Q: My car continuously overheats and blows the radiator cap

asked by on

I have changed the thermostat, the water pump, the fan clutch and flushed the radiator but it's still overheating. What could be the issue?

My car has 150000 miles.
My car has an automatic transmission.

It sounds like you may have a restriction in your cooling system that is preventing the proper flow of coolant through the engine.

I would recommend having the system power flushed to remove any restrictions that may exist. The restriction is likely in the coolant passages inside the engine if the radiator and water pump have already been replaced.

If the power flush does not resolve the issue, it is possible that the engine may require an overhaul from a qualified professional in order to resolve this issue.

I would suggest having this overheating issued diagnosed by a certified technician, such as one from YourMechanic, for an accurate repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My car continuously overheats and blows the radiator cap

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: Transmission hesitation problems only in reverse

One thing you may want to look at, especially since the transmission has been changed several times, is the shift cable. It is possible that the cable has stretched, and that the transmission may not be fully engaged in reverse....

Q: Car will not start after alternator replacement?

The backfire sound usually indicates a misfire of some kind which may be related to a timing issue such as a faulty ignition coil, bad spark plug wires or a faulty crankshaft position sensor. This may also possibly be related...

Q: Q: Heater is not working

The lack of heat being generated by your system may indicate a clogged heater core. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator like unit that circulates the hot coolant from the engine through the heater core which then uses this...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...