Road trip alternator trouble, help needed..

[Lloyd]

Hello, think I might need some continental forum help...

Wife and I are on the way to. Rostock in northern Germany for two weeks holiday. We're travelling. On the ferry from Harwich to Hook of Holland and then over to Rostock.


All was well until I saw the voltage gauge reading 12v and then 10v. The dash red alternator lamp was showing slightly. Having just had my alternator reconditioned I'm not impressed. I can only think the new one is also on the way out.

Are there any forum members in Holland, northern Germany, Rostock that have an alternator to hand? Just thinking about what to do if this dies completely.

I've checked the terminals and all seems to be ok. What could be wrong? Is there anything I can can check on the alternator itself apart from the terminals. Why would the output fluctuate so much?

Any advice or help most welcome. As things stand, we're going to try and get to Rostock in daylight. t

[Error404]

make sure the belt is tensioned correctly, and that the regulator is clean (you can remove the reg with the alternator in situ)

[shaun5]

You want to try and charge the battery at night and drive with as little on as possible.

[s2driveruk]

belt tension i reckon....i had this on way to Le Mans last year, small tweak and back to normal

[Lloyd]

Thanks for the quick response. much appreciated.

I've checked the tension and it seems ok. I can just about twist the belt 90 degrees in the middle, which I thought was about right?

Error, would you please give me an idiots guide to removing and cleaning the rectifier?
I guess it's under the black plastic shroud at the back of the alternator, right?

I was watching the voltage guide as I was driving onto the ship and it literally jumped from 12v to 10v and then stayed at about 10v.

What do most peoples cars gauges show? I seem to recall it should be at about 14v all the time right?

What's unusual is that the gauge fluctuates for no reason that I can discern, more recently just staying around 10v.

I will certainly try to drive in the daytime and charge the battery at night.

[Mikes2]

Belt should only be able to be deflected 10mm on the longest section.

If you can twist it 90 degrees, it's not tight enough

[Lloyd]

Okay, thanks for the advice. I'll get it nipped up asap. Much appreciated.

[GT500]

You can replace the voltage regulator. Two screws, Phillips heads on the back of the alternator. Any Bosch place will have one. I carry a spare in the door pocket just in case...
Hth

[Error404]

Belt should only be able to be deflected 10mm on the longest section.

If you can twist it 90 degrees, it's not tight enough

Try this first.
If not try cleaning the regulator brushes.
To remove the regulator you need to remove the black plastic cover and its held in with two phillips head screws.

EDIT: Rob beat me to it

[Lloyd]

Thanks very much Rob & Error. I will check both in the morning.
Hopefully it will be quickly fixed. I will update when I know more.

[Sleeper_Avant]

the regulator is common for many makes of car and not model specific

should you need to replace it

[Lloyd]

Does anyone have a Bosch part number for the replacement rectifier?
Any Alternator part numbers/model numbers to help work out what rectifier?

Thanks again. Fingers crossed she starts OK this morning.

[macspring]

Bump, someone assist Llyod, we’d all appreciate some assistance if one of us were in his position.

Get the part numbers from a main Audi dealer and if they don’t offer to assist for reasonable money then maybe....

A small decent looking garage in a small village maybe able to assist you with the use of a ramp if you explain your predicament.

I presume you have a sat nab, with points of interest, i.e. garages listed.

Best wishes with the situation. Hope you enjoy the trip.

Post any photos if you get the chance.

Kind regards.

[GT500]

Here you go....

