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Alternator Replacement Guide
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twoakers
 


Member Since: 15 Nov 2010
Location: Harwich
Posts: 367

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

Did mine today after red light came on 2 days ago Shocked
Guess it was on it's way out 'cos on short journeys battery was not keeping up...
Used my Kamasa ratshit spanners to get the old one off no problems.
Great guide and piccies Bow down
Many thanks
Dave
 Cheers, Dave in Essex
D3 07 TDV6 HSE
Clubs - Turbo changed, EGR valves replaced, General Grabber ATs, Hawkeye FC reader, Front/rear wishbones, manual gearbox change, autobox flush, cam belt change, HPFP belt change, oil pump change....
Coachman Laser 650/4 caravan
Amateur Radio Callsign - G8PAI
Playing with Big Boys Toys! 
 
Post #120251514th Dec 2013 7:22 pm
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filo
 


Member Since: 09 Jul 2010
Location: here, down in the north, where the fog is
Posts: 615

Italy 2007 Discovery 3 TDV6 XS Auto Zermatt SilverDiscovery 3

excellent guide
I eventually bought the viscous fan holding tool and the VF hub tool for a few quid remembering the pita while undoing the viscous fan during cam belt replacement

thanks again methley Thumbs Up
F.

EDIT: replaced the alternator late this afternoon. Defo 1 hour quite easy job even if those two lower bolts are a bit tricky.
I found easier going underneath to undo the lower bolts.
A ratchet spanner is definately essential as all the three bolt threads are long.
for those tool addicted as I am I used this tool to lever the tensioner. This is the square tool I use to undo differential plugs.

  
Post #133844811th Sep 2014 11:05 am
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G65W
 


Member Since: 22 Jan 2013
Location: United Kingdom
Posts: 44

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Manual Bonatti GreyDiscovery 3
Alternator Replaced but I still have the siren noise

Fantastic write up Methley and everyone else who contributed! Bow down Bow down I did mine this morning and it took me 2 hours, and I am a real novice. The hardest part of me was getting the belt back on after I had fitted the alternator.

I hope you don't mind, but I wanted a copy to print off so I created this document so I could refer to it when I was doing the work:

https://drive.google.com/file/d/0B9i9jlh9W...sp=sharing

I hope it helps those beginners like me who need to see the pictures as I could only print off the text from the site!! Embarassed

I recently bought a re-manufactured turbo and had it fitted by an Indy in Reading for a very reasonable price. However they said there was now a slight whine/siren noise coming from the engine and was it there before - which it wasn't. They said it might be an unbalanced vanes in the Turbo making the noise or it could be the alternator, hence my reason for changing the alternator this morning after reading many of the siren/whine noise posts on this brilliant site.

HOWEVER the noise is still there?!! Big Cry Big Cry If it is a noise coming form the Turbo is that something to worry about. I've heard that some of them whine anyway? There is no loss of power and the noise tends to disappear when the engine is warmer. Any other help would be much appreciated! Bow down
  
Post #13524514th Oct 2014 2:11 pm
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methley
a.k.a. Big Hairy Ski Monster 


Member Since: 07 Oct 2008
Location: Marshfield, South Glos
Posts: 2433

England 2006 Discovery 3 TDV6 SE Manual Java BlackDiscovery 3

Does the noise disappear when you turn off your air-con?
 Andy

Fridge Slide for sale https://www.disco3.co.uk/forum/post2064622.html#2064622 
 
Post #13524534th Oct 2014 2:14 pm
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G65W
 


Member Since: 22 Jan 2013
Location: United Kingdom
Posts: 44

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Manual Bonatti GreyDiscovery 3

I've just checked it and no it does not make any difference at all if you turn the air con off?
  
