Could be several reasons, low on coolant (leak in the system), stuck thermostat, faulty cooling fan(s), bad head gasket, cracked head, faulty fan clutch, faulty water pump, missing fan shroud,
To keep the car engine from over heating
your car is over heating
If it is not actually over heating, then if the smell is outside the car, look for coolant leaks around the head and the thermostat cover. Inside the car could be a leaking heater coil.
If your car is over heating you may want to check your thermostat and replace it may solve your over heating problems
that's because car was on too long. that's because car was on too long.
Can result in freezing in the winter and over-heating in the summer.
If your Pathfinder is over heating then you may have an issue with the coolant. You can try adding more coolant to ensure that your car is no longer over heating. You can also double check to make sure your blower is actually cooling your engine.
Usually heating is done by passing air over the hot engine so no extra fuel (gas/petrol) is used.
it can be many stuff but in your place i would check first the coolant level and the thermostat
Over-obvious answer? Your radiator, or one of your radiator hoses, leaks - badly.
for help ; open the third & fourth link on : Www.buy-sell-car.info
Intake or inlet manifold has nothing to do with the heating of the car. Newaz.