Coolant leak my car is loosing coolant i have to refill it about every week i have looked for any leaks and have not found anything i recently replaced the thermostat and noticed there is no pressure coming from the thermostat to the radiator which leads me to believe that the water pump is the issue if that is the case then i am still not sure why or where the coolant is going does this sound like a proper diagnose

SOURCE: running hot

Radiator Fan Control Relay Switch. I bet your electric fan doesn't run?

SOURCE: Have a 2005 Pathfinder with

sounds like trans cooler in radiator has breached leaking coolant into trans and trans into coolant.i know for sure that nissan extended the warranty on radiator for this problem.i am not sure the mileage and time limits.but if you fall within those limits they should also warrant the trans as this would be the source of failure(collateral damage).good luck and remember the squeaky wheel gets the grease!1-800-nissan1.ecm relay would not be a contributing factor.

SOURCE: Nissan Sentra 2001 - Overheating but no hot air

It could be just air in the system, or it could be the heater matrix just by your feet, fitted central dash, check to see if the two water pipes that go into the car from the engine compartment are hot if there is only one that is then thats your problem, but if they are both cold the problem is more to do with where the water is coming from, please let me know how you get on

Testimonial: "Great tips, pointed me in the right direction."

SOURCE: Hi, I have a 2001 nissan

hi. was just looking at your problem of (sentra) overheating and actually, i am a mechanic for nissan and have changed many head gaskets for this particular vehicle equipped with 1.8 liter motor and found that they are notorious for this problem of faulty head gasket's.Unless you did't properly bleed the system,which i doubt because you seem mechanically inclined since you already changed every other part of the system,i would't doubt that this is the problem.Anyway, by the time you read this, you have probably already found this out..Just thought i would let you know this info.Good luck!...by the way,if you haven't already changed you cam and crank sensors,do that too,before you get stuck and get the part's at the dealer!!!!-they are redesigned from the old one's!!just some advise to try to help you out!!! John from N.Y.

SOURCE: 2004 nissan altima running very hot 60,000

It may be temperature sensor on radiator. Dashboard gets info from it. If this sensor is not good, ac will stop and dashboard willl show some strange temperatures.