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
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
992 : 2019- 1
991 : 2011- 19
997 : 2004- 76
996 : 1997-2005 35
993 : 1993-1998 7
964 : 1989-1993 2
Carrera 3.2 : 1983-1989 3
Carrera SC : 1977-1983 2
930 Turbo : 1975-1989 1
Early 911 : 1964-1977 1
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 30
Cayman : 2005- 19
Cayenne : 2003- 4
Macan : 2014- 5
Panamera : 2009- 0
912-914-924-928-944-968 2
959 - CarreraGT - RaceCar 0
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 [992] 2018-Current
Porsche 911 [992]
911 [991] 2011-2019
Porsche 911 [991]
911 [997] 2004-2012
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
Gray79
Silverstone


Joined: 28 Apr 2019
Posts: 111
Location: Scarborough


PostPosted: Sun Jun 23, 2019 8:27 am    Post subject: Alternator Fired Reply with quote

Went into the garage this morning to pull out the car, ready for the TIPEC Whitby meet, to be greeted by a funny burning smell. I didn’t think too much of it, I just thought one of the neighbours must be having a garden fire. Started up the car, then alternator failure warning came up on the dash, on a quick inspection I could see where white smoke had come out of the back of the alternator Sad
Out to my workshop with my car lift and tools, quick strip down to find that it had actually been on fire 🔥. Scary considering our bedroom is above my garage, and we have two young children in the house. Anyone know of any faults that could cause this, or will it just be the alternator that has failed? I don’t want to fit a new one to find it might happen again.
_________________
997.1 Carrera 2S

Last edited by Gray79 on Sun Jun 23, 2019 8:41 am; edited 1 time in total
 
  
View user's profile Send private message
   
Gray79
Silverstone


Joined: 28 Apr 2019
Posts: 111
Location: Scarborough


PostPosted: Sun Jun 23, 2019 8:40 am    Post subject: Reply with quote

Photos
_________________
997.1 Carrera 2S
 



64252028-01F6-457E-B37B-1AD1A1D8FB21.jpeg
 Description:
 Filesize:  1.45 MB
 Viewed:  1452 Time(s)

64252028-01F6-457E-B37B-1AD1A1D8FB21.jpeg



C1CF117F-D281-4AC1-B9FB-A55B95BFB09E.jpeg
 Description:
 Filesize:  1.44 MB
 Viewed:  1452 Time(s)

C1CF117F-D281-4AC1-B9FB-A55B95BFB09E.jpeg



DBC5548E-42D0-436F-8238-E69B8ADEE01D.jpeg
 Description:
 Filesize:  1.65 MB
 Viewed:  1452 Time(s)

DBC5548E-42D0-436F-8238-E69B8ADEE01D.jpeg



AF82440A-27AD-4EC4-8F3A-401D975B76E6.jpeg
 Description:
 Filesize:  1.44 MB
 Viewed:  1452 Time(s)

AF82440A-27AD-4EC4-8F3A-401D975B76E6.jpeg


  
View user's profile Send private message
   
Gray79
Silverstone


Joined: 28 Apr 2019
Posts: 111
Location: Scarborough


PostPosted: Sun Jun 23, 2019 9:15 am    Post subject: Reply with quote

Anyone had any experience with these, seems too cheap?

https://www.ebay.co.uk/itm/PORSCHE-911-996-997-3-4-3-6-3-8-BRAND-NEW-150A-ALTERNATOR-1997-2008/303112825006?fits=Car+Make%3APorsche%7CPlat_Gen%3A997&hash=item4692eea8ae:g:jRAAAOSw9N1VqiK5
_________________
997.1 Carrera 2S
 
  
View user's profile Send private message
   
carcrazypop
Trainee


Joined: 10 Aug 2011
Posts: 84
Location: North Staffs.


