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      08-07-2023, 05:45 AM   #2
clueby4
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Drives: 02/2010 BMW e82 n54 135i
Join Date: May 2023
Location: Tasmania, Australia

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maybe try the coolant bleed procedure to see where it’s leaking?

Make sure your coolant reservoir is topped up.
Press the start button twice without feet on any pedals so engine is off but ignition is on.
Turn a/c fan onto lowest setting but temp to max.
Press gas pedal till you hear the water pump start (somewhere between 10 and 20 seconds)

Hopefully this will help you locate the leak? Advisable to do it when the car is cold.

For better visibility i’d take the air intake off the airbox. 4 screws holding it in place at the front of the engine bay (marked in red) and two clips holding it onto the the airbox (marked in green)

edit: my money is on the hose connecting underneath the top radiator hose marked red in the second pic attached
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Last edited by clueby4; 08-07-2023 at 05:59 AM..
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