Overheating

THENIGHTFURY

MEMBER
1999 DODGE DURANGO
5.9L
V8
2WD
AUTOMATIC
244,124 MILES

SUV has been overheating, I've changed the thermostat the piece on top of it and the top radiator hose. But it's still overheating and now it's to the point of the check gauge light coming on. What could the problem?

I also have to drive fifty miles one way to work every day.

5 Replies

SQM

MECHANIC
6,383 POSTS

Hello,

The engine can overheat due to a number of reasons.
You have already replaced the thermostat which is fairly common. However, it can also overheat due to a bad water pump, faulty radiator, restriction in the cooling system, bad fan clutch, it can also overheat due to contaminated coolant or having low coolant.

Take a look at this helpful guide:

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Let me know what you find or if you have any questions.
Thank you.

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Monday, June 27th, 2022 AT 2:32 PM

THENIGHTFURY

MEMBER
3 POSTS

The fan seems to be working and as far as I can tell the water pump is okay. Thank you for the ideas, I'll look into it, and see what I can do.

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Monday, June 27th, 2022 AT 3:11 PM

SQM

MECHANIC
6,383 POSTS

Let me know what you come across.
Don't hesitate to ask any questions.

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Monday, June 27th, 2022 AT 4:07 PM

THENIGHTFURY

MEMBER
3 POSTS

Thank you so very much, when I got home we did some tests and I'd does have water circulation the fan is working, the thermostat is working, we looked at the radiator cap and saw some dry rot what are the odds that it's the radiator cap causing it to continually overheat?

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Monday, June 27th, 2022 AT 8:25 PM

SQM

MECHANIC
6,383 POSTS

If the cap cannot maintain the pressure it is rated, it can lead to overheating of the engine. It can also leak out coolant.

https://www.2carpros.com/articles/radiator-pressure-test