PostPosted: Sun Jun 23, 2019 9:19 am    Post subject: Reply with quote

Hi, I recently purchased a late 2005 997 C2S and when trawling through the old invoices, I noticed that it had a new alternator fitted a few years back, and at the same time, the power cable from the front/battery area of the car to the rear of the car was replaced due to showing a very high resistance. I think that the failure of the cable can lead to damage to the alternator and starter motor ?? probably worth getting the cable checked, don't know if this might have led to the alternator fire though.

I'm certainly no expert, but thought my observations might be relevant.
Good luck.
 
  
View user's profile Send private message Send e-mail
   
NLW73
Albert Park


Joined: 27 May 2014
Posts: 1524
Location: Yateley


PostPosted: Sun Jun 23, 2019 10:12 am    Post subject: Reply with quote

Gray79 wrote:
Anyone had any experience with these, seems too cheap?

https://www.ebay.co.uk/itm/PORSCHE-911-996-997-3-4-3-6-3-8-BRAND-NEW-150A-ALTERNATOR-1997-2008/303112825006?fits=Car+Make%3APorsche%7CPlat_Gen%3A997&hash=item4692eea8ae:g:jRAAAOSw9N1VqiK5


DO NOT GO WITH THIS OUTFIT. they do not refurb the parts properly and seem to put a lick of paint over them!!

sent me the wrong item first and then the item that did turn up was 5hit and had to go back.

I ended up getting the item from CarParts4less and the bosch item.

at least you know its right and will last. you get a warranty too.

if you are handy with spanners then go for the Bosch item.

not worth doing any other route. trust me I tried it.

that is defo fubarred. sometimes Euro car parts will do an exchange on the item. happened to me on my 997s. put the ignition on and smoke came out the bag and the alternator just fried itself. perfect!!
_________________
997 C2s Schwarz
 
  
View user's profile Send private message
   
NLW73
Albert Park


Joined: 27 May 2014
Posts: 1524
Location: Yateley


PostPosted: Sun Jun 23, 2019 10:16 am    Post subject: Reply with quote

https://www.carparts4less.co.uk/cp4l/c/Porsche_911_3.8_2005/p/car-parts/electrical/car-electrics-and-car-lighting/alternator/?401330220&1&906ff5dfcedfc3b510fd20c8e20cf6aa6bfe669a&000012

recon one

put in the code WEEKEND17 and you get some more off.
_________________
997 C2s Schwarz
 
  
View user's profile Send private message
   
Gray79
Silverstone


Joined: 28 Apr 2019
Posts: 111
Location: Scarborough


PostPosted: Sun Jun 23, 2019 10:22 am    Post subject: Reply with quote

*****, just ordered one from them, if it’s no good I’ll send it back.
_________________
997.1 Carrera 2S
 
  
View user's profile Send private message
   
Luddite
Nürburgring


Joined: 18 Dec 2018
Posts: 457
Location: Scotland


PostPosted: Sun Jun 23, 2019 12:22 pm    Post subject: Reply with quote

Gray79, you have raised an issue that is of concern indeed, not only relative to the possibility of loosing a Porsche to fire damage but for much worse.

First off, I have been messing with vehicles for over 50 years and to date have not had one of my own suffer an alternator sourced fire. Secondly I kinda hope that building regs require integral garages to have a degree of fire retardation measures built into them during construction such as fire "resistant" doors and perhaps similar ceiling and wall materials utilised to slow down the progress of any fire.... though in a certain high rise tower.... modification to ORIGINAL.... construction seems to have lacked a degree of monitoring to determine materials suitability..?

Filling integral garages with all sorts of flammable items has it`s risks too, and to offset those to some degree it seems best to fit a smoke detector or a heat detector or both...today it is possible to have relative cheaply available interconnected detectors, that all sound together if any one unit detects an issue, thus if for any reason it may be possible that the detector in the garage might be inaudible due to it`s location, then the kitchen and/or stairway/hallway detector will also sound. These days interconnected detectors can be BOTH mains electricity and internal battery supplied to minimise voltage loss during power outages..