CROSS
REFERENCE
BMW 12311271664
BMW 12311726002
BMW 12311735742
BOSCH 0192052015
BOSCH 0192052016
BOSCH 0192052020
BOSCH 0192052021
BOSCH 0192052024
BOSCH 0192052025
BOSCH 0192052027
BOSCH 0192052029
BOSCH 0192052032
BOSCH 0192052035
BOSCH 1192052015
BOSCH 1192052016
BOSCH 1192052020
BOSCH 1192052021
BOSCH 1192052024
BOSCH 1192052025
BOSCH 1192052027
BOSCH 1192052029
BOSCH 1197311004
BOSCH 1197311005
BOSCH 1197311006
BOSCH 1197311010
BOSCH 1197311011
BOSCH 1197311012
BOSCH 1197311013
BOSCH 1197311021
BOSCH 1197311024
BOSCH 1197311026
BOSCH 1197311027
BOSCH 1197311030
BOSCH 1197311031
BOSCH 1197311034
BOSCH 1197311036
BOSCH 1197311037
BOSCH 1197311038
BOSCH 1197311040
BOSCH 1197311041
BOSCH 1197311043
BOSCH 1197311045
BOSCH 1197311048
BOSCH 1987311030
BOSCH 2197311021
BOSCH 2197311026
BOSCH 2197311029
BOSCH 2197311032
BOSCH 9121337079
BOSCH 932010
BOSCH UCB403
BOSCH UCB409
DELCO/FORD 1640169
DELCO/FORD 21221432
DELCO/FORD 6113735
DELCO/FORD 82BB10316AA
DELCO/FORD 82BBAA
DELCO/FORD E5RD10316BA
DELCO/FORD E5RDBA
DEUTZ 93155548
FENDT X830060022010
FIAT 60743997
FIAT 60751135
FIAT 60751403
FIAT 60751439
FIAT 9938171
FIAT 9942848
FIAT 9942885
FIAT 99428884
FIAT 9950155
FIAT 9960176
FIAT/MARELLI 60743997
FIAT/MARELLI 60751439
FIAT/MARELLI 9938171
FIAT/MARELLI 9942848
FIAT/MARELLI 9942885
FIAT/MARELLI 9960176
FORD 82BB10316AA
FORD E5RD10316BA
INTERNATIONAL HARVESTER 1530372C1
ISKRA 11251120
KHD 81211111
LUCAS 21221349
LUCAS 21221432
LUCAS UCB403
PORSCHE 92860315300
PORSCHE 94460314100
PORSCHE 94460314101
ROMEO ALFA 116100506011
ROMEO ALFA 119130506023
ROMEO ALFA 705684800000
SEAT 003899919
VAUXHALL/OPEL 1204253
VAUXHALL/OPEL 1204256
VAUXHALL/OPEL 1204259
VAUXHALL/OPEL 90007041
VAUXHALL/OPEL 90349704
VAUXHALL/OPEL 90349907
VOLKSWAGEN 068903803
VOLKSWAGEN 068903803B MAP1C1
FITS BOSCH ALTERNATORS
0120339547 0120468001 0120468002 0120468003 0120468004 0120468005
0120468006 0120468007 0120468008 0120468013 0120468014 0120468017
0120468018 0120468019 0120468020 0120468022 0120468023 0120468024
0120468028 0120468029 0120468030 0120468031 0120468032 0120468033
0120468034 0120468042 0120468043 0120468044 0120468048 0120468049
0120468050 0120468051 0120468052 0120468055 0120468056 0120468057
0120468058 0120468059 0120468060 0120468061 0120468062 0120468063
0120468064 0120468067 0120468068 0120468069 0120468070 0120468071
0120468072 0120468073 0120468074 0120468075 0120468076 0120468077
0120468078 0120468079 0120468088 0120468089 0120468095 0120468096
0120468097 0120468098 0120468099 0120468100 0120468101 0120468102
0120468103 0120468104 0120468105 0120468106 0120468108 0120468109
0120468110 0120468111 0120468112 0120468121 0120468122 0120468123
0120468125 0120468126 0120468134 0120468155 0120469002 0120469003
0120469004 0120469005 0120469006 0120469007 0120469009 0120469011
0120469012 0120469013 0120469015 0120469028 0120469029 0120469034
0120469035 0120469176 0120469522 0120469526 0120469532 0120469540
0120469541 0120469542 0120469543 0120469545 0120469546 0120469548
0120469551 0120469552 0120469553 0120469554 0120469555 0120469556
0120469557 0120469558 0120469559 0120469560 0120469561 0120469566
0120469571 0120469572 0120469575 0120469576 0120469577 0120469578
0120469581 0120469582 0120469586 0120469587 0120469593 0120469594
0120469595 0120469598 0120469599 0120469600 0120469601 0120469602
0120469603 0120469604 0120469605 0120469606 0120469607 0120469610
0120469611 0120469617 0120469618 0120469619 0120469621 0120469622
0120469623 0120469624 0120469629 0120469630 0120469631 0120469632
0120469633 0120469635 0120469636 0120469637 0120469638 0120469639
0120469640 0120469646 0120469647 0120469648 0120469649 0120469650
0120469651 0120469654 0120469655 0120469656 0120469657 0120469658
