Coolant connection fitting question

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Coolant connection fitting question

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01-12-2025, 04:54 PM

RenaissanceMan RenaissanceMan is offline

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Coolant connection fitting question

I have a 2005 3.0i and have a leak where the bottom of the expansion tank meets this connection fitting (see attached pic, part #3).

I replaced the expansion tank last year and it included the oring that 'snapped' onto the fitting, so I'm not really sure why it started leaking here. It feels like it is no longer snapped into place and can be easily moved in and out of the bottom of the tank opening and won't snap back into a locked position.

Do you think this fitting can be replaced without removing the expansion tank?

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'05 X5 3.0
'06 325i
'90 E30/S52

Last edited by RenaissanceMan; 01-12-2025 at 06:22 PM.

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