348 - Weird issue reinstalling 348 Alternator | FerrariChat
Buy

348 Weird issue reinstalling 348 Alternator

Discussion in '348/355' started by aballas, Jun 23, 2023.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. aballas

    aballas Karting

    Jul 29, 2017
    134
    Portland, OR
    #1 aballas, Jun 23, 2023
    Hi all,

    just recently rebuilt the 105A Denso alternator on my '94 348 Spider, and I'm having the weirdest issue getting it back in the car.

    A little background, the car was a little unique, it had a power steering conversion, using Mondial T parts and an F355 steering rack. I actually used this opportunity to go back to manual steering, and as such have removed the Mondial steering pump, which in turn changes the location of the upper mount for the alternator.

    I sourced the correct upper mount (p/n 149627), and went about reinstalling things.

    HOWEVER.... the mounting holes on the Alt no longer line up with the upper and lower mounting brackets. Its *close* but off by a few millimeters preventing me from being able to get both bolts in. To verify it wasn't the incorrect upper mount I also tried reinstalling it with the steering pump upper mount (as it was in the car previously) and I am running into the same issue.... a few mm (maybe 4-5mm) out of alignment.

    I cannot for the life of me figure out what would be causing this, or how to remedy it. Has anyone else run into a similar issue?
     
  2. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,979
    socal
    #2 fatbillybob, Jun 23, 2023
    For 348 there were 2 alternators. So possibly 2 mounts. Been years can't remember. Can you drill to size?
     
  3. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,979
    socal
    #3 fatbillybob, Jun 23, 2023
    Are there 2 mount part nos
     
  4. Ferrarium

    Ferrarium F1 Veteran
    Sponsor Rossa Subscribed

    Jul 28, 2018
    5,728
    Central NJ
    Full Name:
    Eric
    #4 Ferrarium, Jun 23, 2023
    Last edited: Jun 23, 2023
    Need pic I'm afraid. I had my alternator and brackets off and I recall some issue getting them back on correct, can't recall exactly bit it was alignment related.

    There was Delco and Denso alternators but you said denso alternator and that bracket is the denso bracket. 144639 is the Delco part number. Maybe parts mixed up when sent.

    Is the upper bracket you have curved or straight like this, denso one is straight.

    Image Unavailable, Please Login
     
  5. aballas

    aballas Karting

    Jul 29, 2017
    134
    Portland, OR
    #5 aballas, Jun 23, 2023
    Last edited: Jun 23, 2023
  6. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,979
    socal
    #6 fatbillybob, Jun 23, 2023
    Maybe wrong alternator? But that top hole is a steel bushing in what looks like black delrin bushing. You could make an offset delrin bushing to still use that alternator. We do that all the time to get more camber on streetcars converted to race cars. You could know if that's possible by popping the black bushing out and seeing if that will work.
     
  7. aballas

    aballas Karting

    Jul 29, 2017
    134
    Portland, OR
    #7 aballas, Jun 23, 2023
    It's the alternator that was in the car.... i rebuilt it myself. It's pn 155785.... it's the right alternator..
     
  8. aballas

    aballas Karting

    Jul 29, 2017
    134
    Portland, OR
    #8 aballas, Jun 23, 2023
    Image Unavailable, Please Login

    This is from the eurospares website. Referencing the part number. This is the part number that's on my alternator that you can see in the picture above.... It's the right alt.
     
  9. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,979
    socal
    #9 fatbillybob, Jun 23, 2023
    What if guy who mod the steering etc mod the alt?
     
  10. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,979
    socal
    #10 fatbillybob, Jun 23, 2023
    These cars change hands so often anything possible
     
  11. aballas

    aballas Karting

    Jul 29, 2017
    134
    Portland, OR
    #11 aballas, Jun 23, 2023
    Here's the thing though..... I even tried putting it back in with the mondial upper mount as well. (how it was in the car when i took it out) Same issue. doesn't line up.

    There's something that has changed with the alignment of how things mount, but i can't see how there is any way to adjust that.
     
  12. Ferrarium

    Ferrarium F1 Veteran
    Sponsor Rossa Subscribed

    Jul 28, 2018
    5,728
    Central NJ
    Full Name:
    Eric
    #12 Ferrarium, Jun 23, 2023
    Right but the front of the alternator could have been changed giving it slightly different mount location?
     
