Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Porsche Buyers Guides
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Consumer Rights Act
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Official Porsche Centre Reviews
Model
Stock
Porsche 911
991 : 2011- 17
997 : 2004- 77
996 : 1997-2005 48
993 : 1993-1998 6
964 : 1989-1993 5
Carrera 3.2 : 1983-1989 0
Carrera SC : 1977-1983 1
930 Turbo : 1975-1989 0
Early 911 : 1964-1977 0
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 15
Cayman : 2005- 17
Cayenne : 2003- 7
Macan : 2014- 3
Panamera : 2009- 1
912-914-924-928-944-968 3
959 - CarreraGT - RaceCar 1
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [991] 2011-Current
Porsche 911 [991]
911 [997] 2004-Current
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message
BK911
Spa-Francorchamps


Joined: 16 Mar 2008
Posts: 320
Location: London

1990 Porsche 964 Carrera 4

PostPosted: Fri Jun 08, 2018 9:34 am    Post subject: 996 C4s Battery Generator Fault - Alternator advice Reply with quote

Hi guys,

Warning light came on last night.. cars 16 years old and on 56k miles... fair enough Laughing

Any advice? An OEM Porsche one is about £1500!! Floor

Indie recommended a Bosch one for about £285

https://www.carparts4less.co.uk/alternator

Is it easy ish to do by yourself?

Any advice welcome
Cheers,
BK Thumb
_________________
996 C4s
Jim Clark Type 25 Elise SC
Ex - 1990 964 C4
 
  
View user's profile Send private message
   
rigsby99
Monza


Joined: 22 Oct 2015
Posts: 154
Location: South Cheshire


PostPosted: Fri Jun 08, 2018 10:16 am    Post subject: Reply with quote

Check your voltage output with engine running, should be 14v ish. If alt failed then remove it and take it to a Starter / Alternator refurb repair shop, they will sort it for a fraction of the prices you have quoted.
 
  
View user's profile Send private message
   
Stoo.c
Monza


Joined: 07 Apr 2014
Posts: 152
Location: Hertfordshire


PostPosted: Fri Jun 08, 2018 10:18 am    Post subject: Reply with quote

Cant go wrong with a Bosch one - seems like a fairly decent price.
_________________
02 996 C4S
93 Skyline R33 GTS-t
91 CRX vtec turbo
01 986 Boxster S
 
  
View user's profile Send private message
   
EGTE
Imola


Joined: 06 Jul 2015
Posts: 778



PostPosted: Fri Jun 08, 2018 10:24 am    Post subject: Reply with quote

DEFINITELY don't go to OPC!

Take it to a car electrical place and it's most likely to be the voltage regulator that's gone.

About £50 (or £80 if they service the alternator) to fix and the "Pelican 101 projects for your 911" site shows you to get alternator out (quite simple).
 
  
View user's profile Send private message
   
eabeukes
Newbie


Joined: 30 Jan 2018
Posts: 48


1999 Porsche 996 Carrera 2

PostPosted: Fri Jun 08, 2018 12:37 pm    Post subject: Reply with quote

Watch out for the small print - those Bosch ones are recon models not brand new!

My indie fitted a brand new Bosch which cost him about that, not sure where he got it from. Fitting was about an hours labour, and he put in a new belt too (£36).
 
  
View user's profile Send private message
   
BK911
Spa-Francorchamps


Joined: 16 Mar 2008
Posts: 320
Location: London

1990 Porsche 964 Carrera 4

PostPosted: Fri Jun 08, 2018 1:13 pm    Post subject: Reply with quote

Thanks guys. All very helpful.

I'll check out the 101 website after work.
_________________
996 C4s
Jim Clark Type 25 Elise SC
Ex - 1990 964 C4
 
  
View user's profile Send private message
   
BK911
Spa-Francorchamps


Joined: 16 Mar 2008
Posts: 320
Location: London

1990 Porsche 964 Carrera 4

PostPosted: Fri Jun 08, 2018 1:15 pm    Post subject: Reply with quote

EGTE wrote:
DEFINITELY don't go to OPC!

Take it to a car electrical place and it's most likely to be the voltage regulator that's gone.

About £50 (or £80 if they service the alternator) to fix and the "Pelican 101 projects for your 911" site shows you to get alternator out (quite simple).


This would be nice. I'll let you know Thumb
_________________
996 C4s
Jim Clark Type 25 Elise SC
Ex - 1990 964 C4
 
  
View user's profile Send private message
   
arry
Hockenheim


Joined: 02 May 2015
Posts: 731
Location: South Essex


PostPosted: Fri Jun 08, 2018 1:42 pm    Post subject: Reply with quote

It will be just the voltage regulator but I changed the whole unit as it was 15 years old anyway and it wasn't loads of money in the grand scheme of things.

