Q: Engine overheats, heater blows out cold air, coolant boils in radiator

asked by on October 17, 2016

My engine overheats and the coolant boils and the heater in my truck blows straight cold air. I at one point drained my coolant completely with the plug on the bottom of the radiator and seen that it was dirty. I'm wondering what it could be? Do a thermostat replacement? Do a radiator complete flush? Or do both thermostat replacement and complete radiator flush?

My car has 177438 miles.
My car has an automatic transmission.

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

Door stuck

Without seeing the nature of the accident damage it will be hard to determine the cause of the door issue. A body panel pushed into the door, like a fender, may be able to be repositioned to restore door operation....

I installed new thermostats in my 2007 Nissan Altima 2.5l shortly after the car started to overheat so I put back the old t-stats

The best thing to do first is put the new thermostats back in the engine. Old thermostats are damaged when they come in contact with the ozone layer outside when they have been running in the engine for a long...

Cylinder misfire and white smoke

The faint white smoke may indicate the possibility of a blown cylinder head gasket. A blown head gasket may cause a number of different symptoms. Coolant in the engine oil, an engine misfire or oil leaking from the engine could...

Engine feels like it is getting no fuel and won't start.

First, it must be determined whether you have an engine that doesn't crank at all, or an engine that cranks but doesn’t start. If the engine doesn't crank at all, you have a problem with the starting/charging system or the...

When A/C is on, the car overheats

Engine overheating with AC on is generally caused by one of two possibilities. One, is increased engine load caused by a failing AC compressor. The AC compressor adds rotational load to the engine and if the compressor is wearing and...

My 98 Dodge neon fuel pump fuse keeps blowing?

If the fuel pump fuse keeps blowing then the most common cause of this the fuel pump in the tank is drawing too many amps and blows the fuse after it overheats. Replace the intank fuel pump and the filter....

Car is overheating, smoking, and now radiator fluid is spitting through the heater.

Hi there. Sounds like the heater core has a leak and needs replaced. I recommend removing the heater core hoses to the heater core on the firewall in the engine compartment and routing the hoses together until you replace the...

P0201 and p0301 code with new injector, coil, sparkplugs and wires and replaced ecm

Hi there. As you already know, replacing components without diagnoses can be expensive and time consuming without resolution. Circuit testing for the P0201 (#1 cylinder injector circuit fault) code needs to be performed to isolate the injector circuit fault. This...

I have a leak of water coming from my motor do I need a head gasket my car keeps running hot

Hello. Though there are a lot of areas that can leak coolant on this car, it is common for the head gasket to fail and cause this. If the leak cannot be easily seen I usually pressure test the system...

Related articles

How to Buy a Good Quality Gasket
There There are a wide variety of gasket types on a typical vehicle, from head gaskets which are installed between the cylinder head and the engine block to engine gaskets which seal out harmful elements and keep the engine safe...
2011 Dodge Ram vs. 2011 Ford F-150: Which One Should I Buy?
Large trucks can be fun to drive, and even more fun to get dirty. Unfortunately, they may also cause you to get phone calls from friends who need to move into a new apartment. Fortunately, just having a truck may...
Symptoms of a Bad or Failing Thermo Coolant Fan Switch
Common signs include engine overheating, the Check Engine Light coming on, and a broken or shorter signal wire.