328 Replacement Alternator R&R versus rebuilding original Question | FerrariChat
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328 Replacement Alternator R&R versus rebuilding original Question

Discussion in '308/328' started by Jerry458, May 26, 2025 at 10:55 AM.

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  1. Jerry458

    Jerry458 Karting

    Nov 6, 2024
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    #1 Jerry458, May 26, 2025 at 10:55 AM
    So i need to remove the alternator to either rebuild or replace on the 328. My AC system is already removed but the replacement alternators I see vendors selling online do not have long enough screws to allow you to remount the rear cast aluminum cover where the cooling vent hose would go.

    also having the rear aluminum cover off the alternator makes R&R so much easier for servicing as the physical case is much shorter and I am leaning towards doing it this way and keeping it like that.

    I wanted to ask any if you guys who have replaced your original alternator if you installed yours without the rear cast aluminum cap or not. Almost all of these cars are missing that flex hose today and I do not think it really does much considering how we are sparingly using our cars these days.


    Photos below show an original versus the replacements most parts vendors are selling

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  2. smg2

    smg2 F1 World Champ
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    #2 smg2, May 26, 2025 at 11:58 AM
    The cover and hose are a Ferrari part, probably why it's not part of a replacement alternator.
    Ferrari added those bits for a reason, the alternator gets cooked under the manifold, the impeller fan should be pulling in fresh cold air from under chassis to feed the diode bridge and regulator and windings as it pulls thru.
    Question is, how much I suppose.. well Ferrari wouldn't go to the cost and expense of updating that part if it didn't work.

    So my long winded vote is to retain that feature.

    Early models used a stand off heat shield plate, kinda effective, better then nothing.
     
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  3. Iain

    Iain F1 Rookie

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    #3 Iain, May 26, 2025 at 12:03 PM
    The 328 alternator is just a standard Bosch unit internally so easy (and cheap) to service/recondition - just don't tell anyone its off a Ferrari! You just need someone who can refurb Bosch components.
     
  4. Rifledriver

    Rifledriver Three Time F1 World Champ

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    #4 Rifledriver, May 26, 2025 at 2:19 PM
    Manufacturers are not in the business of installing expensive hidden parts that are not needed.
    Leave it on.
    BTW you say most no longer have the hose. I work on them every day and have never seen one without the hose but then I dont work on junk cars.
    You dont suppose you could post your VIN for us?
     
  5. Rifledriver

    Rifledriver Three Time F1 World Champ

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    #5 Rifledriver, May 26, 2025 at 2:21 PM
    Making a good hamburger is easy too but I cannot seem to find a good one of those either.
     
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  6. 26street

    26street Formula Junior

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    #6 26street, May 26, 2025 at 4:27 PM
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  7. Imatk

    Imatk Formula Junior

    May 6, 2007
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    #7 Imatk, May 27, 2025 at 10:44 AM
    Would that cover and hose be something that could retrofit to a 308?

    Seems like it would be a worthwhile upgrade if so.
     
  8. smg2

    smg2 F1 World Champ
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    #8 smg2, May 27, 2025 at 11:40 AM
    I believe so, the hose is simply held with a larger clamp off the gear case for the other end, nothing fancy there. The trick would be getting that cover part, no idea on how difficult that is honestly.
     
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  9. Jeffinva

    Jeffinva Rookie

    Dec 3, 2012
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    #9 Jeffinva, May 27, 2025 at 12:42 PM
    FYI - for the hose, I used a 1 foot section of SCEET-7 hose from Aircraft Spruce. $17 shipped. As far as I know, the rear cover is stock on my ‘84 GTS QV.

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  10. Imatk

    Imatk Formula Junior

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    #10 Imatk, May 28, 2025 at 9:57 AM
    Doy you know the ID for the hose?
     
  11. Jeffinva

    Jeffinva Rookie

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    #11 Jeffinva, May 28, 2025 at 1:00 PM
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