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Thread: Restoring a 2001 750iL that sat for 3 years

  1. #101
    Join Date
    Feb 2014
    Location
    MA
    Posts
    179
    My Cars
    2000 750iL
    Took the car for a short spin, the electric fan is not running, even when blasting the A/C but the engine is not overheating.

    I also replaced both battery. Bough 2 big ones, but the top one doesn't fit. its doesnt go in, too long.

    Whats the right battery size for the top one?

    Here are the battery I got from Autozone: http://www.autozone.com/batteries-st...20339_910031_0

    BCI Cold Cranking Amps (CCA): 950
    Cranking Amps (CA): 1000

  2. #102
    Join Date
    Dec 2015
    Location
    Maryland
    Posts
    183
    My Cars
    2000 BMW 750


    Here is a battery chart of the batteries you can use for the lower battery. For the upper battery, it is smaller in size. I believe you can use a 48/H6 or a 94R/H7 battery.

  3. #103
    Join Date
    Jul 2016
    Location
    Chicago, Illinois
    Posts
    1,893
    My Cars
    2002 540i\6
    Once you get DUDMD's cat software, you'll be able to dump the small battery or just use it for extra juice. But yea, an smaller will have to do for the top one.
    Last edited by XAlt; 02-20-2017 at 08:30 PM.
    Quote Originally Posted by WBAD530i View Post
    M62 is an uncontrolled substance, and when abused can cause severe side effects. Do your drugs in moderation kids.

  4. #104
    Join Date
    Feb 2014
    Location
    MA
    Posts
    179
    My Cars
    2000 750iL
    I guess I will replace the top one with a 48H6...

  5. #105
    Join Date
    Feb 2014
    Location
    MA
    Posts
    179
    My Cars
    2000 750iL
    Auxiliary fan not turning on when A/C is turned on. Do I have to remove the front bumper in order to remove the fan?

  6. #106
    Join Date
    May 2010
    Location
    East Bay Area, CA
    Posts
    1,531
    My Cars
    01 Dinan 740iS, 97 318ti
    Quote Originally Posted by masu3701 View Post
    Auxiliary fan not turning on when A/C is turned on. Do I have to remove the front bumper in order to remove the fan?
    Yes, but removal and reinstall is very easy to do.
    '01 740i Sport MKIV, Quad Brake Lights, OEM Bi-Xenon retrofit, LED Angel Eyes, HID Fogs, LED License Plate Lights, Dinan 7 certification, BM53 radio, OEM Sirius, Aux Input, TCU Bluetooth, Intravee II, iPod, Strong Strut, Dinan bits including Struts, Springs, camber plates, Intake, MAF, CAI, and Throttle Body

    '97 318ti Alpine White; '97 318ti Boston Green; '96 318ti Alaska Blue; '08 X5 4.8i Titanium Silver
    '84 633csi Black (sold); '88 325iC Black (sold); '97 740iL Black(sold); '01 740iS Black(sold)

  7. #107
    Join Date
    Feb 2014
    Location
    MA
    Posts
    179
    My Cars
    2000 750iL
    Quote Originally Posted by 740iSport303 View Post
    Yes, but removal and reinstall is very easy to do.

    Ok. Is that fan the same as the one on 740s?

    Also is that fan suppose to come on when a/c turned on even in the winter? Mine doesnt turn at all, but engine not overheating.

  8. #108
    Join Date
    Dec 2015
    Location
    Maryland
    Posts
    183
    My Cars
    2000 BMW 750
    I believe the fan would be the same across both 740s and 750s.

    I would think that the fan would not be needed during winter. But I'm not sure. Lets wait for someone to chime in.

    On the bright side, the engine is not overheating now.

  9. #109
    Join Date
    Jul 2016
    Location
    Chicago, Illinois
    Posts
    1,893
    My Cars
    2002 540i\6
    Aux fan is only really needed on super hot days with the A.C. running, or when the fan clutch goes out.
    Quote Originally Posted by WBAD530i View Post
    M62 is an uncontrolled substance, and when abused can cause severe side effects. Do your drugs in moderation kids.

  10. #110
    Join Date
    Feb 2014
    Location
    MA
    Posts
    179
    My Cars
    2000 750iL
    Quote Originally Posted by XAlt View Post
    Aux fan is only really needed on super hot days with the A.C. running, or when the fan clutch goes out.
    Thats what I was thinking, but a friend of mine thinks that its should go on whenever the a/c is turned on which made me think that my fan is bad.

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