Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

View Poll Results: Alternator life span
30000 miles 1 5.26%
60000 miles 6 31.58%
90000+ miles 12 63.16%
Voters: 19. You may not vote on this poll

Reply
 
LinkBack Thread Tools Display Modes
Old 01-03-2011, 04:28 PM   #1
Registered User
 
Join Date: Mar 2007
Location: Sunnyvale, CA
Posts: 52
Poll: alternator life span

Mine just gave up while i was driving locally and while waiting for the tow truck, i was wondering how long does this part usually last. The range of data may be huge but i thought interesting to look at.

So post up!

__________________
2003 Boxster 2.7L 5 spd
Maxodus is offline   Reply With Quote
Old 01-03-2011, 07:14 PM   #2
Registered User
 
Join Date: Mar 2008
Location: NH
Posts: 110
It depends on what failed in the alternator.
Brushes usually last 200,000 miles +.
Pulley can fail anytme as well as diode bridge or regulator.
Bearings last along time as well.

Many alternators only need a brushes, regulator or pully for repair.
__________________
NH

Last edited by Frank M; 01-18-2011 at 05:28 PM.
Frank M is offline   Reply With Quote
Old 01-04-2011, 09:47 AM   #3
Registered User
 
Join Date: Mar 2007
Location: Sunnyvale, CA
Posts: 52
Good points Frank - i'm gonna take out mine and scrutinize which particular component failed me. Putting my Sherlock Holmes hat on.
__________________
2003 Boxster 2.7L 5 spd
Maxodus is offline   Reply With Quote
Old 01-18-2011, 04:55 PM   #4
Registered User
 
Join Date: Mar 2007
Location: Sunnyvale, CA
Posts: 52
Some progress...

some progress - opened up the engine bay and bearings and wiring and brushes on the alternator "looked" ok. So the other components may be at fault here (thinking regulator).

Gotta get my hands dirty and dig into the bay and pull out the alternator! Tight spot i've heard...
__________________
2003 Boxster 2.7L 5 spd
Maxodus is offline   Reply With Quote
Old 01-20-2011, 08:44 AM   #5
Registered User
 
Join Date: Mar 2008
Location: near Chicago
Posts: 523
Before you think about removing your alternator, spray the sleeve at the rear of the inboard bolt with PB Blaster a day ahead of time. Then do it again shortly (an hour or so) before you try to remove your alternator. I broke my alternator trying to get it out. While JB Weld fixed it, it was a PITA.

Also, be VERY careful if you remove your regulator. On two alternators with two screws each, I broke off 3 of the 4. They are tough to remove.
Mike_Yi is offline   Reply With Quote
Old 01-20-2011, 09:56 AM   #6
Registered User
 
Join Date: Jan 2011
Location: San Diego
Posts: 11
I think 90000+ is normal. 125000mi on your alt is when you should stop thinking about long trips.
__________________
http://unitwan.co.nr/9511.htm
MSull788 is offline   Reply With Quote
Old 01-28-2011, 11:39 AM   #7
Registered User
 
Join Date: Mar 2007
Location: Sunnyvale, CA
Posts: 52
Quote:
Originally Posted by Mike_Yi
Before you think about removing your alternator, spray the sleeve at the rear of the inboard bolt with PB Blaster a day ahead of time. Then do it again shortly (an hour or so) before you try to remove your alternator. I broke my alternator trying to get it out. While JB Weld fixed it, it was a PITA.

Also, be VERY careful if you remove your regulator. On two alternators with two screws each, I broke off 3 of the 4. They are tough to remove.
Thanks for the pointers regarding the regulator screws - i better watch out for them this weekend when i try to remove them!
__________________
2003 Boxster 2.7L 5 spd
Maxodus is offline   Reply With Quote
Old 02-14-2011, 03:36 PM   #8
Registered User
 
Join Date: Mar 2007
Location: Sunnyvale, CA
Posts: 52
thanks for the votes yeah it looks like mine died relatively early - not sure what could have caused it. I have all stock electronics too, not like i'm pumping a huge AMP at the back.

The Autozone alternator tester showed failure on all parts (VR, rectifier and the diode thing).

I'm an electronic dummy but what should i check for when i suspect something in the car is causing the alternator to work harder than usual?
__________________
2003 Boxster 2.7L 5 spd
Maxodus is offline   Reply With Quote
Old 02-14-2011, 03:40 PM   #9
Registered User
 
Join Date: Mar 2007
Location: Sunnyvale, CA
Posts: 52
And for the record - i did have a flat battery 2 years ago (the original battery) and i tried to trickle charge it back up a few times and drive the car before i got a new one (Duralast brand). I've heard, afterwards, that this may not be kind to the alternator.

I've been running the car with the Duralast battery since then with no problem starting the car up.

__________________
2003 Boxster 2.7L 5 spd
Maxodus is offline   Reply With Quote
Reply


Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 06:32 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page