Q: My 05 equinox is overheating. Refilled coolant reservoir this morning for the reservoir was empty, but I cant find any coolant. Now heater is blowing cold.

asked by on

When I drive the dash says overheating and heater is blowing cold. I refilled the coolant yesterday and it ran fine but the reservoir was empty this am. I've read it could be thermostat, the heater core, head gasket leak, or just a coolant leak but I haven't found any coolant....

My car has 195000 miles.
My car has an automatic transmission.

Hi there. If the engine is overheating to almost at the red line but not there, then the issue would be the thermostat and leaking out the blow by hose. If the needle is going into the red line, then the coolant could be leaking out of a freeze plug and burning off on the exhaust or leaking into the engine causing the oil to mix. Check the engine oil and see if it is milky. If the oil is milky, then there is coolant getting in the oil through the intake gaskets or the head gaskets. If you need further assistance with your engine overheating, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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. My 05 equinox is overheating. Refilled coolant reservoir this morning for the reservoir was empty, but I cant find any coolant. Now heater is blowing cold.

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: This situation happened to me and I drove it to a mechanic. He said I had no coolant and my engine is blown, that I need a new eng

Overheating, if severe enough, will damage an engine. The term "blown", though, is not a technical term and thus means nothing in particular except that the engine, according to that mechanic at least, is "damaged". Typically, in the worst cases...

Q: Car sputtering occasionally

A common problem for your vehicle is a misfire condition causing a sputter. Ignition coils or spark plugs will often go bad. I would ask one of the mechanics at YourMechanic to come to you and diagnose exactly what is...

Q: 93 Oldsmobile Cutlass supreme won't start.

Hi there. Check the camshaft and crankshaft position sensors and make sure that they are plugged in. If the engine is cranking but not starting then the crankshaft position sensor could have failed. Also, check the mass air flow sensor...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...