505 ZDJK/L Alternator
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  1. #1
    Fellow Frogger!
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    Icon7 505 ZDJK/L Alternator

    Has anyone found a suitable alternative to the Motorola alternator fitted to these 505 engines?

    I have just repaired such a Motorola unit by having spare parts from a spare alternator. It did also require a new regulator, as the original literally fried itself.

    Experience and evidence from other 505 owners suggests that once the slip-rings become too worn, rectifier burns out etc, the Motorola unit is simply un-economical to repair.

    I believe that there is a Bosch unit which can be fitted. Anybody replaced their Motorola with something else?

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    Cheers,
    Kim.

  2. #2
    Member alan_505's Avatar
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    I have replaced my motorola regulator with a higher voltage bosch/ingram type, it only requires small modifications and seems to be working OK.

    Alan

  3. #3
    1000+ Posts Wildebeest's Avatar
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    Default 505 alternator...

    Kimdeb.
    Go for a Bosch with built in regulator. Try for an alternator with the same or slightly higher capacity.
    Try your wrecker, they may have one for a late Falcon?

  4. #4
    con
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    Default 505 STi Alternator

    About six years ago, after being unable to find parts to repair my failed Motorola alternator, I replaced it with a Bosch BXU1285 with minimum modification. This 85 amp unit has an internal regulator and has been excellent. The only other change required was the warning lamp, which had to be replaced with a 2watt unit.


    con.....

  5. #5
    1000+ Posts silverexec's Avatar
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    Yep, I've gone with a Bosch unit too. A mate of mine who reconditions alternators had made up an 80A unit to originally fit into his Ford Escort. He hasn't got the car anymore but kept the engine and other bits. The unit fitted quite nicely into the Pug, but we did need to modify the lower mounting bracket to accomodate it.

    Richard
    - Richard

    Now: 405 SRI D70 '93
    - 2.0L manual
    Earlier: 505 GTi Executive '85
    - hence "Silver Exec"...
    25 GTX '86
    - manual conversion

  6. #6
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    Icon7

    Hi all,

    Thanks for all the replies. The Bosch type seems to be the answer, so I will investigate the BXU1285 etc. Will go to the wreckers with the U/S Motorola, and see what matches.

    As the original Motorola is 70 amps, I agree that opting for around 85 amps will make some sense, especially if I replace the viscous fan coupling with a thermatic type.

    Any ball park $$ figures for second hand or new?

    Cheers,

    Kim.

  7. #7
    Budding Architect ???? pugrambo's Avatar
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    Quote Originally Posted by KIMDEB
    Hi all,

    Thanks for all the replies. The Bosch type seems to be the answer, so I will investigate the BXU1285 etc. Will go to the wreckers with the U/S Motorola, and see what matches.

    As the original Motorola is 70 amps, I agree that opting for around 85 amps will make some sense, especially if I replace the viscous fan coupling with a thermatic type.

    Any ball park $$ figures for second hand or new?

    Cheers,

    Kim.


    i think the last time i priced one from a wrecker it was about $110

    you will or may need to shim the bracket one way or the other for it to line up but that's not a big worry

    i keep looking around for one as one day i will replace the one on the 604 as it won't last forever and auto sparks chuck hissy fits if they see something come in that isn't bosch or the other common makes

    you should have seen the local bloke when i took a du sillier starter in to him a while back

    luckily i had a bosch starter that was exactly the same for him to put new bits in
    3 x '78 604 SL

    1 x '98 306 GTi6

    1 x secret project

    1 x '98 406 STDT troop carrier and i don't care if it stinks, i don't sniff it's arse Death by wank tank

    1 x '99 406SV 5spd wagon, time to burn more fuel

    1 x 1994 605 SV3.0


    WTD long range fuel tank for 605

  8. #8
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    Icon7

    Thanks Pugrambo,

    Yes, amazing the reaction sometimes when these people get moved out of their comfort zones (Bosch, Lucas etc).

    Still, the $$$ factor comes into it also, and, if I am to keep the car, then a Bosch alternator is probably going to be the best economic solution.

    Cheers,
    Kim.

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