water pump or theromstat?
#1
#3
#4
The same thing happened to me a couple of months ago. 06 Coupe 47k miles. A friend of mine is an Infiniti tech, I was overheated on the side of the road so I gave him a call. He had me feel the upper and lower rad hoses for a drastic temp difference. And there was. He told me to turn on the heater full blast and drive to the dealership, (which was only about three miles away). We replaced the thermostat, overheating issue solved. Hope this helps you.
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Urbanengineer (02-07-2015)
#5
If you start the car when it is cold, and then feel during the first 5 minutes (or so) whether the upper radiator hose gets too hot to hold or not (i.e. coolant flowing through radiator), you can tell if the thermostat is opening at all. Also, you can see and hear when the fans kick on or not after the coolant start flowing through the radiator. They won't come on right away; it should take a few minutes after coolant flows through the radiator.
Good luck and let us know what you find either way.
BTW, it is always a good idea to replace the radiator cap too. It plays such an integral part in the cooling system (by maintaining proper pressure), but it is often overlooked/neglected. They are a wear item and should be replaced periodically.
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