Easy enough to do yourself but there are a few pitfalls to avoid. First is, it's fiddly to get back in, so can be a real pain - don't lose your temper Laughing

Secondly, there's a small coolant joiner that bolts up just to the right of it. It's very brittle when old. I snapped mine easily when putting stuff back together. Was a kick in the balls. Only 3 quid for a new one. I'd replace it as matter of course. If you don't want to, to avoid an accident just take the bolt out whilst you're working on it.

Last one is there's a brass (?) Bush that the pinch bolt tightens into and pulls it in tight. It needs a crack sometimes to allow the old alternator to come out. Problem is, people have managed to break the lugs on their alternators and that leaves you with a surcharge you can't reclaim.

Good luck.
_________________
2001 Lapis Blue 996 C2 Manual
2012 Orange KTM 990 SMT
2016 Marsh Grey Royal Enfield Bullet 500
 
  
View user's profile Send private message
   
Guywilko
Newbie


Joined: 04 Jul 2017
Posts: 19



PostPosted: Fri Jun 08, 2018 7:16 pm    Post subject: Reply with quote

My alternator failed three weeks ago. Took it apart and found that the bushes Were worn away to virtually nothing. 100000K mile car. I replaced it with the new regulator from frazerpart for about 50 quid. Moderately easy DIY
Guy
 
  
View user's profile Send private message
   
Ghianightmare
Newbie


Joined: 25 Apr 2017
Posts: 32
Location: Dublin


PostPosted: Fri Jun 08, 2018 7:18 pm    Post subject: Reply with quote

As above - be patient. Buy the little plastic pipe in advance as it will break.

If reinstalling the original alternator, the bushing on the leg at the opposite end to the Pully (the forward one) needs to be pressed back into the leg. As mentioned above it clamps onto the casting in the engine when you tighter the bolt. If you push it back into the leg casting, the alternator will drop back into place. If you don’t, you be lucky to get it back in. Use a spare nut and bolt and a socket to “push” it back in. Don’t try to hammer it as the casing cracks easily. Ask me how I know .....

Recommend to change the aux belt while you are at it.

Give your Airbox, maf and butterfly a clean at the same time as they are exposed.
_________________
2002 Seal Grey C4S
 
  
View user's profile Send private message
   
deMort
Shanghai


Joined: 21 Mar 2015
Posts: 4622
Location: Brighton


PostPosted: Fri Jun 08, 2018 7:29 pm    Post subject: Reply with quote

Ive literally just posted this in the 997 section ..

deMort wrote:

One tip .. hitting the bush in the alternator can snap off the bracket that side .. seen it done .. i tend to pry bar the alternator off then ..

Get a socket thats larger than the steel bush but small enough to support the bracket ..

Someone holds the alternator with the socket on the ground and the bush in it.

Then you can beat it as much as you like without fear of the bracket snapping ( put the bolt in and hit that ) as the socket supports the bracket and the bush can move inside the socket .

Refitting the alternator is much easier if the bush has moved back a bit .

_________________
Mechanic

7pm - 9pm
At an Indy these days !
 
  
View user's profile Send private message
   
BK911
Spa-Francorchamps


Joined: 16 Mar 2008
Posts: 320
Location: London

1990 Porsche 964 Carrera 4

PostPosted: Wed Jun 13, 2018 8:57 pm    Post subject: Reply with quote

Thanks for all the advice guys.

Long story short, sourced a new Bosch alternator. Cost £299 incl vat for the part, plus 2 hours labour. Sorted.
_________________
996 C4s
Jim Clark Type 25 Elise SC
Ex - 1990 964 C4
 



IMG_7684.PNG
 Description:
 Filesize:  1.89 MB
 Viewed:  247 Time(s)

IMG_7684.PNG


  
View user's profile Send private message
   
BK911
Spa-Francorchamps


Joined: 16 Mar 2008
Posts: 320
Location: London

1990 Porsche 964 Carrera 4

PostPosted: Wed Jun 13, 2018 9:01 pm    Post subject: Reply with quote

Ghianightmare wrote:


Recommend to change the aux belt while you are at it.

Give your Airbox, maf and butterfly a clean at the same time as they are exposed.


Thanks for this.👍🏼
_________________
996 C4s
Jim Clark Type 25 Elise SC
Ex - 1990 964 C4
 



IMG_7685.PNG
 Description:
 Filesize:  1.83 MB
 Viewed:  240 Time(s)

IMG_7685.PNG


  
View user's profile Send private message
   
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 12 Hours
Page 1 of 1

 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum