'98 Eldorado Alternator Replacement

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  • 9 Post By bbuffalo
Cadillac Seville / Cadillac Eldorado Forum Discussion, '98 Eldorado Alternator Replacement in Past Cadillac Vehicle Discussion; I just got done changing out an alternator on my '98 Eldorado today, and thought I would do a post ...
  1. #1
    bbuffalo is offline Cadillac Owners Member
    Automobile(s): Eldorado and Deville
    Join Date
    Jul 2012

    '98 Eldorado Alternator Replacement

    I just got done changing out an alternator on my '98 Eldorado today, and thought I would do a post to save someone else doing the same job some precious time. I had looked at some different posts on this forum for the alternator replacement prior to starting the job, and some stated the radiator had to be removed....not true. That is only true if you fail to discover there is a small "access cover" bolted to the bottom of the radiator support directly underneath the alternator. Remove the four bolts from the access cover, and you simply turn the alternator pulley side down, and drop it down through the access hole.

    To make it much easier to get to one of the back bolts of the alternator, remove the passenger side cooling fan.
    It only takes a few minutes to remove it, and it will save you a whole lot of time making it easier to get to the alternator. This also helps in the installation process, when you are holding the alternator with one hand while trying to start the bolts with the other hand.

    Remove the battery, and it makes getting to the front bolts of the alternator much easier also. So, it isn't anywhere near as scary as it looks at a first glance. It does take some dexterity to remove and reinstall the alternator, but I am a senior citizen, so if I can do it most anyone else can do it.

    I hope this is of help to someone, I didn't state the obvious items to remove, such as a "cover" on top of the radiator, and a splash guard (or whatever it is) on the bottom of the radiator. Any procedure that states you have to remove something else, or relocate oil lines etc. is incorrect. Only the battery, passenger side cooling fan, and access cover have to be removed.

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  3. #2
    turbol15 is offline Cadillac Owners Enthusiast
    Automobile(s): 97 eldo,2011 cts-v
    Join Date
    May 2010
    New york

    Re: '98 Eldorado Alternator Replacement

    thank you

  4. #3
    tsgrpr97's Avatar
    tsgrpr97 is offline Cadillac Owners Fanatic
    Automobile(s): 74 Coupe DeVille, 99 DeVille D'Elegance (diamond white)
    Join Date
    Nov 2008
    Not every vehicle has that panel

  5. #4
    stoveguyy is offline Cadillac Owners Connoisseur
    Automobile(s): 03 STS
    Join Date
    Aug 2007
    mpls mn

    Re: '98 Eldorado Alternator Replacement

    what was your alt issue? any codes? no charge? does it work ok now?

  6. #5
    BklynCaddi94's Avatar
    BklynCaddi94 is offline Cadillac Owners Member
    Automobile(s): 94 Eldorado ETC
    Join Date
    Dec 2011

    Re: '98 Eldorado Alternator Replacement

    can this work on a 94 Eldorado as well. Mine is sitting in a secure parking lot and i wont have time for the removal of the radiator so any other advise you have will be useful thank you

  7. #6
    imdavidhamilton is offline Cadillac Owners Member
    Automobile(s): 1998 Eldorado ETC
    Join Date
    May 2013
    Folsom, CA

    Re: '98 Eldorado Alternator Replacement

    @bbuffalo, Your post was 3+ years ago but it sure save me a lot of heartache this past week. Your excellent directions helped be change out my alternator on my 98 Eldorado ETC. My car had the access panel, and it was TIGHT get the alternator out and in through it, but it work. Thanks again.

  8. #7
    eseybold is offline Cadillac Owners Member
    Automobile(s): 1998 El Dorado
    Join Date
    Mar 2015

    Re: '98 Eldorado Alternator Replacement

    was worried about getting the alternator out and new one in - a few videos show the radiator coming out - not needed. I have the access panel and now will tackle the job this weekend. THANKS !!!!!

  9. #8
    460racer is offline Cadillac Owners Member
    Automobile(s): 1984 Convertible, 1985 Convertible, 1998 Eldorado ETC
    Join Date
    Jun 2012

    Re: '98 Eldorado Alternator Replacement

    Yes, bbuffalo, thank you. I have significant mechanical experience so I seldom look for info except where specs are needed. I am well into senior status too and my 1998 Eldo alternator just failed at 107,000 miles. I had access to a lift so the job was easier than it might have been. After I got the alternator loose I discovered it would not drop through the access hole that I thought was made for its removal. So, I Googled the subject on my phone and found this thread. I then decided the lower alternator mounting bracket made of heavy aluminum and mounted to the block had to be unbolted from the block to enable clearance for the alternator to drop out. The fan does have to be out of the way as you said. If I had hands the size of a 10 year old I think it would have been an easier job. A 15MM ratchet type box wrench as well as swivel head sockets, 6", 12" extensions and a hinged head 3/8" ratchet, I think, were a minimum requirement. When installing the new alternator you have to hold it up out of the way while you install the lower aluminum mounting bracket mentioned above. I did not remove my battery but I did of course disconnect the ground cable. In the flat rate manual, this job is 3.5 hours. It took me 4.5 hours. In my opinion this is not a job for the average shade tree mechanic. By the way, double check your serpentine belt tracking after it is installed. I had to loosen and reposition mine on the crank shaft 3 times to get it right.

  10. #9
    clarkz71's Avatar
    clarkz71 is offline Cadillac Owners Connoisseur
    Automobile(s): 2000 Eldorado ESC
    Join Date
    Mar 2006
    Fort Lauderdale, Florida

    Re: '98 Eldorado Alternator Replacement

    Quote Originally Posted by tsgrpr97 View Post
    Not every vehicle has that panel
    My 95 base Eldo had it.

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