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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 11-11-2012, 08:25 PM   #1
midnight325NYC
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Join Date: May 2012
Location: New York
Posts: 32
My Ride: 02 325i
Replaced rad now leak

Hey guys so my radiator had a slow leak and I bought a new behr one from bmaparts.com after seeing on here that it's legit. So my Indy put it in and said there's a leak where the lower rad hose connects to the rad. He tried to use sealant and all that but couldn't stop the leak. Now some of you may remember my random extreme over heat from a few months ago that turned out to be my upper rad hose (which was replaced) there's no problem with the connection of the upper to the rad but the bottom Jose is an issue.

Now the question is I know BMW hoses have the o- rings inside the hose itself, could it be that the lower hose is old and failing thus needing replacing or do you think it may be the rad?
Thanks
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Old 11-11-2012, 08:55 PM   #2
TurnersInOz
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Join Date: Dec 2011
Location: Brisbane
Posts: 492
My Ride: 2004 325i
Could be, but also check the temp sensor that is on the lower hose. This is a common point of leakage if not replaced.
If you wind up replacing the hose, make sure to also get a new sensor.
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Old 11-11-2012, 10:38 PM   #3
Mctwist77
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Join Date: Apr 2010
Location: USA
Posts: 172
My Ride: '99' BMW 323i
Replace hose, doubt radiator is faulty. I have a thread about just replacing the O ring look on my profile under statistics and go to threads started you should see it. Sorry i would give you the link but I'm on my phone.

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Old 11-12-2012, 08:17 AM   #4
midnight325NYC
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Join Date: May 2012
Location: New York
Posts: 32
My Ride: 02 325i
Thanks guys and yeah I was thinking about the sensor too I think I'm gonna swap the hose and sensor and see if that does the trick, will be back later with results
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