I babble on a bit in this video but to break it down-
2014 Armada came from another shop, overheating at idle only. Sometimes would take 45min of sitting still to start overheating.
Check coolant temp on scanner to confirm condition. Replaced aftermarket thermostat with oem. Checked water pump impeller for good shape and function.
The heat worked both front and rear just fine. Replaced fan clutch due to it being a little weak. Checked proper direction of electric fan. All of this with mostly no change. I even flow checked the radiator per Nissan service manual, which is 5 gallons in one minute through the radiator. It passed, barely, but it passed.
I replaced the radiator anyways and it fixed the vehicle. After taking the tank off and seeing the poor flow it’s obvious that was the issue.
Your vehicle could have a different issue and I’m just posting my find on this one. Could help someone
Some things to note, you could slightly rev the vehicle and it would cool down rapidly. You could drive it all day and not overheat. I vacuum fill coolant with the vehicle on a steep incline, no chance of air pockets.
Негізгі бет Nissan Armada / Titan overheats at idle (fixed)
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