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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 06-04-2015, 01:49 AM   #1
Vtgts300kw
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Join Date: Jun 2015
Location: Auckland
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My Ride: 88 & 03 325i Touring
2003 325i Upper Radiator Hose Fitment Issue

Hi Guys,

I replaced my ET today and I just can't get the upper radiator hose to seat properly. The engine and radiator ends seem to be connected and clipped properly, but the small return hole back into the ET doesn't get close to locking in place, it's a good 5mm out from the clip lining up with the slots on the ET.

Any ideas? Even though the radiator end seems well and truly secure, could it somehow need to be pushed in further?

It's incredibly frustrating.


Cheers,

Kurt
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Old 06-04-2015, 09:11 AM   #2
Gus-CO
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I had a defective BEHR expansion tank installed on my car. The small pipe connection was too big and did not fit the o-ring connection on the hose. Try using calipers and measuring both the male ET and the female hose. You might have the same problem. I tried fixing it myself but ended up ruining the tank - I didn't have warranty since this tank was replaced a year ago by an independent shop that let it not well sealed and used stop-a-leak on the system.. Awesome, huh? The new one, also BEHR came in perfect.
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Old 06-04-2015, 02:51 PM   #3
Vtgts300kw
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Quote:
Originally Posted by Gus-CO View Post
I had a defective BEHR expansion tank installed on my car. The small pipe connection was too big and did not fit the o-ring connection on the hose. Try using calipers and measuring both the male ET and the female hose. You might have the same problem. I tried fixing it myself but ended up ruining the tank - I didn't have warranty since this tank was replaced a year ago by an independent shop that let it not well sealed and used stop-a-leak on the system.. Awesome, huh? The new one, also BEHR came in perfect.
Edit.

Last edited by Vtgts300kw; 06-04-2015 at 02:59 PM.
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Old 06-04-2015, 02:58 PM   #4
Gus-CO
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Is the ET OEM? That's weird because the quality control should be better. However, I think it is a BEHR anyway.

In my case the neck on the ET was too thick to get through the o-ring in the hose. I tried sanding it and then it connected, but of course I wasn't able to sand a perfect round shape so it'd leak...
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Old 06-04-2015, 04:03 PM   #5
Vtgts300kw
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Quote:
Originally Posted by Gus-CO View Post
Is the ET OEM? That's weird because the quality control should be better. However, I think it is a BEHR anyway.

In my case the neck on the ET was too thick to get through the o-ring in the hose. I tried sanding it and then it connected, but of course I wasn't able to sand a perfect round shape so it'd leak...
I got it on. Turns out what I thought was plastic inside the neck of the radiator hose ( after the o-ring ), was actually deposits. Got rid of what I could and it slid in like a, well, a slidey thing.
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Old 06-04-2015, 04:05 PM   #6
Gus-CO
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cool man! happy things worked out alright!
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Old 06-04-2015, 04:17 PM   #7
Vtgts300kw
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Originally Posted by Gus-CO View Post
cool man! happy things worked out alright!
You and me both man. I was ready to set my car on fire.

Thanks for your input.
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Old 06-04-2015, 05:07 PM   #8
Gus-CO
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No problem man!

I felt the same way, and then put the car together just to find a blown head gasket. Not fun. Hope yours didn't overheat.

Last edited by Gus-CO; 06-04-2015 at 05:28 PM.
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