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Discussion Starter · #1 ·
Hey, all.

I was sitting at a light and the temperature needle was at it's usual hash mark before the 220 reading. Out of no where the needle jumped to 280 faster than I could blink and I received the engine overheating chime. Then in the same speed it went back to the hash mark before the 220 reading. Then it went back to 280, and in small fast incrents went back down. It repeated this cycle until I began driving and stayed at normal operating temperature.

The coolant system has not had any maintenance performed on it recently. The fans kick on. Coolant is at the appropriate levels. For that reason I don't believe air is trapped or there is an issue with the fan relay or fans.

Any thoughts? I wanted to drive and replicate it to see if the Aerogauge reads differently, but if I recall it's the same signal.

Bad sensor? Bad ground? Are there any purge lines that could be clogged?

Car has 60K miles and is a 2013 MY.

Appreciate any insight.i was going on a road trip tomorrow but that may not happen now
 

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Discussion Starter · #3 ·
Stat, head gasket, sensor…
I appreciate it.

Did some more digging and checked it once the engine was cold. Coolant was quite low. Got under the car and there's a small leak somewhere. I found a small area with some red/orange sticky, dirty dexcool on the subframe where it seems to be collecting. It's not fresh so it can't be too egregious of a leak.

Going to take it to the dealer to see if the leak can be isolated.
 

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If the leak is on the drivers side check the oil cooler on the block. The water pump has a small feed hose to it and something could be leaking from that area. Unlikely but easy to check.


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i always look at the digital readout for the temp if u can as that will give some away, temp always should go up gradually so if u see it skipping numbers or going up 3-4 at a time its prob sensor on way out, or only other cause to that is if its in a steam pocket caused but air in the system
 

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Discussion Starter · #9 ·
If the leak is on the drivers side check the oil cooler on the block. The water pump has a small feed hose to it and something could be leaking from that area. Unlikely but easy to check.


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Quick update.

You were the closest. It was the water pump itself. Not sure where it was leaking. I'll get more details when I pick it up.
 
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