Are coolant hose o-rings replaceable?

IM Buddy8 · 04-02-2023, 08:35 PM

Hello, I’m adding a ess supercharger but in the process I noticed the overflow hose from the bottom of the coolant reservoir is slightly weeping where it connects to the aluminum line in front of the water pump area.

Do I have to replace the entire hose or is there a part number for an o ring that’s serviceable at the connection to the aluminum line?

Thanks so much in advance!

Soden82 · 04-02-2023, 09:06 PM

I’m not sure if there is an O-ring in there, but I just replaced the belt for my Ess supercharger and was moving the coolant res and that hose around a good amount and noticed small drips of coolant coming out.

Curious what you find out.

DukeofAlexandria · 04-02-2023, 09:27 PM

The heater return pipes that go INTO the block have o-rings, I’ve replaced mine before.

The heater return hose does have an o-ring, but I believe it’s part of the actual hose; like a pre inserted one into the hose on the inside.

Again, I don’t THINK it has one that can be bought and believe they intended for it to be either a multi use or to just replace the entire hose.

Someone else chime in though and double check my work.

-Duke

04-02-2023, 08:35 PM	#1
IM Buddy8 Private 3 Rep 50 Posts Drives: Jeep Srt Bmw M3 Join Date: Oct 2021 Location: RI iTrader: (0)	Are coolant hose o-rings replaceable? Hello, I’m adding a ess supercharger but in the process I noticed the overflow hose from the bottom of the coolant reservoir is slightly weeping where it connects to the aluminum line in front of the water pump area. Do I have to replace the entire hose or is there a part number for an o ring that’s serviceable at the connection to the aluminum line? Thanks so much in advance! Attached Images
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04-02-2023, 09:06 PM	#2
Soden82 Major 477 Rep 1,194 Posts Drives: 2011 BMW M3 Join Date: Jun 2017 Location: Boston iTrader: (1) Garage List 2011 BMW M3 [0.00]	I’m not sure if there is an O-ring in there, but I just replaced the belt for my Ess supercharger and was moving the coolant res and that hose around a good amount and noticed small drips of coolant coming out. Curious what you find out. __________________ 2009 BMW 335i 6MT big single (eventually) For now... MHD tuned VRSF Race IC DCI ATM exhaust
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04-02-2023, 09:27 PM	#3
DukeofAlexandria Lieutenant 633 Rep 510 Posts Drives: 2007 E85 Z4 / 2013 E93 M3 Join Date: Apr 2018 Location: Maryland iTrader: (1) Garage List 2013 BMW M3 E93 [0.00] 2007 BMW Z4 E85 [6.00]	The heater return pipes that go INTO the block have o-rings, I’ve replaced mine before. The heater return hose does have an o-ring, but I believe it’s part of the actual hose; like a pre inserted one into the hose on the inside. Again, I don’t THINK it has one that can be bought and believe they intended for it to be either a multi use or to just replace the entire hose. Someone else chime in though and double check my work. -Duke
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