Q: 2006 Xterra 4x4, 4.0L V6. Engine is overheating. No coolant leaks. Replaced thermostat. Flushed radiator. Fans work. What to do?

asked by on

06 Xterra with 97K miles. Just had tranny rebuilt. Within 10 miles of tranny shop it overheated. Never had heat issues before. I replaced the thermostat and flushed the radiator. Filled with fresh coolant. Next day engine ran at normal temp for 40 minutes of driving to and from work. Overheated in the driveway when I got home. There are no leaks of any kind. The tranny shop said they found no signs of water or coolant in the tranny. The serp belt has proper tension. Water pump shows no signs of failure. Pump/fan shaft is tight and spins freely with little pressure. When it gets hot the coolant in the reservoir looks/sounds like it's boiling. Rad and reservoir cap fit tight. The main fan appears to be working but at what % i dont know. Elec fan comes on when heat rises. So frustrated! I'm not sure what to do next. I am considering the fan clutch but not sure how to troubleshoot that. What could be causing the overheating? I'm mechanically savvy but never messed with the coolant system.

My car has 97000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. Overheating issues are very frustrating. When in this situation, you will want to go ahead and test the radiator cap and make sure it is regulating pressure correctly. Secondly, the water pump needs to be tested or replaced. Although it may seem like it is working, it may not be pumping enough coolant through the system to keep up with heat transfer needed. You may also want to check the oil and make sure it is in good condition, as the oil plays a large role in regulating engine temperature as well. For more help with diagnostics, contact our service department to schedule an appointment.

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. 2006 Xterra 4x4, 4.0L V6. Engine is overheating. No coolant leaks. Replaced thermostat. Flushed radiator. Fans work. What to do?

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 have an 08 Nissan Xterra. There have now been a couple of times when while driving the vehicle at low speeds it shuts off

Hello, thank you for writing in. There are several reasons the vehicle may not start right away after stalling. Typically this is a sign that your engine is missing a critical component such as air, fuel, spark, or electrical power....

Q: Hi man.. I own a 2007 VW Passat 2.0, I got check engine light showing code p2181 cooling system error. Should I change only the th

Hello. A P2181 cooling system code is really generic, and all it means is that the cooling system is too hot or too cold. Unfortunately that does not give you much to work with. Check the level of your coolant,...

Q: tranny mount or solenoid

I watched your video and unfortunately it doesn't give me the information I need. I do like the initiative though. In the future, which will be hard to record, I need to hear what the motor sounds like in the...

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 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...
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...