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2001 Pathfinder Overheating Forums > > 2001 Pathfinder Overheating 2001 Pathfinder Overheating
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Old 03-17-2019, 08:12 AM
romeo4delta romeo4delta is offline
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2001 Pathfinder
Join Date: Mar 2019
Posts: 1
Unhappy 2001 Pathfinder Overheating

I have a 2001 Pathfinder that is overheating. I have replaced the radiator, radiator cap, and thermostat. I have made sure that all air is out of the system by pulling a vacuum. Vehicle is still overheating. Initially blowing warm air and as it heats up, blows cold air.

Question, would replacing the water control valve (2nd thermostat) possibly remedy my overheating issue? Just about out of options......
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Old 03-23-2019, 12:06 AM
Howard Bell Howard Bell is offline
2011 Versa
2017 Altima SE-R
Join Date: May 2018
Posts: 43

Make 100% sure the fans are on when it is overheating..........most have at least two speeds, need to be on high too.

Water pump could be bad...........
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Old 03-28-2019, 12:47 PM
smj999smj's Avatar
smj999smj smj999smj is offline
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2006 Pathfinder
2003 Frontier King Cab
2003 Frontier KC SVE 4x4
Join Date: Jun 2012
Location: Prospect, VA
Posts: 1,849

I always replace both thermostats as a set. If it overheats while driving on a highway or freeway, that's usually indicative that it is not a cooling fan (or fans) issue as the air being forced through the cores at those speeds are enough to provide sufficient airflow through the radiator and condenser cores. I have doubts about it being a water pump issue, as they rarely fail on VQ engines and when they do, it's usually not an overheating issue that it creates because of an impeller issue, but a coolant leak issue or noise issue due to a failed bearing. The possibility exists that there is a bad head gasket when all other possibilities have been addressed.
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