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  1. #1
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    May 2012
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    Post E90 Guru's, care to chime in? Cooling system question

    Hey all!

    Quick question, are E90 cooling systems similar to an E46? Specifically in the aspect that they are changed entirely every 80k miles or so?

    A friend of mine has an auto E90 328i with 69k SoCal miles on it. The coolant light has come on several times a week as of late, and they are adding distilled water. I took a quick look last night in the movie theater parking lot and it appears that the radiator is leaking at the bottom. I'll be doing the work for them, so should we go ahead and order all of the cooling system components?

  2. #2
    Join Date
    Feb 2013
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    Austin TX
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    My 2006 e90 330i has 89k miles. I live in TX, so probably the conditions compare to SoCal. The only coolant system repair I had done is: lower radiator hose at 83k miles. I would think 69k miles is a little early to do a complete cooling system refresh.

  3. #3
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    May 2012
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    Quote Originally Posted by fredo View Post
    My 2006 e90 330i has 89k miles. I live in TX, so probably the conditions compare to SoCal. The only coolant system repair I had done is: lower radiator hose at 83k miles. I would think 69k miles is a little early to do a complete cooling system refresh.
    I would have to agree. I'll pressure test the system and identify the leak for sure, and then replace the leaky part accordingly.

  4. #4
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    It's still the same plastic, I would maintain the 7yr/70k schedule

  5. #5
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    Quote Originally Posted by fredo View Post
    My 2006 e90 330i has 89k miles. I live in TX, so probably the conditions compare to SoCal. The only coolant system repair I had done is: lower radiator hose at 83k miles. I would think 69k miles is a little early to do a complete cooling system refresh.
    Yeah but it's over 8 years old. Age is a factor...
    Plus, if the car gets driven in any stop & go, that is harsher on the cooling system than say freeway driving. All depends on the type of driving you do.
    BP
    2005 330i ZHP / 6MT
    Imolarot / Naturbraun
    2003 330iT / 6MT
    Orientblau / Naturbraun




    It's not the car you drive, it's how you drive it.

  6. #6
    Join Date
    Mar 2011
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    Philadelphia
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    The electric water pumps tend to go around 75-100k IIRC, but the rest of the system appears to be fairly robust.

  7. #7
    Join Date
    Aug 2011
    Location
    The Windy City
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    9,155
    Autozone.com
    Our e91's cooling sys went at 26k this summer (car is an 07 though)... They're just as susceptible as e46s are. Thermostat and pump were the culprit. Tank looked fine.


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    Call me Seth
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    RETIRED: ‘15 F22 M235i | '08 E90 M3 DCT "GoinHAM3" | '04 E46 M3 6MT "WEGOHAM"
    '04 330i ZHP | '11 E82 135i | '08 E90 328xi | 07 E91 328xi SportWagon

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