  13. aballas

    aballas Karting

    Jul 29, 2017
    134
    Portland, OR
    #13 aballas, Jun 23, 2023
    No.... I didn't make any changes to it, and it wouldn't even go in with the previous mounts with which it was installed.

    Something changed between me taking these things out of the car, rebuilding the alternator, and now trying to get it back in the car. This has nothing to do with any previous modifications done to the car or the alternator, because if that was the case I would be able to get it to fit again with the old parts (the only new part I had to source was the upper mount) yet here I am. It won't fit with any of the parts I have.
     
  14. Ferrarium

    Ferrarium F1 Veteran
    Sponsor Rossa Subscribed

    Jul 28, 2018
    5,728
    Central NJ
    Full Name:
    Eric
    #14 Ferrarium, Jun 23, 2023
    Ok so the same alternator was in with diff bracket and that bracket no longer works either got it.

    As I said, I took mine off on a motor rebuild and has similar issue, was very confused too, forget exactly what happend but it fit again after not fitting, don't recall if it took it all back off and redid it or what exactly.

    Sorry can help more but I experienced that. Mine is also a denso.

    Sent from my SM-G990U using FerrariChat.com mobile app
     
    aballas likes this.
  15. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,979
    socal
    #15 fatbillybob, Jun 23, 2023

    Sounds like op install error. Sometimes slop error adds up. Try loosening all brackets and in stall alt. Does it now fit with loose bracket? If yes the try mild gentle finger tight brackets work alt. On. That will slide bracket into position. Remove alt tighten bracket bit more. Alt install then remove and tight bracket and alt should fit.
     
    aballas likes this.
  16. m.stojanovic

    m.stojanovic F1 Rookie
    Silver Subscribed

    Dec 22, 2011
    3,219
    Serbia - Niš
    Full Name:
    Miroljub Stojanovic
    #16 m.stojanovic, Jun 23, 2023
    Bob's advice above will most probably solve your issue. The two holes on the upper bracket for mounting the bracket to the engine are rather close to each other so the clearance of these holes to their studs would allow quite a bit of movement (up and down) of the hole for the alternator. You probably pushed the upper bracket upwards while tightening the two studs. If you release the two nuts holding the bracket to the engine, you should be able to bring the end of the bracket (the hole for the alternator) quite a bit down and align it.
     
    aballas likes this.
  17. 32 Ford

    32 Ford Karting

    Jan 31, 2021
    175
    vancouver
    Full Name:
    Mike McGowan
    #17 32 Ford, Jun 25, 2023
    is it Possible the front and rear casings were "clocked" wrong when is was re assembled.?Happened to my buddy. Bought 2 alternators thinking they were wrong. He just need to re clock the case to lign up the holes.
     
  18. 348Jeff

    348Jeff Formula 3

    Oct 25, 2011
    1,531
    UK
    Full Name:
    Jeff
    #18 348Jeff, Jun 25, 2023
  19. aballas

    aballas Karting

    Jul 29, 2017
    134
    Portland, OR
    #19 aballas, Jun 26, 2023
    This particular alternator there isnt a way to "clock" it... there's really only one way it goes together.

    That said....I did eventually get it.

    I had to loosen up the upper mount... it didnt seem like there was much play/slop in it, but it was apparently enough to keep things from going back together unless it was exactly right
     
  20. aballas

    aballas Karting

    Jul 29, 2017
    134
    Portland, OR
    #20 aballas, Jun 26, 2023
    This actually ended up working.. thank you
     
    steved033 and fatbillybob like this.
  21. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,979
    socal
    #21 fatbillybob, Jun 26, 2023
    glad it worked out. We have all been there…
     
    aballas likes this.
  22. KevZep

    KevZep Formula Junior

    Feb 17, 2020
    568
    New Zealand
    Full Name:
    Kevin Bennett
    #22 KevZep, Jun 28, 2023
    I can remember there was some fiddling to get mine on when I had the engine out, there isn't much room, it has to be lined up just right...

    Good you got it sorted!!
     
    aballas likes this.

Share This Page