Post #13524934th Oct 2014 4:43 pm
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methley
a.k.a. Big Hairy Ski Monster 


Member Since: 07 Oct 2008
Location: Marshfield, South Glos
Posts: 2433

England 2006 Discovery 3 TDV6 SE Manual Java BlackDiscovery 3

OK. Thought it could have been a whining air-con compressor bearing.
 Andy

Fridge Slide for sale https://www.disco3.co.uk/forum/post2064622.html#2064622 
 
Post #13531976th Oct 2014 11:07 am
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crwoody
 


Member Since: 09 Mar 2009
Location: Littleborough
Posts: 2109

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

One of the aux belt idler pulley bearings getting a bit worn perhaps?

I had to replace the tensioner when I did my alternator.
 Clive

 
 
Post #13532026th Oct 2014 11:15 am
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G65W
 


Member Since: 22 Jan 2013
Location: United Kingdom
Posts: 44

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Manual Bonatti GreyDiscovery 3

Thanks for the reply crwoody - how would I know if pulley bearings were worn?
  
Post #13544838th Oct 2014 7:07 pm
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G65W
 


Member Since: 22 Jan 2013
Location: United Kingdom
Posts: 44

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Manual Bonatti GreyDiscovery 3

Methley - I have recently had a new Air Con Compressor fitted by an Indy - so presumably this should mean the bearing is OK?
  
Post #13544858th Oct 2014 7:10 pm
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crwoody
 


Member Since: 09 Mar 2009
Location: Littleborough
Posts: 2109

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

G65W wrote:
Thanks for the reply crwoody - how would I know if pulley bearings were worn?


The best way I've found is to remove the belt and give the pulleys a spin by hand, also grab them and give a wobble by hand too, to see if there's any noise or undue movement.
 Clive

 
 
Post #13545088th Oct 2014 7:26 pm
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kjh1957
 


Member Since: 05 Nov 2005
Location: Northamptonshire
Posts: 44

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

As others, many thanks for posting this excellent guide. All done in an hour and a quarter (1/4 hour of which looking for the right tools😜) 13mm ratchet spanner from Aldi really came into its own with the bottom alternator bolts. Thanks again!
  
Post #135584811th Oct 2014 9:19 am
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Barn1e
D3 Decade 


Member Since: 28 Aug 2006
Location: Mid-sussex
Posts: 2009

United Kingdom 2005 Discovery 3 TDV6 S Auto Tonga GreenDiscovery 3

Thanks Methley and others. Just changed my alternator in 60 minutes. Glad I bought some flexible ratchet spanners a while back. Only problem I had was the electrics plug - it was hard to get a nice tight fit. In the end a wide set of grips squeezed it in enough for the clip to engage.
 2005, TDV6 S, Auto, 190k miles, owned from new, V8 Brake Upgrade, Nancom Evo, RLD protector, BAS EGR blanking & Remap, separate ATF cooler, changing all the fluids ahead of time.  
Post #13671641st Nov 2014 11:37 am
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Johnny Oxford
 


Member Since: 14 Dec 2014
Location: Chinnor
Posts: 446

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

I did this job today and used this thread as my guide, and very useful it was too, thank you very much all.

One tip which I have not seen elsewhere is to use a 3/8" socket wrench (or 1/2" with 3/8" adaptor) to loosen the belt tensioner - makes it much easier than the screwdriver method, and safer. It is still tricky to pull the belt on, but I managed it after a couple of attempts.

Thanks again all.

Is there any market for the duff alternators on ebay? I suppose someone must buy them in order to refurbish and re-sell?

Great forum. Thanks.
  
Post #139417622nd Dec 2014 9:35 pm
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17926

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

Quote:
One tip which I have not seen
...on the first page...
Quote:
is to use a 3/8" socket wrench


Laughing
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Post #139418422nd Dec 2014 9:49 pm
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galwaygreen
 


Member Since: 30 Oct 2011
Location: plymouth
Posts: 5471

United Kingdom 2016 Discovery 4 3.0 TDV6 Graphite LE Auto Loire BlueDiscovery 4

just a point please...can you just reconnect the battery and away or is there a reset thing to do...
have no intension of putting a spanner near our newish d4.....happy at my age to let the stealer do it all.peace if mind I guess
  
Post #139424922nd Dec 2014 10:40 pm
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