New genuine expansion tank defective.

darkfires102 · 12-09-2023, 10:03 AM

Bought a new genuine expansion tank and cap off of FCP and installed it today. Found that the cap keeps cross threading on the new ET and not locking correctly with the arrow! New cap + old expansion tank works fine. Looks like a quality issue with these ETs. Thoughts? E-mailed FCP but waiting to hear back from them.

anjuna · 12-12-2023, 04:33 PM

to be clear - when you say "cross threading" you do mean that it doesn't thread on right and cannot be fully tightened to make a seal?

If that's not what you mean and you're just concerned about the arrows lining up, that doesn't really matter. Mine has never been aligned, like ever. zero issues.

12-09-2023, 10:03 AM	#1
darkfires102 New Member 10 Rep 26 Posts Drives: '11 335xi, '09 335xi Join Date: Oct 2021 Location: Colorado iTrader: (0)	New genuine expansion tank defective. Bought a new genuine expansion tank and cap off of FCP and installed it today. Found that the cap keeps cross threading on the new ET and not locking correctly with the arrow! New cap + old expansion tank works fine. Looks like a quality issue with these ETs. Thoughts? E-mailed FCP but waiting to hear back from them. Attached Images __________________ 2011 335xi N55 6AT FBO + 2009 335xi N54 6AT BONE STOCK
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12-12-2023, 04:33 PM	#2
anjuna First Lieutenant 309 Rep 394 Posts Drives: f25 Join Date: Feb 2017 Location: houston iTrader: (0)	to be clear - when you say "cross threading" you do mean that it doesn't thread on right and cannot be fully tightened to make a seal? If that's not what you mean and you're just concerned about the arrows lining up, that doesn't really matter. Mine has never been aligned, like ever. zero issues.
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