The thermostat may become stuck closed, causing an overheating condition. Replacement of the thermostat will be required to correct this concern.Google+
Car Problem Reports
Nissan Altima Overheating Due to Stuck Closed Thermostat
Nissan Altima Problem
Engines Affected: 2.5L 4 Cylinder, 3.5L V6
Average Mileage: 80,531 mi (30,000 mi - 110,000 mi)
Visitor, 2007 Nissan Altima, 2.5L 4 Cylinder, 75,576 mi
I started to smell coolant when I would get out of my car, it never did over heat. So I took a flashlite and pointed it into the radiator resivor to light it up and it was almost empty. Dropped it off at the dealer and they called me saying my thermostat is stuck closed and I have a very small leak on the top radiator hose. Went ahead and changed the bottom radiator hose also.
Visitor, 2003 Nissan Altima, 2.5L 4 Cylinder, 110,000 mi
Have a water leak someplace the auto ran hot. check engine light came on. The fan works good but water circulation in radiator with cap off is an off and on process.