Results 1 to 4 of 4

Thread: WTT: Alternator with 24MM nut for 1974 OEM Alternator

  1. 06-22-2018, 06:04 PM #1
    davemath
    davemath is offline
    Senior Member
    Join Date
    Mar 2016
    Posts
    115

    WTT: Alternator with 24MM nut for 1974 OEM Alternator

    I went to remove my alternator for a rebuild and thought that it was odd to have a 24 MM nut on it.

    When I picked it up from rebuilding, my shop said “this isn’t original to your ‘74 911.” After they rebuilt it of course.

    So I’m looking to learn what model 911 that this came out of, and looking to trade for the correct 1974 Alternator for the 1974 and perhaps swap fans too.

    Any clues to this part’s origination gang?

    1F4FF765-C65F-49BD-8C31-3B4813674F82.jpg
    A5CDE16C-B1D7-4248-B641-9FCFA0A90EF1.jpg
    8966E1F3-7AF4-46DC-A2BC-9267E2D88EE2.jpg
    Reply With Quote Reply With Quote
  2. 06-24-2018, 03:44 AM #2
    Frank Beck
    Frank Beck is offline
    Banned
    Join Date
    Nov 2004
    Location
    Scottsdale, AZ
    Posts
    9,752
    That's a contemporary replacement probably sold before Valeo discontinued the SEV-Marchal branding. The original alternator never came with internal voltage regulator. If you go back to original style SEV you'll need to wire in a regulator (no big deal).
    Just curious: Why do you want to "swap" fans?

    https://www.valeo.com/en/our-story/
    Reply With Quote Reply With Quote
  3. 06-25-2018, 09:00 AM #3
    davemath
    davemath is offline
    Senior Member
    Join Date
    Mar 2016
    Posts
    115
    Thank you. Well, I assumed that with the larger diameter shaft, for the 24MM nut, the fan hole would be larger than stock too.

    Seems like the 1980 911’s had this larger nut unit. Maybe I just put a 24MM wrench in the tool kit.

    D
    Reply With Quote Reply With Quote
  4. 06-26-2018, 03:34 AM #4
    Frank Beck
    Frank Beck is offline
    Banned
    Join Date
    Nov 2004
    Location
    Scottsdale, AZ
    Posts
    9,752
    All take the same fan.

    The larger shaft is directly related to the internal voltage regulator type alternators which were OE on later SC's.
    I'd keep what you have and buy a wrench.
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules


Message Board Disclaimer and Terms of Use
This is a public forum. Messages posted here can be viewed by the public. The Early 911S Registry is not responsible for messages posted in its online forums, and any message will express the views of the author and not the Early 911S Registry. Use of online forums shall constitute the agreement of the user not to post anything of religious or political content, false and defamatory, inaccurate, abusive, vulgar, hateful, harassing, obscene, profane, sexually oriented, threatening, invasive of a person's privacy, or otherwise to violate the law and the further agreement of the user to be solely responsible for and hold the Early 911S Registry harmless in the event of any claim based on their message. Any viewer who finds a message objectionable should contact us immediately by email. The Early 911S Registry has the ability to remove objectionable messages and we will make every effort to do so, within a reasonable time frame, if we determine that removal is necessary.