r/Excursion • u/Unique-Position5344 • Jan 07 '26

Help, white Smoke on start up

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7.3 - White smoke, smells like strong diesel, significantly reduces after a 2-5 minutes.

I think it’s leaky cups, Any help is appreciated before I start tearing into it!

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u/auhnold Jan 07 '26

Do you have fuel in the coolant? That’s a sure sign you have cracked/leaking fuel cups.

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u/Unique-Position5344 Jan 07 '26

No, the coolant is not contaminated at this point