R56 :: Hatch Talk (2007+) MINI Cooper and Cooper S (R56) hatchback discussion.
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Coolant leaking from expansion tank cap? Dark green coolant.

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Old Jul 20, 2019 | 11:46 AM
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Mad Dog Tannen's Avatar
Mad Dog Tannen
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1st Gear
Joined: Jul 2019
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From: Northern California
Coolant leaking from expansion tank cap? Dark green coolant.

I have a coolant leak and I am pretty sure it’s from the expansion tank cap.

Is there a little hole hole in the middle of the cap where coolant comes out?

I have filled the coolant a couple of times. No overheating.

Is it time to replace the cap?

The coolant is very dark colored, is this normal?


 

Last edited by Mad Dog Tannen; Jul 20, 2019 at 01:07 PM.
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