger side tire. What could be the exact cause and how much to fix?

Hey there. This vehicle has a dual A/C and heat system. This means you has a complete A/C heat system mounted in the rear of the vehicle inside the passenger side. The rear system has A/C lines and heater hoses...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.