Skip the auto shop - Our mechanics make house calls

Q: Car gets hot

asked by on

The car gets hot on the interstate but only after you reach 70mph or more and when the cat is at an idle it does not get hot but if you take the cap off the resevore the coolant just pours out now my question is. Does that mean I have a blockage?

This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time or sometimes not at all. When this happens you will notice a temperature spike and drop occasionally as the fan comes on and off. When you take the cap off, the coolant will naturally want to come out due to the intense pressure build up from the heat. If you’d like to have this fixed, I would suggest having an expert from YourMechanic come to your home to diagnose your cooling system and help you make the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Car gets hot

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: Coolant leaking

It would not be recommended to drive your car for 100 miles with coolant leaking. Generally coolant leaks can be very unpredictable ranging from getting progressively worse over time to instantly getting worse very quickly. The risk of driving this...

Q: On the thermostat housing on a 2013 Journey, which way does the gasket end seal to? Does it seal to the part connected to the hose?

Installing a thermostat upside down will cause the engine to overheat. Although not impossible, the thermostat will fit better one direction than the other. The coiled or spring loaded end needs to go into the engine block. The end with...

Q: Charging system

Hi There, It sounds like you may have a bad voltage regulator that may be causing the alternator to fail to properly charge the battery. The voltage regulator is a unit that regulates the charging of the battery by the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...