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syncrodoka Samba Member
Joined: December 27, 2005 Posts: 12005 Location: Santa Cruz, CA
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Posted: Thu Oct 01, 2009 9:17 pm Post subject: |
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19-21V. output is waaay too high
I found a article on how to put a 90 amp golf/jetta alt. in a vanagon. Vanagon alternators put out 65 amps. Maybe this will help you get a replacement part easier. Good luck.
http://www.relitech.com/90alt.htm |
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allsierra123 Samba Member
Joined: August 19, 2006 Posts: 1462 Location: Tecate, Baja California MX
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Posted: Thu Oct 01, 2009 10:13 pm Post subject: |
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Mine was actually A 120 amp. Its an aaz engine so not a vanagon part. I have the stock one which is a 65 as well. But I also have a 90 out of a corrado which I was hoping would give me the tack signal needed for my Gasser tach. _________________ 95 GMC Yukon 6.5 TD 2 Door Tow pig/ Daily driver.
91 Vanagon GL. 1.9TD Conversion Sold
81 Vw rabbit 1.6 Diesel. Sold |
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?Waldo? Samba Member
Joined: February 22, 2006 Posts: 9752 Location: Where?
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Posted: Thu Oct 01, 2009 11:39 pm Post subject: |
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Most likely your voltage regulator is bad and causing all the trouble. |
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allsierra123 Samba Member
Joined: August 19, 2006 Posts: 1462 Location: Tecate, Baja California MX
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Posted: Fri Oct 02, 2009 4:28 am Post subject: |
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Yeah I thought it might be. Its under warranty I just have to ship it off to them to get it replaced. In the meantime I have spares. Was kinda nice though with those super bright lights and all. _________________ 95 GMC Yukon 6.5 TD 2 Door Tow pig/ Daily driver.
91 Vanagon GL. 1.9TD Conversion Sold
81 Vw rabbit 1.6 Diesel. Sold |
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syncroserge Samba Member
Joined: November 26, 2005 Posts: 553 Location: Okotos, Alberta, Canada
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Posted: Fri Oct 02, 2009 6:40 am Post subject: |
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allsierra123 wrote: |
Was kinda nice though with those super bright lights and all. |
Yup, I liked the 120A so much on my TDI I put on a 140A. If yours is a
camper did you notice the fridge stays colder on 12V?
There are 150, 180 and 190A alternators from VW now but I haven't
seen them yet so I don't know if they fit the same bracket..hopin'.. |
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PDXWesty Samba Member
Joined: April 11, 2006 Posts: 6242 Location: Portland OR
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Posted: Fri Oct 02, 2009 7:13 am Post subject: |
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The alternator may be fine. Your voltage regulator may have gone bad. _________________ 89 Westy 2.1 Auto |
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tencentlife Samba Member
Joined: May 02, 2006 Posts: 10075 Location: Abiquiu, NM, USA
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Posted: Fri Oct 02, 2009 8:05 am Post subject: |
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Bad regulator, and now you have another bad battery. Sounds like two cells are shorted internally. That's what you'd expect putting 19V into it. _________________ Shop for unique Vanagon accessories at the Vanistan shop:
https://intrepidoverland.com/vanistan/
Please don't PM here, I will not reply.
Experience is kryptonite to doctrine. |
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devesvws Samba Member
Joined: January 05, 2004 Posts: 1540 Location: madison va
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Posted: Fri Oct 02, 2009 12:09 pm Post subject: |
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like i said earlier dont rule out the new alternator or battery. it never fails its the last thing i think it could be, plus just about everything you buy today is junk. starters are the worse, i went through 4 new starters in less than a year for my golf. the last one i put on cracked at the solenoid bolt for the battery. i said to hell with it and went to the junk yard and found a oem starter and it did just fine. _________________ THE FEW THE PROUD THE ORIGINAL VW WATERBOXER -> looking for a original 91 vanagon owners manual with 1991 on the cover http://www.youtube.com/watch?v=pmuiG2tUsP4&feature=share https://picasaweb.google.com/101290228103300323836/BostonBobFlywheelVideo#5543000332201103922 |
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Franklinstower Samba Member
Joined: September 21, 2006 Posts: 1895 Location: PNW
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Posted: Fri Oct 02, 2009 1:07 pm Post subject: |
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didn't read the whole post so this may be redundant, but sounds like you have a bad voltage regulator. Overcharging the battery will definately toast the battery. Some regulators dump any extra voltage to ground - which may be causing the hot neg cable.
