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-   -   Xterra 2001 Overheating (https://x.nissanhelp.com/forums/xterra/31589-xterra-2001-overheating.html)

nestorrs4772 07-26-2019 09:23 AM

Xterra 2001 Overheating
 
Hi, I have a Nissan Xterra 2001 and it overheats ONLY during a HOT and sunny day. On grey days or night it does NOT overheat. The radiator water is OK, the engine oil is ok. I replaced the fan. The thermostat seems ok after a test. Any ideas?

smj999smj 07-28-2019 08:53 AM

If it overheats when idling or at slow speeds, it is likely an airflow issue. This is often caused by a bad fan clutch, debris (like leaves, paper) in front of the A/C condenser or between the A/C condenser and radiator cores, bent cooling fins on the A/C condenser or radiator cores, cores fins clogged with dirt and sand, etc., or, if equipped, an auxiliary electric fan that is not working. If it is only overheating while driving at highway speeds, then you should still look at the condition of the core fins, but you may also have an issue with a restrictive radiator, bad thermostat or a possible bad head gasket.


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