Of course having a smoke detector in a garage where exhaust fumes are expected has potential to create false alarms, however perhaps less so if the car is parked face in and avoiding ANY start up`s with the garage door closed.

A heat detector as might be used in a kitchen seems a better option though perhaps the slower response time is a consideration, but then location choices can make a difference...i.e. in a Porsche garage, mounted directly above the engine bay vents..?

As for the vehicle in question I have no idea as to whether the alternator is fused, well worth checking..? If fused my hope would be that the fuse is rated/ sized in amps relative to the maximum expected loading which can work both ways... relative to the internals of the alternator shorting out causing it to burn internally, in which case the battery would be adding fuel to the potential fire until the fuse blows protecting the wiring causing the fire to spread to other areas within the vehicle.... AND to protect the alternator it`s self from overloading relative to the battery and electrical system should a short circuit develop within un-fused circuitry in the wiring system other than within the alternator ...?

Just thinking in type.. Happy to be corrected.. Question
 
  
View user's profile Send private message
   
Gray79
Silverstone


Joined: 28 Apr 2019
Posts: 111
Location: Scarborough


PostPosted: Sun Jun 23, 2019 3:53 pm    Post subject: Reply with quote

When I had the house built (barn conversion) if I remember correctly, the garage ceiling was made up of a double layer of fire retardant plaster board that is supposed to be 14 minute protection, and also it has a fire door leading into the house. Still it is worrying that I could have lost my car, house and potentially much worse due to an alternator failure.
_________________
997.1 Carrera 2S
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7267
Location: Brighton


PostPosted: Mon Jun 24, 2019 7:04 pm    Post subject: Reply with quote

I'll just point out .. this is very rare indeed ... potentially into lottery winning numbers here ..

The problem is it's a huge cable direct from the battery .. there is no fuse ..

water , and i mean rather a lot on the alternator could .. just about i guess cause this .. i've not seen it though .

I have once in 15 years seen this .. erm .. the lead on the alternator had been fitted in the wrong slot .. there are two but use the wrong one and it just about shorts out ... so this was mechanical error and all it did was smoke a bit .

This seems to be some sort of regulator fault .

It is somewhat surprising what damage a 12 volt battery can actually do .. but it's not the voltage .. it's the amps stored within so to speak .
_________________
.

My Daughter's Crowdfunding has hit the target see Here

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
View user's profile Send private message
   
Gray79
Silverstone


Joined: 28 Apr 2019
Posts: 111
Location: Scarborough


PostPosted: Mon Jun 24, 2019 7:50 pm    Post subject: Reply with quote

deMort wrote:
I'll just point out .. this is very rare indeed ... potentially into lottery winning numbers here ..

The problem is it's a huge cable direct from the battery .. there is no fuse ..

water , and i mean rather a lot on the alternator could .. just about i guess cause this .. i've not seen it though .

I have once in 15 years seen this .. erm .. the lead on the alternator had been fitted in the wrong slot .. there are two but use the wrong one and it just about shorts out ... so this was mechanical error and all it did was smoke a bit .

This seems to be some sort of regulator fault .

It is somewhat surprising what damage a 12 volt battery can actually do .. but it's not the voltage .. it's the amps stored within so to speak .


That’s just my kind of luck, I’m not likely to win the lottery nooo

I didn’t have any water on it, I never wash engine bays on cars, as I know the problems it can cause.

I don’t expect any car of this age to be 100% reliable, but this Porsche is trying my patience, my old TVR was more reliable frustrated
_________________
997.1 Carrera 2S
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7267
Location: Brighton


PostPosted: Mon Jun 24, 2019 7:55 pm    Post subject: Reply with quote

I'm afraid i can only say this is a very rare fault .. 15 years in so far and i've not seen nor heard of a spontaneous combust like this .

Does Not help you i realise and will knock your confidence in the car which i fully understand .. luck .. sometimes it sucks i guess .