Take the alt to a FLAPS and have them test it.
Paul _________________ '89 Westy - EJ25/22 Frank 4.44 5mt
'75 Miami Blue Sunroof FI Standard Bug |
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?Waldo? Samba Member
Joined: February 22, 2006 Posts: 9752 Location: Where?
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Posted: Fri Oct 02, 2009 1:25 pm Post subject: |
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Franklinstower wrote: |
didn't read the whole post so this may be redundant, but sounds like you have a bad voltage regulator. |
You're the 4th person to give that diagnosis in this thread. Always good to have a unified front. |
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Captain Pike Samba Member
Joined: December 30, 2003 Posts: 3340 Location: Talos IV, Piedmont Arizona
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Posted: Fri Oct 02, 2009 1:50 pm Post subject: |
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That battery must have boiled to death__19v__I bet the lights got bright. That kind of power would have fried the wasser ECU.
Did you read this http://www.thesamba.com/vw/forum/viewtopic.php?t=3...highlight=
Boiling the bat(over charge) like that could cause an explosion.
Check the bat and see how much fluid is left. _________________ LEARN TO SELF RESCUE
59 Panel bus, 1966 Single cab. 73' 181. 73 Westy. 91' H6 Vanagon 3.3L.
.....................All Current....................... |
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Alaric.H Samba Member
Joined: March 28, 2009 Posts: 2529 Location: Sandy Springs GA
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Posted: Fri Oct 02, 2009 2:08 pm Post subject: |
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westyventures wrote: |
danfromsyr wrote: |
when I swapped from Gas to Diesel, the Ground cable liked to smoke too.
mine was even worse though as the long positive cable from under the pass front seat was in a 1980 aircooled and aren't as robust as the cables in the ~85+ vans.
VW put the Diesel battery & cables in the back for a reason. and not so they'd stay warm @ night.
I solved my problem by adding a starting battery under the backseat and used the stock battery as my cabin battery.
use as heavy a cable as you can, Diesel starters like to take alot of power.
Dan in NY |
VW did it that way because they didn't know better early on, but neglected to change the diesel battery location in the later years when they knew better. My 1990 TD Syncro still has the battery beside the engine, BUT my converted TDI Syncro still has the original battery location under the passenger seat. The key here is the large (2-0?) cable size used from 1986 on. Plus they went to the planetary drive starters on the later diesels. So the front location is just fine, even when I've started it in sub-zero temps. Heavy short ground cable are a must as well. |
Its 4-0 |
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allsierra123 Samba Member
Joined: August 19, 2006 Posts: 1462 Location: Tecate, Baja California MX
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Posted: Fri Oct 02, 2009 7:10 pm Post subject: |
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Well Thanks for all the help. I wasnt going to keep that Alt on there anyway. I and took the battery back this evening and exchanged it So I need to put on the corrado Alternator And Play around with Trying to clean the contacts On my little blinking coolant lights I will test it and see if the regulator is bad like so many before have stated. _________________ 95 GMC Yukon 6.5 TD 2 Door Tow pig/ Daily driver.
91 Vanagon GL. 1.9TD Conversion Sold
81 Vw rabbit 1.6 Diesel. Sold |
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VWhiker Samba Member
Joined: March 17, 2008 Posts: 22 Location: Elverson, Pennsylvania
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Posted: Thu Sep 30, 2010 2:01 pm Post subject: |
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While in the shop for unrelated problems our alternator failed. Our mechanic replaced it; on the drive home we noticed the battery was getting very hot. We returned to the shop, found that it was putting out 17 - 18 volts and that it had boiled our 6 month old battery. They replaced the alternator again and said that the voltage regulator was internal to it (is this true?). It is now putting out the approximately 14.8 expected.
