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The 2005 Nissan Pathfinder has issues with overheating, which are caused by a blocked radiator and a stuck thermostat. Various engine problems may arise, such as a spark plug coming loose, a loose gasket that needs to be tightened promptly, and oil leaks that require immediate attention. Engine overheating is a significant concern as it can lead to fires and even the vehicle exploding. Excessive oil consumption may necessitate more frequent oil changes than expected. It is recommended to change the coolant every 60,000 miles, replace the air filter every 15,000 to 30,000 miles, and change the spark plugs every 100,000 miles unless you have a copper spark plug, in which case it should be replaced every 30,000 miles.
While there are several reasons why your Nissan Pathfinder might be experiencing overheating issues, the top three common causes are a coolant leak (such as from the water pump, radiator, or hose), a malfunctioning radiator fan, or a faulty thermostat.