2006 Nissan Xterra Water

Are you putting coolant/water in the radiator or just in the overflow jug? I don't understand what you mean by it won't flow through the hose?

On you radiator you have 3 hoses(excluding oil and transmission lines if your radiator is equipped with an oil cooler and trans cooler or both)You have the upper radiator hose lower radiator hose(both big hose) and the over flow hose(little bitty hose) up top on the neck of the radiator right under the cap. Which hose is the coolant not flowing through?And how do you know its not flowing?If its not flowing from the little bitty hose from the radiator into the over flow jug than you need a new radiator cap. If it aint flowing through the upper or lower radiator hose you have 1 of 3 problems or maybe 2 or all3 problems. Always tart with the easiest cheapest thing first. First replace radiator cap(it could be stuck closed), 2nd replace thermostat(it could be stuck closed), 3rd replace radiator(it could be stopped up)#rd replace water pump(it could be worn out and not circulating coolant through the system properly)

I know I listed 4 problems and said that it could be 1 of 3 problems. The first thing(replace cap) is the solution for not flowing to the over flow jug and should not have been included in the solutions for coolant failing to flow through upper or lower hose. Sorry for any confusion.