Q: Changed my headgasket and radiator on my 98 subaru legacy outback and my car starts overheating on long trips until heat is on 4

asked by on February 09, 2017

Described in question

My car has 120000 miles.
My car has an automatic transmission.

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

The most common causes of overheating include low coolant level, a faulty thermostat, a plugged radiator, a faulty radiator pressure cap, collapsed hoses, non functioning cooling fans, and a faulty water pump or drive belt. Certain engine faults, such as a leaking head gasket or poor engine running condition can also cause overheating. Unfortunately, even though you replaced the head gasket, a fault there cannot be ruled out, unless of course the overheating is found to be due to the other causes I listed. If the thermostat was not replaced when you changed the radiator, that is certainly a possibility especially if the thermostat was previously run in an overheating engine (overheating is known to damage thermostats). If you desire that this problem be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an engine overheating diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help 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

Driving in heat towing a trailer and suddenly the car smells strongly like nail varnish? Adjusted A/C and

The catalytic converter may be getting overheated and turning cherry red, causing the hot floor and burning smell. The engine may be running too rich which can cause this problem as well. Also, towing the trailer can overheat the transmission....

getting heated fastly and smoke is coming out can i drive with this problem for 30 miles by pouring water

If you are having an overheating problem and have leaks, then I suggest you have a mobile mechanic come to you or have a tow truck transfer the car. If you try and drive it, you may overheat the engine...

Fuel pump fuse overheats

If you have changed something in the system recently, that may be the cause. Otherwise, the fuel pump, and its wiring, needs to be checked; the problem is likely due to a faulty pump, or a short in the wiring,...

My car jerks when I'm going 50-60mph and sometimes dies right after I start it up, when I'm in park or reverse.

Hi there: On late 1990's Nissan's and Infinity models, there are sometimes issues with electrical relays that transmit electrical signals from the power source to individual components. I'm not sure if this is exactly what is going on with your...

Batery drains sitting in driveway with engine off.

If you request a parasitic power draw diagnostic the responding certified mechanic will track this down for you and let you know of the required repair. First, the battery needs to be load tested to exclude the possibility that you...

Car overheated on highway then died while I was coasting it to a stop.

Hello, thanks for writing in. While the cracked radiator and head gasket can be related, you are more concerned with the extend of the damage to the engine. The head gasket and radiator can be replaced, but the interior of...

Cooling fans not working

If your cooling fan is inoperative, I would start by having a mechanic check the fan for power. If the fan is getting twelve volts but does not work, the fan is faulty. If the fan is not getting battery...

I have a high pitched squeal when i accelerate, gets worse as rpm raises, new water pump and timing belt

It's possible that the water pump that was installed is faulty. The best way to determine this is to use a mechanic's stethoscope and use it on different areas of the engine to determine where the sound is coming from....

How do I properly install a transmission pan back on?

When installing the pan, the mating surfaces of the transmission and the pan should be clean, dry, and free of debris. To assure a good seal, I will usually use some brake cleaner, acetone, or any other type of solvent...

Related articles

The Best Used Cars to Buy If You Live in a Cold Climate
If If you live in a cold climate, likely one of your biggest concerns when you are considering which used vehicle you should buy is how well it will perform in snowy, icy conditions. We have evaluated a number...
Symptoms of a Bad or Failing Cooling Fan Relay
Common signs include the engine running hot and cooling fans either not functioning or running all the time.
Symptoms of a Bad or Failing Radiator
Common signs include leaking coolant, vehicle overheating, sludge, and low coolant.