2006 xterra over heats after using blue devil

Check what other vehicles use that engine then Google again

yes The only solution is repair

Very very helpful thank you so much
I accidentally ran up on this site and I am so glad that I did I will definitely be using you guys for a lot more jobs once again thank you so much

Needless to say you have not found the right shop yet.
You need to know if the water pump is pushing the coolant thru the system, is the system full of coolant and no air pockets, and is there excessive pressure in the system.
Do the radiator hoses and heater hoses get hot when the engine warms up ?
Are you sure the system is full of coolant ?
Do the radiator hoses swell up when the engine gets hot ?

sounds like the radiatior is partially blocked internally or maybe the airflow through the matrix try that first

Where is the fuel filter on a 2006 Nissan xterra?

water pump fins are worn, therefor you need higher rpm to move coolant faster. just change water pump

It sounds as if your blower resistor has an open in it. You will have to replace it. It is located on the passenger side under the dash near the blower motor. I will have four wires going to it. The colors of the wires will be blue/white, blue/black, blue/red and blue/yellow. I will be held in with two screws. When you pull it out it will appear to be as thin as a credit card. Replace it and it will repair your problem.

GO TO A OREILYS AUTO PARTS OR AUTOZONE THEY CAN SELL YOU WHAT YOU NEED FOR ABOUT $30 DOLLARS AND MAY HELP YOU DO IT IT JUST PLUGS IN TO THE WIRING YOU HAVE

I just changed out a tailight on my 2000 Nissan Xterra, so I assume it may be similar. You have to pop the plastic strip which runs across the back. There are pop rivits in it.