How to Add Coolant to a Mini Cooper S

Written by russell wood
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The cooling system in your Mini Cooper S is critical to proper operation because without it, your engine can overheat and potentially damage the engine internally as well as externally. The Cooper S has a tiny and cramped engine bay, so it may not be immediately apparent where the coolant tank is located--this is the hardest part of the job.

Skill level:

Things you need

  • Mini Cooper specific coolant
  • Distilled water
  • Empty and clean milk jug

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  1. 1

    Pop the bonnet on your Mini Cooper and locate the engine coolant tank in the centre of the engine bay, directly behind the engine intercooler. Look for a plastic, off-white coloured and slightly translucent tank with a black cap.

  2. 2

    Open the black cap by twisting it counterclockwise with your hand. Locate the raised measurements on the side of the tank that read "Full" or "Refill." (You're going to fill the coolant tank until the mixture reaches the "Full" mark.)

  3. 3

    Pour the Mini-specific coolant into the empty milk jug until it's about halfway full. Fill the rest of the jug up with distilled water to produce a 50-50 mix of coolant and distilled water, which is what the manufacturer recommends. Put the cap back on the jug and shake thoroughly to ensure it's mixed properly.

  4. 4

    Pour the contents of the milk jug into the coolant tank until it reaches the "Full" mark on the side.

  5. 5

    Reinstall the cap and close the bonnet.

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