0120469659 0120469660 0120469661 0120469662 0120469666 0120469671
0120469672 0120469674 0120469675 0120469676 0120469677 0120469687
0120469688 0120469689 0120469696 0120469697 0120469698 0120469699
0120469700 0120469701 0120469702 0120469703 0120469704 0120469705
0120469706 0120469707 0120469708 0120469710 0120469711 0120469712
0120469713 0120469714 0120469715 0120469716 0120469717 0120469718
0120469719 0120469720 0120469721 0120469727 0120469728 0120469732
0120469733 0120469734 0120469735 0120469737 0120469739 0120469742
0120469743 0120469747 0120469748 0120469749 0120469754 0120469757
0120469758 0120469759 0120469762 0120469768 0120469775 0120469776
0120469777 0120469778 0120469779 0120469780 0120469781 0120469782
0120469783 0120469790 0120469794 0120469795 0120469804 0120469805
0120469806 0120469815 0120469816 0120469817 0120469819 0120469822
0120469823 0120469827 0120469828 0120469829 0120469830 0120469831
0120469832 0120469833 0120469834 0120469835 0120469836 0120469843
0120469845 0120469846 0120469847 0120469848 0120469852 0120469853
0120469858 0120469859 0120469860 0120469861 0120469862 0120469863
0120469868 0120469869 0120469870 0120469871 0120469874 0120469875
0120469876 0120469877 0120469878 0120469879 0120469885 0120469886
0120469887 0120469888 0120469892 0120469893 0120469895 0120469899
0120469901 0120469902 0120469903 0120469904 0120469905 0120469906
0120469907 0120469908 0120469911 0120469912 0120469913 0120469914
0120469918 0120469919 0120469936 0120469937 0120469939 0120469940
0120469951 0120469952 0120469955 0120469956 0120469958 0120469962
0120469966 0120469967 0120469968 0120469969 0120469970 0120469971
0120469972 0120469973 0120469974 0120469975 0120469979 0120469980
0120469981 0120469984 0120469985 0120469989 0120469990 0120469998
0120484002 0120484003 0120484012 0120484016 0120484020 0120484023
0120488102 0120488103 0120488109 0120488110 0120488111 0120488112
0120488114 0120488132 0120488133 0120488139 0120488140 0120488141
0120488146 0120488147 0120488148 0120488149 0120488150 0120488151
0120488152 0120488174 0120488176 0120488177 0120488178 0120488179
0120488180 0120488181 0120488182 0120488183 0120488184 0120488188
0120488189 0120488194 0120488195 0120488207 0120488210 0120488211
0120488217 0120488218 0120488219 0120488220 0120488221 0120488222
0120488223 0120488225 0120488228 0120488235 0120488238 0120488243
0120488244 0120488245 0120488246 0120488247 0120488249 0120488250
0120488251 0120488254 0120488263 0120488264 0120488265 0120488267
0120488274 0120488275 0120488276 0120488279 0120488280 0120488282
0120488284 0120488286 0120488290 0120488295 0120489002 0120489003
0120489004 0120489005 0120489006 0120489007 0120489008 0120489009
0120489010 0120489011 0120489012 0120489013 0120489014 0120489015
0120489016 0120489017 0120489018 0120489022 0120489028 0120489029
0120489030 0120489031 0120489032 0120489036 0120489037 0120489038
0120489039 0120489040 0120489041 0120489042 0120489043 0120489044
0120489045 0120489046 0120489057 0120489058 0120489062 0120489063
0120489072 0120489073 0120489076 0120489077 0120489080 0120489081
0120489082 0120489083 0120489084 0120489086 0120489087 0120489088
0120489090 0120489091 0120489092 0120489093 0120489094 0120489095
0120489096 0120489097 0120489098 0120489099 0120489100 0120489101
0120489103 0120489104 0120489105 0120489106 0120489107 0120489108
0120489109 0120489110 0120489111 0120489112 0120489113 0120489114
0120489115 0120489116 0120489117 0120489120 0120489121 0120489122
0120489126 0120489127 0120489128 0120489129 0120489130 0120489131
0120489132 0120489133 0120489134 0120489135 0120489136 0120489137
0120489138 0120489139 0120489140 0120489141 0120489142 0120489143
