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Thread: Alternator Problems?

  1. #1

    Alternator Problems?

    Ok, first electrical issue:

    Now that my MFI is behaving better, I noticed another problem last week. The RED alternator light started flickering for a few days, and then stayed on permanently. On Friday, my batteries died.

    I had a new VR put in about 4 mos ago by my 'reputable' mechanic because he said it wasn't charging properly. I've checked my belt and its plenty tight. I looked up alternators and they are $350-500!!! Any other ideas before I take it in? Also, anyone know where to find a decent price on a new Alternator?
    Chris Purpura @civilizedmisfit
    ___________
    Member #479
    Current Cars:
    1972 911T aka The "Civilized Misfit" Build
    See: https://www.excellence-mag.com/issue...vilized-misfit
    Miss February - EarlySRegistry 2023 Calendar
    1968 911S Ossi Blau/Beige Corduroy

    Past Cars:
    2019 911 Carrera GTS (sold, no regrets)
    73S - #1100 (restored and now somewhere in Europe)
    1997 993 Carrera 4S Black on Black (sold)

  2. #2

    Bosch Info.

    Check prices at this CA shop.


    Bosch Alternator and Starter Rebuilds
    SPU
    562-944-3221
    Jim
    Ed Barnett
    RGruppe #124
    Northern California Racing Club
    American Racing Club
    Member, Northwest Hillclimb Association

  3. #3
    Also:
    http://www.systemsc.com/

    Located in the L.A. area...
    Paul D. Early S Registry #8 - Cyclops Minister of West Coast Affairs
    "Now, to put a water-cooled engine in the rear and to have the radiator in the front, that's not very intelligent." -Ferry Porsche (PANO, Oct. 1973)

  4. #4
    THanks for the sources guys.

    Is this a do it yourself thing? Also, 55amp for a '73, correct? Whats the diff between Bosche and Marchal?
    Chris Purpura @civilizedmisfit
    ___________
    Member #479
    Current Cars:
    1972 911T aka The "Civilized Misfit" Build
    See: https://www.excellence-mag.com/issue...vilized-misfit
    Miss February - EarlySRegistry 2023 Calendar
    1968 911S Ossi Blau/Beige Corduroy

    Past Cars:
    2019 911 Carrera GTS (sold, no regrets)
    73S - #1100 (restored and now somewhere in Europe)
    1997 993 Carrera 4S Black on Black (sold)

  5. #5

    Bosch Info.

    Chris,
    I've always let the pros rebuild this stuff...I like the warrantee and the price is reasonable when you figure all the tools and inventory they must keep.

    I don't know the diffrence between Marchal and Bosch...I've always thought Bosch was a premium brand (it ought to be for the prices they charge ) but it may well be that Marchal is just as good???
    Ed Barnett
    RGruppe #124
    Northern California Racing Club
    American Racing Club
    Member, Northwest Hillclimb Association

  6. #6
    Ed,

    Thanks. I wasn't planning on rebuilding it, but rather installing it myself (can I do 'that' myself?).

    Tweeks catalogue says that both Marchal and Bosch were used in 70-73 cars. Apparently the threads are different??? Just looking for some bboard knowledge before I dive in with the 'pros'.
    Chris Purpura @civilizedmisfit
    ___________
    Member #479
    Current Cars:
    1972 911T aka The "Civilized Misfit" Build
    See: https://www.excellence-mag.com/issue...vilized-misfit
    Miss February - EarlySRegistry 2023 Calendar
    1968 911S Ossi Blau/Beige Corduroy

    Past Cars:
    2019 911 Carrera GTS (sold, no regrets)
    73S - #1100 (restored and now somewhere in Europe)
    1997 993 Carrera 4S Black on Black (sold)

  7. #7

    Alternator Questions

    Howdy Chris,
    Since you are a west coast person, as am I (Chico) I'll share with you that I have no confidence in anything that Tweeks has to say or sell. Pelican has most of my answers; Wayne and the gang usually can tell you what's what.

    I don't know your DIY skill level...it's very simple, no special tricks. Take the ALt. out and have a local rebuilder check it out and tell you which kind it is. Then, if its Bosch call the folks I mentioned in a previous post...if not, you'll have to do some more research as I don't have any experience with anything but Bosch.
    Ed Barnett
    RGruppe #124
    Northern California Racing Club
    American Racing Club
    Member, Northwest Hillclimb Association

  8. #8
    Ed,

    Thanks. Chico is a great town. Some good roads back behind there as I recall from my college days.

    I was looking through Wayne's book, looks like 4 hours and two toolguys (skill level) to replace the alternator. I might just get brave enough. I'll at least do some of the troubleshooting before I go further.

    Now that I"ve played with the MFI (with help) I"m feeling brave. Famous last words I'm sure.
    Chris Purpura @civilizedmisfit
    ___________
    Member #479
    Current Cars:
    1972 911T aka The "Civilized Misfit" Build
    See: https://www.excellence-mag.com/issue...vilized-misfit
    Miss February - EarlySRegistry 2023 Calendar
    1968 911S Ossi Blau/Beige Corduroy

    Past Cars:
    2019 911 Carrera GTS (sold, no regrets)
    73S - #1100 (restored and now somewhere in Europe)
    1997 993 Carrera 4S Black on Black (sold)

  9. #9
    Senior Member WHCJr72S's Avatar
    Join Date
    Oct 2002
    Location
    Bay Area
    Posts
    210

    Thumbs up

    Chris:
    Removing and replacing the alternator is not very hard. I did it about 15 years ago. Follow Wayne's book and take your time. You will probably need a tool to remove the outer fan pulley half to remove the fan belt. Remove the belt as the first step. Call if you need help.
    Bill Cilker, Jr.
    Gold 72 911S
    31 Ford Model A
    PCA, Early S Registry (#98) & RGruppe (#272)
    Rotarian

  10. #10
    Thanks again Bill. And if I'm stuck I'll call you. I'm gone for the next 2 weeks, so it probably won't be till end of the month.
    Chris Purpura @civilizedmisfit
    ___________
    Member #479
    Current Cars:
    1972 911T aka The "Civilized Misfit" Build
    See: https://www.excellence-mag.com/issue...vilized-misfit
    Miss February - EarlySRegistry 2023 Calendar
    1968 911S Ossi Blau/Beige Corduroy

    Past Cars:
    2019 911 Carrera GTS (sold, no regrets)
    73S - #1100 (restored and now somewhere in Europe)
    1997 993 Carrera 4S Black on Black (sold)

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