Low coolant. No leak?

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JARentDTOM

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So I took a 500 mile trip this week and topped to the line “Filled to Here” before I left. When I got back here’s what I had lost...somewhere. Both levels were when engine was cold. I have extended warranty, so I’ll be taking it in.
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Rberkel

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Check the back of the engine. The cross-over pipe on the back could be where the leak is.
 

colorover

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Had several coolant leaks which ultimately resulted in replacing most of the system, including cross over pipe, water pump, etc even though I never had any noticeable leaks / drips. Had another small leak again this time from the water pump gasket. Hopefully fixes it for a while.




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NASdiesel

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I'm going with pin hole leak on the rad that isn't visible. I had all the same symptoms, pressure test with no issues, changed water pump and crossover pump. I highly recommend the UV dye. It is the only way I located mine.
 

Quijote

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That's a good idea. I'll add the dye. Any recommendations?

I checked the coolant level again recently. I can't tell that it has lost any coolant in the last two weeks. But admittedly, I've not driven it much.
 
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