0120489144 0120489145 0120489146 0120489147 0120489148 0120489151
0120489152 0120489153 0120489154 0120489155 0120489156 0120489167
0120489170 0120489171 0120489172 0120489175 0120489176 0120489186
0120489187 0120489188 0120489191 0120489195 0120489196 0120489197
0120489198 0120489199 0120489200 0120489201 0120489202 0120489203
0120489204 0120489205 0120489206 0120489207 0120489208 0120489209
0120489210 0120489211 0120489212 0120489213 0120489214 0120489215
0120489216 0120489217 0120489218 0120489219 0120489220 0120489228
0120489229 0120489235 0120489236 0120489237 0120489238 0120489239
0120489244 0120489245 0120489246 0120489247 0120489248 0120489249
0120489250 0120489251 0120489252 0120489260 0120489261 0120489262
0120489263 0120489266 0120489267 0120489268 0120489269 0120489272
0120489273 0120489282 0120489283 0120489287 0120489288 0120489289
0120489290 0120489291 0120489292 0120489294 0120489304 0120489305
0120489307 0120489308 0120489313 0120489314 0120489315 0120489317
0120489318 0120489319 0120489334 0120489335 0120489336 0120489337
0120489338 0120489345 0120489346 0120489347 0120489348 0120489349
0120489350 0120489351 0120489352 0120489353 0120489365 0120489366
0120489368 0120489370 0120489371 0120489372 0120489373 0120489380
0120489381 0120489384 0120489385 0120489386 0120489387 0120489389
0120489390 0120489391 0120489392 0120489400 0120489401 0120489402
0120489403 0120489408 0120489418 0120489419 0120489420 0120489421
0120489422 0120489423 0120489424 0120489426 0120489432 0120489433
0120489436 0120489437 0120489438 0120489450 0120489455 0120489460
0120489461 0120489473 0120489474 0120489477 0120489478 0120489485
0120489488 0120489489 0120489498 0120489658 0120489703 0120489704
0120489709 0120489710 0120489723 0120489724 0120489725 0120489726
0120489729 0120489736 0120489737 0120489756 0120489757 0120489779
0120489888 0120489889 0120489891 0120489900 0120489901 0120489902
0120489909 0120489910 0120489960 0120489961 0120489964 0120489965
0120489966 0120489967 0120489968 0120489969 0120489971 0120489972
0120489974 0120489975 0120489976 0120489980 0120489981 0120489982
0120489983 0120489984 0120489985 0120489986 0120489987 0120489988
0120489989 0120489990 0120489991 0120489992 0120489993 0120489994
0120489995 0120489996 0986030580 0986030590 0986030600 0986030610
0986030620 0986030650 0986030670 0986030690 0986030700 0986030710
0986030750 0986030810 0986030830 0986030850 0986030870 0986030900
0986030910 0986030980 0986031110 0986031200 0986031240 0986031410
0986031480 0986031500 0986031530 0986032730 0986033130 0986033160
0986033170 0986033180 0986033190 0986033200 0986033260 0986033340
0986033350 0986033760 0986034040 0986034070 0986034080 0986034110
0986034130 0986034150 0986034160 0986034170 0986034180 0986034190
0986034570 0986034930 0986034990 0986035740 0986035770 0986035800
0986036510 0986036660 0986036760 0986036770 0986036790 0986037070
0986037890 0986038090 0986038100 0986038130 0986038190 0986038330
6033G3030B 6033G3046B 6033G83030 6033GB3030 6033GB3046 6033GB5007
6033GB5009 9120080129 9120080131 9120080217 9120143036 9120144205
9120144206 9120144207 9120144216 9120144217 9120144234 9120144235
9120144236 9120144237 9120144240 9120144281 9120144282 9120144289
9120144290 9120144292 9120144301 9120144305 9120144601 9120144602
9120144603 9120144604 9120144608 9120144609 9120144612 9120144613
9120144614 9120144615 9120144616 9120144619 9120144620 9120334313
9120334314 9120334315 9120334316 9120334320 9120334323 9120334324
9120334327 9120334634 9120334638 9120334641 9120334642 9120335002

[Nuvo]

Voltage regulator (not a rectifier) numbers:

Audi Part number : 028 903 803 D
Bosch number : 1-197-311-028