Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2016 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You

Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKVI-A6 Golf family including Jetta SportWagen (~ 2010-2014)

VW MKVI-A6 Golf family including Jetta SportWagen (~ 2010-2014) Discussions area for A6/MkVI (2010-2014) Golf and Golf Wagons (Jetta Sportwagon in the USA).

Thread Tools
Old July 17th, 2017, 11:26   #1
Join Date: Jun 2016
Location: Baton Rouge, LA
Default Alternator question

About a 60 days ago I had a leaking aux fuel pump that was discovered due to starting problems. The fuel pump, associated hoses, and the serpentine belt were replaced (since the belt got wet with diesel).
Now yesterday I had a dead battery and had to push-start to get home. I figured it was a bad battery although it's only a little over a year old. Took it to O'Reilly where I got the battery, they tested and said the battery is good but the voltage regulator is bad. This makes sense because at idle the voltage is 11.5v to 12v instead of the normal 14-15v, and I can charge the battery and everything works until it's soon depleted due to not charging from the alternator.
My question is this: Do you think the two events, leaking aux fuel pump dripping diesel, and later the alternator failing could be related? If diesel on the serpentine belt is a problem, could diesel on the alternator cause it to fail after a couple months? I'm not certain it did get wet, but given the location, it seems very possible.
jmsparks is offline   Reply With Quote
Old July 17th, 2017, 12:31   #2
Veteran Member
turbobrick240's Avatar
Join Date: Nov 2014
Location: maine

Could be related to the diesel leak. Did you pressure wash the engine bay after the leak? Water could also be the culprit if so.
turbobrick240 is offline   Reply With Quote
Old July 17th, 2017, 12:53   #3
Veteran Member
meerschm's Avatar
Join Date: Apr 2009
Location: Fairfax county VA

You need to properly troubleshoot the electric system first.

Free advice: it is worth what you pay for it. (sometimes)
meerschm is offline   Reply With Quote
Old July 17th, 2017, 14:44   #4
Join Date: Jun 2016
Location: Baton Rouge, LA

I had the leaking aux fuel pump handled at the dealership because I was in a hurry. So I'm not sure what they did to clean the engine compartment afterward. 2micron here told me exactly what the problem was a day after I put it in the shop - could have saved $1000 following his advice. Oh well. Just needed a better washer on a connection to the pump, not a whole new pump and fuel lines.

For the alternator I did take it to a local VW specialist (Moberly's) and he did concur that it was the voltage regulator. I picked up a remanufactured Bosch alternator from O'Reilly's since he quoted a remanufacture as well at 3x the cost. He's replacing it now (yep, in a hurry again - really wish I had time to do it myself).
jmsparks is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
alternator question N.CaTDI VW MKV-A5 Golf/Jettas 2 May 30th, 2017 21:09
Alternator question cricketo99 VW MKIV-A4 TDIs (VE and PD) 4 February 14th, 2017 16:16
Alternator Question Jeepmb TDI 101 5 April 7th, 2009 17:04
alternator question??? husky TDI 101 12 February 23rd, 2009 14:02
Alternator question Nitrowolf VW MKIV-A4 TDIs (VE and PD) 10 December 31st, 2005 13:38

All times are GMT -7. The time now is 21:40.

Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2017
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2017, All Rights Reserved
Page generated in 0.11731 seconds with 13 queries
[Output: 63.41 Kb. compressed to 56.86 Kb. by saving 6.55 Kb. (10.32%)]