Q: Antifreeze problem

asked by on January 06, 2017

So I have a problem with my car it over heats and it has antifreeze I always make sure to fill it up but when I use it and check the antifreeze it smells like smoke when heater is on and when I take the cap of for the antifreeze the liquid starts rising like it's been conserved and let out like it's not going thru ?

My car has 52000 miles.
My car has an automatic transmission.

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

If you are having to periodically add antifreeze to the cooling system, there could be either an internal or external leak. That would include a "leak" through a faulty radiator pressure cap, which fault in the cap, if the fault exists, could be at least a part cause of the engine overheating. Coolant leaks are investigated in a cooling system leak diagnostic and estimated and repaired as required. Without examining your car’s cooling system, I cannot inform you as to whether the overheating (caused by, say, a stuck closed thermostat) is merely coincidental to the leak, is a cause of the leak or, even, in the case of a defective radiator pressure cap is a cause and a consequence of the leak. That is, in the latter scenario, if a faulty radiator pressure cap opens prematurely and doesn’t maintain adequate pressure on the cooling system, coolant will flow out from the cooling system into the overflow reservoir as a "leak", possibly even overflowing the reservoir and thereby eventually causing the car to overheat as the coolant level gets ever lower. At any rate, at the same time that a leak diagnostic, and pressure test is performed, all the usual causes of cooling system overheating would be diagnosed by the responding certified mechanic in an overheating diagnostic. Please let us know if you have additional concerns and we hope to resolve this for you.

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

Water pump

Hi there, thanks for writing in. Usually a stock water pump on a Toyota RAV4 should last much longer than 35,000 miles. However, there are times when the water pump can fail prematurely for multiple reasons. Since you have a...

The check engine light on for my 2005 Chevrolet Avalanche

Hey there, thanks for writing in about your 2005 Chevrolet Avalanche. If the gas cap was loose but then later taken care of, then the light may be due to another issue. You will need to have the Check Engine...

Sometimes my car starts immediately and sometimes it takes between 5 and 10 tries.

Your mechanic's diagnosis and explanation could well be correct. This is classic symptom behavior of a failing ignition switch. The contacts become "burned" over time and over lots of "start" cycles. The repair is to replace the ignition switch. ...

car overheating and heater blowing cold air plus hose to heater core not getting hot

If you replaced all those parts and it still is overheating then you have a radiator that is clogged and/or the fan is not working. You need to see if the upper and lower hose is hot when the vehicle...

Car overheating and heater blowing cold air.

When a car overheats, it is an indication that there is a problem with the engine cooling system. The purpose of the engine cooling system is to keep the engine at a temperature that is consistent. If the temperature of...

Failure code of P0723 OSS appeared

Hey there. This relates to a faulty output speed sensor inside your transmission. This is a unit that monitors the output speed of the shaft coming out of the transmission and relays this info to the transmission control module which...

Brake abs and traction control light on lost brakes today

Hello, thank you for writing in. The traction control system and the ABS work hand in hand to help keep you on the road in slick conditions. They are both monitored heavily by the computer which makes diagnostics a lot...

How can you tell if you have an intake manifold leak verses blown head gasket ?

Due to condensation within the engine, whitish discoloration on the underside of the oil cap is not unusual. If the oil in the oil pan is not coolant contaminated, you need not worry. If you have an external coolant leak,...

My truck is shaking.

Hello There, It sounds like you may have a faulty fuel pump that may have been damaged as a result of running it out of fuel. As you may know, today's fuel pumps require the fuel to keep them cool...

Related articles

A Buyer’s Guide to the 2012 Chevrolet Suburban
The The 2012 Chevrolet Suburban offers large amounts of space to carry around a growing family or to transport supplies to your favorite camping spot. It is available in heavy duty and half ton models. Key Features The 1500 Suburban...
3 Essential Things to Know About Your Car’s Temperature Gauge
A car temperature gauge shows how hot the engine is. If the temperature gauge reads high, your car could be leaking coolant or have a bad water pump.
2012 Chevrolet Impala vs. 2012 Toyota Camry: Which One Should I Buy?
In the battle for the family vehicle, the 4-door sedan is a strong contender that just continues to be a viable option even with the rise of the crossover SUV and the popularity of passenger vans. These sedans offer a...