Skip the auto shop - Our mechanics make house calls

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

Described in question

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

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.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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
  • Home
  • Questions
  • Changed my headgasket and radiator on my 98 subaru legacy outback and my car starts overheating on long trips until heat is on 4

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: I'm stuck at my work and i think it's a radiator leak. Is it possible to get repaired today?

Without knowing what exactly is leaking and caused the overheating you would need to have a diagnosis done first and then see if the vehicle can be fixed where it is. If it is a radiator then the part may...

Q: Temperature gauge goes up slightly then back to normal

If you are not running the a/c system at the time you see the temperature gauge go above the middle of gauge and back down every few minutes then this is normal cycling of the cooling fan. If you turn...

Q: Do I have a damaged head gasket?

Hi there. This can be a bad head gasket or it may be something much smaller. If the coolant temperature gauge is staying in the normal range then it may just have a leak in the system. If there is...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...