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2Addicts | BMW 2-Series forum BMW 2 Series (F22) Forum BMW 2 Series Coupe and Cabriolet (F22/F23) General Forum Coolant Heater Return Line Burst

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      04-21-2018, 06:52 AM   #1
Smartbooby1
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Coolant Heater Return Line Burst

Hello,

Recently the heater return line on my 2007 e90 328xi bursted and poured 3/4 of my coolant onto the floor. Since home was 5 mins away, I patched it up with duct tape and zip ties and refilled with coolant I had in my car to bring it home safely... it bursted again once I parked in my lot.

I got the replacement part and am going to diy (P/N: 17127525870). Doesn’t look like a common problem to me as no one else documented the issue online. The heater return line connects from the bottom of the expansion tank > thermostat > heater core > transmission line. It is completely one line with a mix of rubber hoses attached to a plastic line.

The area that bursted was along the plastic line.. so my question is, was it my fault that this happened? Could’ve I have put unnecessary pressure into the coolant system? Or was it just bad luck on my part?
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      04-21-2018, 08:47 AM   #2
RoundelM3
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You might want to ask your question on the E9x 3-series forum, as your engine is not used in the F2x 2-series cars (or the F3x 3-series either). That said, your car is 11 years old, so it's likely just part failure due to age.
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      04-22-2018, 01:02 PM   #3
Questofthetune
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Had similar rigid line in my 235 pop. I was just cleaning the engine lol. I ran over to Bmw and paid the 40$ and was good to go 10 moms later
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