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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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Old Today, 01:21 PM
Ltcherry325i Ltcherry325i is offline
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Location: Durant,MS
 
Join Date: Mar 2015
Posts: 16
Mein Auto: 2003 325i
Leak on top of expansion tank??

I notice coolant seemingly spraying up at the upper radiator hose and I'm wondering if anybody knows what could be the culprit. The coolant leaks out as soon as I put it in and cut the heat on. Before it got as bad,there was a constant small buildup of coolant on top of the expansion tank.

Could it be the tank or the hose fitting?? I replaced the hose but the problem got worse. The fitting seems a bit weird to me as everything kinda moves and doesn't seem to be secure. Any help would be great!
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