Hose connected to coolant expansion tank issue

WRichieX · 11-24-2021, 05:27 PM

Hey guys, I was having some leaks from the expansion tank seams so I replaced the tank. However, now I'm having coolant leak from the top hose connection. It's definitely in there completely with the quick connect, so my question is, is there supposed to be some sort of rubber gasket or something inside the connection part of the hose? Logic says there should be but there isn't one. Maybe fell out? Or is the expansion tank defective? TIA

feuer · 11-25-2021, 03:43 PM

O-ring. Replace it

WRichieX · 11-25-2021, 06:11 PM

Quote:

Originally Posted by feuer

O-ring. Replace it

Inside the hose? There's no o ring or gasket type thing anywhere to be found

TheMidnightNarwhal · 11-26-2021, 12:59 PM

Yeah should be a O ring inside the quick connect thing. Of course you can't buy it separately from the BMW diagrams, comes with the hose.

Actually, I went and took a look at mine and couldn't find the O ring at first. It's not really an O ring but seems to be a rubber grayish ring deep inside the connector.

feuer · 11-27-2021, 12:23 PM

Quote:

Originally Posted by WRichieX

Inside the hose? There's no o ring or gasket type thing anywhere to be found

You didn’t look good enough. Why and how you expect plastic on plastic to seal pressurized hot coolant?

11-24-2021, 05:27 PM	#1
WRichieX Major 79 Rep 1,076 Posts Drives: 07 335i e93 6MT Join Date: May 2013 Location: Chicago iTrader: (0) Garage List 2007 BMW 335i E93 [0.00]	Hose connected to coolant expansion tank issue Hey guys, I was having some leaks from the expansion tank seams so I replaced the tank. However, now I'm having coolant leak from the top hose connection. It's definitely in there completely with the quick connect, so my question is, is there supposed to be some sort of rubber gasket or something inside the connection part of the hose? Logic says there should be but there isn't one. Maybe fell out? Or is the expansion tank defective? TIA __________________ 07 BMW 335i E93 6MT (Praying neighborhood doesn't get flooded...again) 04 Infiniti G35 Coupe 6MT (Flooded) 08 Audi TT 2.0T DSG (Flooded) 03 Subaru WRX 5MT (Flooded)
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11-25-2021, 03:43 PM	#2
feuer Major General 4276 Rep 9,206 Posts Drives: wife crazy! Join Date: Apr 2015 Location: Chicago, IL iTrader: (5)	O-ring. Replace it
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11-26-2021, 12:59 PM	#4
TheMidnightNarwhal Major General 2657 Rep 6,290 Posts Drives: 11' 335is DCT Join Date: Jun 2015 Location: Gatineau, Quebec iTrader: (0)	Yeah should be a O ring inside the quick connect thing. Of course you can't buy it separately from the BMW diagrams, comes with the hose. Actually, I went and took a look at mine and couldn't find the O ring at first. It's not really an O ring but seems to be a rubber grayish ring deep inside the connector.
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