Q: Overheating.

asked by on December 29, 2016

I am having an issue where my car is overheating. The Anti-freese is spitting out form the breathing hole of the resovior. Can a leaking resovior cause this problem. Or do I need a new thermostats.

My car has 375000 miles.
My car has an automatic transmission.

Thermostat Replacement $141.88 - $639.09 Get a Quote
Radiator Replacement $299.84 - $1239.51 Get a Quote

Hi There, This can be caused by a number of things such as low coolant levels, a faulty thermostat, a clogged radiator or a failing coolant fan switch. 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. If the thermostat is not working properly or is stuck closed, this will not allow the coolant to properly circulate through the engine, which may cause the engine temperature to fluctuate erratically or in some cases just remain hot. You may also have a water pump that is beginning to fail. Water pumps often times will begin to produce a bit of a whining sound when they are starting to fail. A common problem also associated with this is the water pump may begin to leak around the water pump shaft due to the seal being damaged. In addition to leaking around the pump, you may have a leak elsewhere in the cooling system coming from one of the hoses going to or from the radiator. By the car overheating, this can cause the coolant to be put under extreme pressure causing it to spew out of the breather hole as you describe. I would suggest having an expert from Your Mechanic come to your home to diagnose your cooling system.

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

My car is over heating and blowing cold air.

The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...

A rattle sound underneath truck when starting or when driving and speeding up

Hey there. This could be a variety of things as most cars tend to vibrate a bit which will cause bolts to loosen or fall out over time. Especially depending on a person's individual driving habits and conditions. There may...

I replaced the thermostat in my car but it still gets hot and the coolant keeps evaporating the fan kicks on I see no leaks what c

Claimed by Jeff Engstrom

My car gas pedal stop working. The engine power reduced turn on.

Hi there. The reduced power light is on for the computer putting the engine into limp mode for something went wrong. If your gas pedal is not functioning correctly, then the pedal has lost communication to the computer and to...

Flooded engine 1998 Chevrolet K1500

Hi - ouch, these problems make you crazy! Great effort on resolving the "sugar in the tank" recovery. I believe the fuel injectors in the throttle body have either failed (stuck open or leaking) due to residual sludge in the...

I just put a new alternator and battery and it still comes on what to do please help

Hello, thank you for writing in. The first step is to make sure all battery cable and alternator connections, are clean, dry, and tight. The second test is to have the vehicle scanned for diagnostic codes, in case there is...

I went to get oil changed at pep boys on the way home explorer began to supper and get hot and half the water in radiator is gone

The oil change should not have anything to do with your vehicle overheating. You will need to have the entire cooling system checked to see if you have a leaking hose, radiator or water pump or the thermostat housing? You...

How to remove a fuse box from the firewall on a 1988 Chevy S10? The screw was on the box under the dash and will not unscrew.

Hi there. If the screw is just spinning and not coming out, take a pry bar and put it under the fuse box and slightly apply a little pressure to the box and unscrew the screw. Then the screw should...

Intermittent airbag service light

Fault codes need to be read out of the SRS system to determine the cause of the Air Bag Light being illuminated. One common cause could be a faulty seat occupancy sensor. These are used to determine the firing logic...

Related articles

How to Customize Your Classic Chevy Pickup
There There are some vehicles that stand the test of time, proving they are functional, attractive, and in demand several decades after they were originally manufactured. One such vehicle is the Chevy pickup truck. The Chevrolet lineup has included...
Symptoms of a Bad or Failing Water Pump
Common signs include coolant leaks at the front-center of the car, loose water pump pulley, overheating engine, and steam coming from the radiator.
A Buyer’s Guide to the 2012 Chevrolet Tahoe Hybrid
Chevrolet Chevrolet has always had a good name when it comes to the vehicles they make, and that is doubly true for their SUVs. The 2012 Chevrolet Tahoe Hybrid has all of the great features that you would want from...