Sorry .
_________________
.

My Daughter's Crowdfunding has hit the target see Here

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
View user's profile Send private message
   
brownspeed
Spa-Francorchamps


Joined: 09 Jun 2016
Posts: 252
Location: Gods favourite city-Manchester


PostPosted: Tue Jun 25, 2019 8:31 am    Post subject: Reply with quote

OP: are you sure it was actually on fire?. Mine let go in a similar fashion as I was pulling off the drive. No symptoms or anything before the warning light appeared flowedby a horrid stench. Mine was the original fitted unit and the diode pack let go and melted the commutator and shaft. Did not find any cable issues and all seems well🤞
_________________
2004 997.1 C2S (Hartech rebuilt)
2002 TVR Tamora 3.6
1990 Mini Cooper RSP

Abarth 595
 
  
View user's profile Send private message
   
Gray79
Silverstone


Joined: 28 Apr 2019
Posts: 111
Location: Scarborough


PostPosted: Tue Jun 25, 2019 8:05 pm    Post subject: Reply with quote

brownspeed wrote:
OP: are you sure it was actually on fire?. Mine let go in a similar fashion as I was pulling off the drive. No symptoms or anything before the warning light appeared flowedby a horrid stench. Mine was the original fitted unit and the diode pack let go and melted the commutator and shaft. Did not find any cable issues and all seems well🤞


Yes definitely on fire, happened overnight whilst the car was switched off, there was burn marks on the alloy casting above the alternator, smoke stains all over the rear window and the plastic cover on the rear of the alternator was completely burnt off, I had to scrape the melted plastic off the engine under the alternator.
Haven’t found any cable issues either.
_________________
997.1 Carrera 2S
 
  
View user's profile Send private message
   
Gray79
Silverstone


Joined: 28 Apr 2019
Posts: 111
Location: Scarborough


PostPosted: Tue Jun 25, 2019 8:11 pm    Post subject: Reply with quote

NLW73 wrote:
Gray79 wrote:
Anyone had any experience with these, seems too cheap?

https://www.ebay.co.uk/itm/PORSCHE-911-996-997-3-4-3-6-3-8-BRAND-NEW-150A-ALTERNATOR-1997-2008/303112825006?fits=Car+Make%3APorsche%7CPlat_Gen%3A997&hash=item4692eea8ae:g:jRAAAOSw9N1VqiK5


DO NOT GO WITH THIS OUTFIT. they do not refurb the parts properly and seem to put a lick of paint over them!!

sent me the wrong item first and then the item that did turn up was 5hit and had to go back.

I ended up getting the item from CarParts4less and the bosch item.

at least you know its right and will last. you get a warranty too.

if you are handy with spanners then go for the Bosch item.

not worth doing any other route. trust me I tried it.

that is defo fubarred. sometimes Euro car parts will do an exchange on the item. happened to me on my 997s. put the ignition on and smoke came out the bag and the alternator just fried itself. perfect!!


Well it arrived today, so far so good. Looked identical, and brand new as advertised. Bolted in place and it worked straight away. Only time will tell, but £138.95 is better than £380 I got quoted for a new Bosch unit.
Fingers crossed it lasts.
_________________
997.1 Carrera 2S
 
  
View user's profile Send private message
   
Gray79
Silverstone


Joined: 28 Apr 2019
Posts: 111
Location: Scarborough


PostPosted: Tue Jun 25, 2019 8:16 pm    Post subject: Reply with quote

deMort wrote:
I'm afraid i can only say this is a very rare fault .. 15 years in so far and i've not seen nor heard of a spontaneous combust like this .

Does Not help you i realise and will knock your confidence in the car which i fully understand .. luck .. sometimes it sucks i guess .

Sorry .


No need to be sorry, it’s not your fault, I just hope this is the last issue for a while frustrated
_________________
997.1 Carrera 2S
 
  
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