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Old 02-19-2013, 07:44 PM
Supercourse Supercourse is offline
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Location: British Columbia, Canada
 
Join Date: Feb 2008
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Mein Auto: 2004 X3 2.5i
Quote:
Originally Posted by avoisin View Post

Anyone have ideas??
Have you checked the o-rings inside those 2 ports?

I don't think removal of the tank to replace the A/T thermostat should be enough to flatten them out, but you never know.

It's usually tanks and thermostats get replaced one time together, so the o-rings are possibly not designed to be re-used.

Maybe carefully extract the problematic one, soak it in some coolant mix to make it more pliable, and reseat it?

Other than that, maybe there is a hairline fracture at the bottom of that one port.
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