Q: Car runs hot after short drive. Replaced thermostat and radiator fan assembly.

asked by on

Hello, While idling one day my fan and fan assembly for the radiator broke. I replaced the thermostat and fan and fan assembly.

I refilled the reservoir with coolant and the car runs hot after about 2 miles in stop and go traffic.

the reservoir is cool and the hoses on the hose leading from the reservoir are cool. However, the hoses by the thermostat are hot.

The car leaks out about a teaspoon of coolant after short drive from the front of the car yet, the reservoir still shows full.

Please help.

My car has 178000 miles.
My car has an automatic transmission.

It sounds like you may have a water pump that may not be pumping correctly or may be failing. Generally, when a water pump is going bad, you may hear a bit of a whining sound combined with the pump leaking. The most common place for the water pump to leak from is the pulley shaft seal which is in the front of the pump where the shaft comes out of the pump housing. When the pump is leaking, it will typically cause the engine to overheat as well. I would recommend having an expert from YourMechanic come to your location to diagnose and replace your water pump.

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. Car runs hot after short drive. Replaced thermostat and radiator fan assembly.

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: The car suddenly reduces speed and finally stops moving after driving for 30 minutes to an hour. The the radiator becomes very hot.

Hi there. It seems that the engine is overheating while you are driving. Check the cooling fans and see if they are working when the engine is hot. If the cooling fans are not working, then check the fan relay...

Q: Transmission shifts early

Hello. If the fluid is really dirty and if its integrity is broken down then it can affect the shifting. There are also other parts of the transmission control that can cause this. It can also be caused by a...

Q: Battery keeps blowing fuse.

It sounds like there is an electrical short in your starting system. The power needed to start your vehicle is not traveling its intended path. This power may also be traveling to a circuit not meant to handle that much...

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...
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...