Coolant reservoir

Tiny
WILLIAMS19
  • MEMBER
  • 2007 MINI COOPER
  • 80,000 MILES
Coolant is empty after a short journey. I fill it up and it empties on the ground underneath straight away. I have to fill it twice to see if the coolant stay at max level. I'll come back to it few hours later and there's no more liquid. Had a look round the coolant reservoir and can see the liquid has leaked onto pipes around it. But can't see where the actual leak is coming from. Underneath the car is all wet too.
Friday, May 24th, 2019 AT 9:54 AM

3 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This sounds like you could have a problem with the expansion coolant tank hose on the bottom of the coolant expansion tank. I have included instructions on the removal and installation of the coolant expansion tank as well as an exploded cooling system diagram in the diagrams down below. Please go through the guide and get back to us with what you find out.

Thanks,
Alex
2CarPros
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Friday, May 24th, 2019 AT 3:30 PM
Tiny
TJS123
  • MEMBER
  • 10 POSTS
I have kind of the same problem. I have a 2002 Mini Cooper. I fill my coolant expansion tank and after driving 35 miles I only have a half a tank left. I can fill my tank and leave it and the water does not go down. What could be wrong?
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Tuesday, May 18th, 2021 AT 9:37 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Do you notice coolant leaking on the ground? This guide can help:

https://www.2carpros.com/articles/car-is-leaking-coolant

and

https://www.2carpros.com/articles/coolant-leak-symptoms

Please run down these guides and report back.
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Thursday, May 20th, 2021 AT 7:32 PM

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