Skip the auto shop - Our mechanics make house calls

Q: Car overheating - 1999 Nissan Sentra

asked by on

When I start my car and drive the temperature gauge is fine, but when im at idle it overheats, I replaces the radiator hose and water pump. And when my car does overheat water shoots out the coolant reservoir
My car has an automatic transmission.

This may be a sign of a faulty coolant fan relay. This relay receives input from the coolant temperature sensor which reads the temperature of the coolant in your radiator. As it reaches a certain temperature, the cooling fan relay receives a signal to turn the fans on to help cool down the coolant flowing through the radiator. When your car is moving down the road, the coolant is also cooled down simply by wind passing through the radiator. When it is sitting still, without the help of the wind when the fan is not working properly, it may overheat as you have experienced. I would recommend having an expert from YourMechanic come to your location to diagnose the cooling system so that this can be addressed appropriately.

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: Car will blow cold air but will not blow heat

The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...

Q: My car will not accelerate past 20 mph. No check engine is on and I just replaced ignition coil 06 Kia Rio base

This issue could be occurring for several different reasons. Firstly, it is possible that there could be an issue with the spark plugs and wires. On a four cylinder engine only one or two bad plugs can cause the engine...

Q: What is the cost ro replace a bad gas sensor.

Hi There, Assuming you are referring to the evaporative emissions control system, a common cause of failing an emissions test is the vent valve solenoid not working properly in your car's fuel tank emissions control system. When this is not...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...