Question about 1996 Nissan Sentra

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The car is running hot..we went to change the thermostat, but discovered it didn't have one in the line. What could be causing it to run hot??

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If the fans and other engine cooling systems are working fine then most probably the problem is due to an advance timing of the vehicle.
Have your engine timing checked and properly adjusted. An advance timing will cause the engine to run hotter than normal. Also, an old engine oil will cause the engine to run hotter because it looses most of its ability to suppress friction. Clogs in the water system and oil delivery system will also cause the engine to run hotter. A malfunctioning water pump will also cause the engine to run hotter and almost all the time, cause it to certainly overheat. Another is the radiator, if it usually loses water/coolant, then you have a problem right there.

Posted on Jan 16, 2011

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  • Nissan Master
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Check electric fans to see if they are coming on. and also make sure there is enough anti freeze in system. if fans do not work proper, check the fan relay if relay is ok. then the problem is either a bad wire or the fans itself are bad. to check fans-- take wire connector off of fans, then run a wire from positive on battery to positive on fan, ground other wire if need be. if fans do not run then thats your problem.

Posted on Aug 20, 2010

  • carl Aug 20, 2010

    also make sure coolant is at a proper level.

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Over heating and blowing cold air from heater


Possibly leaking head gasket. Easiest way to check would be to fill radiator full, start engine and watch coolant level in the radiator cap opening. The top radiator hose will become hot when thermostat begins to allow coolant flow through the radiator. You may have to top off the coolant. Still with the radiator cap off watch for water belching out of the radiator neck. If coolant does belch out of the radiator cap neck, refill with water. If it belches out coolant again it would be combustion gassed forcing the coolant out of the radiator.


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