Q: My Nissan Frontier truck is overheating. The smog technician said it needs a new thermostat. Would you like to take a look, give m

asked by on

Truck is overheating. I drove it for smog inspection yesterday and noticed the temperature went up to "H" while at idle waiting for the green light. Temperature returns to about normal when running. The smog technician looked at it said it needs a thermostat. Can you come to take a look?

My car has 155000 miles.
My car has a manual transmission.

Hello, thank you for writing in. If the overheating is only happening when you are at a stop, then you want to focus on the water pump and the cooling fans first. While the thermostat can cause overheating when it fails, its function is dependent on temperature, not engine RPM. The cooling fans however are meant to turn on and assist with cooling once the engine hits a certain temperature. If they are not turning on, when the vehicle sits idle, there is no airflow over the radiator to help cool off the hot coolant. Also at idle with lower RPMs, the water pump is not pumping as fast, and the flow of coolant is slower through the engine. If it is starting to fail, the colder coolant may not be getting pumped into the engine fast enough. Only further testing will tell, and the thermostat can also be tested if desired. For more help, contact our service department.

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 Nissan Frontier truck is overheating. The smog technician said it needs a new thermostat. Would you like to take a look, give m

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 recently bought a 2017 Nissan Frontier without auto headlig

According to Section 2-32 of the 2017 Frontier Owner's Manual, "even though the battery saver feature automatically turns off the headlights after a period of time, you should turn the headlight switch to the OFF position when the engine is...

Q: Problems after thermostat, digital cluster & cooling pump replacements

It appears you may have a few different issues going on. It seems unlikely that more than one cluster would fail. The most likely cause is a shorted wiring or open circuit causing the clusters to fail. If the car...

Q: How much should a rear differential cost to replace in a 2013 rogue

The part cost depends on which model you have (and which drive train options) but for a completely remanufactured axle (including the differential), the part cost is in the range of $1,200 to $1,800 roughly. If you repair what you...

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 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...
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.