Skip the auto shop - Our mechanics make house calls

Q: Overheating

asked by on

My father and I replace the thermostat on my vehicle over the weekend. This was Saturday. We both inspected my vehicle after it running hot a couple time. and came to the cheapest conclusion. Replace the thermostat. Low and behold when we removed the the thermostat from the housing the gasket was worn. And it was closed shut. We were pretty excited that we guessed correctly. We replaced the part and it ran fine for about 25mun with out over heating. The next day I perpared to go to work and it start to run hot about 5 ,miles from the house . Later that evening we relived some of the air pressure from the water pump reserve to see if that was the culprit. But it didn't help much. I have no leaks under the car and no cloudy oil that would indicate a blown gasket or cracked head. Please, what do you think the prob could be?

My car has 227000 miles.

A: This can be caused by a number of things su...

This can be caused by a number of things such as low coolant levels or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time or sometimes not at all. When this happens you will notice a temperature spike and drop occasionally as the fan comes on and off.

When driving down the road at a decent speed, the temperature level may stay relatively low due the cooling effect of the wind passing through the radiator. When the car sits still at an idle, if the cooling fans are not working properly you may notice the temperature spike a bit due to a lack of air flow to help cool the radiator down.

To avoid any unnecessary repairs, I would suggest having an expert from Your Mechanic come to your home to diagnose your cooling system and help you make the right repair.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: My car over heats

Be sure not to drive the car if it is overheating because overheating can warp the cylinder head and/or engine block causing costly damage. The most common causes of overheating include low coolant level (including that due to leaks), a...

Q: Rough idle at stops lights and when parked

This may be a sign of a faulty MAP sensor. The Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal that is proportional to the amount of vacuum in the intake manifold. The engine computer then uses...

Q: How do I use the automatic dimming rearview mirror?

The rearview mirror is a very important safety feature that offers you visibility out of your rear window. However, at night, the glare from other vehicles reflects off the mirror, and can lessen your visibility. To limit this glare, your...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.