Q: Overheating car no leaks

asked by on January 03, 2017

My car got overheated and it was because it was low on coolant so I added more and the car still kept on over heating. Next morning the coolant just low again it was lower than the minimum. What can I be or what can I do ?

My car has 1150040 miles.
My car has a manual transmission.

Car is overheating Inspection $79.99 - $89.99 Get a Quote

The cooling system, including the radiator pressure cap, should be pressure tested to determine if there is a leak. Leaks can be outwardly visible (external) as well as hidden (internal) in a circumstance for example where the cylinder head gasket(s) or intake manifold gasket (in some applications) is leaking. In addition to a leak, your car should also be evaluated for overheating. It is possible, for example, to have a stuck closed thermostat that causes the engine to overheat and a consequence is pressure rises in the cooling system, the radiator pressure cap opens while driving, and so much coolant is expelled into the overflow reservoir that it flows through the overflow tube onto the ground when you are driving. Eventually, the coolant gets low enough that it doesn’t leak out further in this fashion and so you think there’s no leak when you stop and park the car. In this scenario (stuck thermostat), maybe there isn’t a leak but the car is overheating and that will damage the engine. The best thing to do is request an overheating diagnostic and the responding certified mechanic will check for leaks as well as investigate the overheating possibility.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

I cannot get my bluetooth to work

Hello, having a convenience feature not working properly can be annoying, especially when it has to do with the entertainment system. It appears that Mazda has recognized this issue in Technical Service Bulletin (TSB 09-008/15) to resolve issues with the...

Transmission over temperature and truck doesn't start.

I have seen this concern with your Jeep Commander before, not only through my own personal experiences, but also from other certified mechanics working on this vehicle. Through some tag team diagnostic skills, we were able to determine that one...

How can I tell if it's the throttle body or the transmission at fault?

Hi and thanks for contacting YourMechanic. Check the fluid to the transmission, and look at the color of the transmission oil and see if it is red or dark red. If it is dark red (varnished), then change the oil...

Car engine recently overheated 2006 Ford Focus

Hi there - yes, it is normal for the AC compressor to cycle on and off. If it is doing this frequently however, like every 10-15 second or so, this can be an indication that the refrigerent level is low...

Oil burning off 1 1/2 quarts every 200 miles

Hello there, thank you for asking about your 1994 Isuzu Pickup. For your vehicle, minimum compression is 114 PSI and all cylinders should read within 70% of each other. So, according to your results, compression is good. My guess is...

Difficulty starting 1992 Volvo 740 when the engine warms up

The fuel pressure on your 1992 Volvo 749 should be checked to make sure it is within proper specifications. If there is a clog or malfunction in the fuel system, the car may experience a poor running situation or may...

Have a 2008 Hyundai Sante Fe and it starts when the key is in position II instead of III and makes a click sound when turning off

Hi There, It sounds like you may have a faulty ignition switch that may be causing the ignition to send power to the starter inadvertently rather than kill the power to the ignition like it is supposed to when turning...

Humming sounds during driving over 30 mph

The inner and outer edges of the tire tread wall on the affected side where the noise is coming from needs to be inspected for a cupping or cupping wear pattern. These types of wear patterns can produce a noise...

accidentally added windshield washer to coolant line instead of washer tub, just a little, maybe 1/8 of a gallon.

Hi there. A little window washer fluid will not cause any damage to your engine or the cooling system, in fact it will actually make the system work a little better as the fluid has alcohol in it. Alcohol will...

Related articles

Is it Safe to Drive With a Leaking Gas Tank?
A leaking gas tank can be caused by a number of different things, such as rocks or sharp objects your car picks up...
How Long Does an AC Accumulator Last?
Your Your vehicle’s air conditioning system is a complex system of components, each of which plays an important role. However, not all the components will continue to work properly if they come into contact with moisture, and that is where...
Symptoms of Bad or Failing Intake Manifold Gaskets
Common signs include the engine constantly overheating, coolant leaking, engine misfires, and a decrease in power, acceleration, and fuel economy.