Q: My car it's overheating when i open theradiator cap it's empty andReservoir overfilling heater blows cold air after awhilegetswarm

asked by on February 01, 2018

My car it's overheating when i open the radiator cap it's empty only air, i fill it but looks like the water goes to the reservoir then out the reservoir it's full it doesn't get empty , the heater blows cold air after a while gets warm , i replaced ths radiator cap and radiator, thermostat, heater core . There is no water in the oil , also no oli in the water, everything looks good .

My car has 175000 miles.
My car has a manual transmission.

If you do not have an external leak anywhere you can find and keep getting low on coolant then you have a blown head gasket and may need major engine repair for head gaskets and possible head damage. Have a coolant pressure test to find the leak and then a repair to fix the problem can be done.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Power steering fluid leaks
The steering gear leaking is best serviced by replacing it with a new or remanufactured unit. The hoses should be checked also. I recommend you have a mechanic like one from YourMechanic inspect your vehicle for power steering leaks (https://www.yourmechanic.com/services/power-steering-fluid-is-leaking-inspection)....
My rpm needle moves down a little then up when im at a red light.
Many early 2000's Jaguars, including the X-Type and X-Type (R) had issues with faulty O2 sensors (https://www.yourmechanic.com/services/oxygen-sensor-replacement), air fuel sensors (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-air-fuel-ratio-sensor), and ignition sensors that would cause similar symptoms to what you're experiencing. However, an idle control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) that...
Type of engine oil
Thanks for writing in about your 2015 Hyundai Veloster. Yes, this should always be used when stated by the manufacturer. Turbocharged engines create a lot of power which generates heat and stress. Synthetic oil (https://www.yourmechanic.com/article/what-type-of-oil-should-i-use) has the properties in it...
No cooling, advised changing compressor. System is 3 years old - should it go bad so quickly ?
Unfortunately it is not unheard of for R134 converted vehicles to go through compressors (https://www.yourmechanic.com/services/ac-compressor-replacement) more frequently. R134 requires higher running pressures than R12 did. Two things to make sure of this time around for longer compressor life. Make sure...
Does this car have a PCV valve?
All cars that have internal combustion engines have Positive Crankcase Ventilation (PCV) valves. On your car, the PCV valve is at the top of the engine in the valve cover. It is pressed into a rubber grommet. You will see...
Water boiling out of the radiator cap
If your cooling fans are not coming on, this suggests that either the fans themselves are faulty, the relay switch is not working properly or the coolant temperature sensor is not working properly. If the car is still overheating, this...
Cruise control has not been working for a while.
Hi there. First check to see if the cruise control fuse is blown. Then check the brake light switch (https://www.yourmechanic.com/services/brake-light-switch-replacement), the brake pressure switch, the speed sensor on the transmission (https://www.yourmechanic.com/services/speed-sensor-replacement), or the cruise control buttons. Most of the time...
Installing a new distributor and need to get cyl. 1 at tdc how do i acheive this while making sure the rotor is set at #1?
The easiest way I have found to do it is to mark on the intake where number one wire is on cap. Put mark on intake. Also not the distributor wire connector orientation and mark where it is also. Remove...

Related articles

The Best Used Cars to Buy For Fuel Economy
Saving money on gas is an important factor to consider when buying a car. The Honda Civic, Toyota Prius, and Ford Fusion all have great fuel economy.
The Best Used Cars to Buy If Your Kid's On the Soccer Team
If If you are a soccer mom (or dad), you know that you need a lot of space to transport your budding World Cup contenders, along with their gear. From time to time, you can also expect to be bringing...
The Top 5 Selling Cars in California in 2012
California California natives are notably environmentally conscious, and this often shows in their choices of vehicles as well. While trucks rarely make it to the top spots, hybrid vehicles are frequently on the list. Though previous years have seen the...