Q: Hi I have a coolant leak only seems to have when I remove cap it comes from underneath

asked by on

Hi I have a coolant leak I filled overflow and radiator the levels haven't dropped but this morning I removed cap then wen I checked it was a very small drip from underneath the car
My car has an automatic transmission.

The explanation for the drip when the cap is removed is that the cap seals the system and doesn’t allow the fluid to move. Think about it like this, when you put a straw in a drink, put your thumb over the top of the straw, and when you pull the straw up, it holds the liquid at the level in the straw. Then, when you remove your thumb, the straw is vented and the liquid is allowed to flow out the bottom. Basically, there is a leak in the system. It would be best to have a certified mechanic, like those available at YourMechanic.com, to pressure test the cooling system and identify where the leak is coming from.

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. Hi I have a coolant leak only seems to have when I remove cap it comes from underneath

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: AC problem on a '97 Isuzu Rodeo

That thing is almost 20 years old. It's 19 years old and it probably just needs refrigerant. You'll need to evacuate all the old refrigerant out, so you've got to have a recycling machine. Then you would put a factory...

Q: Used vehicle inspection, issues.

Check over the vehicle for all safety items on the chassis and cabin compartment. Make sure that the vehicle is safe to drive in any condition. I recommend that if you have to replace any suspension or steering components or...

Q: Cant I put manual hubs on my trooper?

Hi there. You can change the auto locking hubs to manual locking hubs as long as the parts will fit. Just keep in mind, by replacing the auto hubs with manual hubs, you will have to get out of the...

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.