They left the battery alone, not sure that it would fail. Now (home) it has, and I find the acid took some of the paint off the inside of they battery box, down to bare metal.
Any thoughts about my next move? How to neutralize and stabilize the paint? Any other recourse? _________________ Dan
'84 Rabbit GTI
'85 Westy "Buttercup"
'92 Mazda Miata
'03 Jetta
'04 Jetta wagon TDI (wife's car)
'96 Autozam Scrum (ORV) |
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Volksaholic Samba Member
Joined: December 26, 2005 Posts: 1771 Location: Salt Lake City, Utah, USA
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Posted: Thu Sep 30, 2010 3:45 pm Post subject: |
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VWhiker wrote: |
While in the shop for unrelated problems our alternator failed. Our mechanic replaced it; on the drive home we noticed the battery was getting very hot. We returned to the shop, found that it was putting out 17 - 18 volts and that it had boiled our 6 month old battery. They replaced the alternator again and said that the voltage regulator was internal to it (is this true?). It is now putting out the approximately 14.8 expected.
They left the battery alone, not sure that it would fail. Now (home) it has, and I find the acid took some of the paint off the inside of they battery box, down to bare metal.
Any thoughts about my next move? How to neutralize and stabilize the paint? Any other recourse? |
At the very least I'd hit the mechanic up for a new battery. I know it wasn't his fault that the alternator had a bad regulator, but the nice thing about paying someone the $$$ to do the repair is that you've got someone to go after if things go awry. If he had put a meter on it and revved the engine before letting you take the vehicle he would have identified the problem.
WRT the battery box... I'd remove any loose paint at the very least and flush it with fresh water. After that you could neutralize any remaining acid with baking soda and leave it, or flush it again, let it dry, and hit it with rust converter. I did the rust converter on mine and then a good quality zinc primer, and I was hitting the radiator bay with rubberized undercoating so I squirted some in the battery box too. On top of that, I already had my battery sitting on one of those battery mats that one or more of the Vanagon parts vendors sells so I reinstalled that. Probably overkill, and knowing battery boxes I'll probably be addressing rust again at some point anyway.
pd _________________ 1988 Wolfsburg Edition, 2001 Subaru EJ251 |
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devesvws Samba Member
Joined: January 05, 2004 Posts: 1540 Location: madison va
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Posted: Thu Sep 30, 2010 5:14 pm Post subject: |
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VWhiker wrote: |
While in the shop for unrelated problems our alternator failed. Our mechanic replaced it; on the drive home we noticed the battery was getting very hot. We returned to the shop, found that it was putting out 17 - 18 volts and that it had boiled our 6 month old battery. They replaced the alternator again and said that the voltage regulator was internal to it (is this true?). It is now putting out the approximately 14.8 expected.
They left the battery alone, not sure that it would fail. Now (home) it has, and I find the acid took some of the paint off the inside of they battery box, down to bare metal.
Any thoughts about my next move? How to neutralize and stabilize the paint? Any other recourse? |
yes and no, most internal voltage regulators are easy to replace, but finding just the regulator vs a new alt right away might be how your mechanic makes his living. its a easy job and the mark up is profitable to replace the whole alt + new belt etc. replace just the regulator god forbid i dont think there's not much profit in it. just for example http://www.ehow.com/how_4521251_replace-voltage-regulator-vw-jetta.html a smart mechanic can milk hundreds of dollars aweek from customers doing this. i'm not saying i'm just saying. the battery can take alot. if its holding a charge, its probably ok. wash the area with soap and water and use some rustoleum. its only a big deal if you make it one. i would however look very close at the guy at the shop that works on your car. my thought are, its way to much (acceptable fraud) in the auto repair business, and people just bend over and take it. _________________ THE FEW THE PROUD THE ORIGINAL VW WATERBOXER -> looking for a original 91 vanagon owners manual with 1991 on the cover http://www.youtube.com/watch?v=pmuiG2tUsP4&feature=share https://picasaweb.google.com/101290228103300323836/BostonBobFlywheelVideo#5543000332201103922 |
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