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Alternator Replacement Guide
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JMack
 


Member Since: 02 Aug 2014
Location: Edinburgh
Posts: 1448

Scotland 2006 Discovery 3 TDV6 Commercial Manual Java BlackDiscovery 3

SteveH wrote:
AA read 11.19 just after battery fitted.


11.19 is about 10% charge, i.e very nearly totally flat.

Surprised it started the car at that voltage. Fully charged should be 12.6v.
  
Post #161696527th Feb 2016 10:30 am
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kona_221
 


Member Since: 24 Oct 2013
Location: Cambridgeshire
Posts: 98

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Great write up, used it this morning. Having a 13mm ratchet spanner made it so much easier!
 54 D3 TDV6 AUTO HSE - Oct13 > Present
EGR Blank'd, Geoff's Trans Flush, RLD Sump Guard & Wheel Protector, Clear Side Repeaters, De-Tango'd, Beanie Grill, Colour Coded Arches & Tailgate, D4 Rear Lights, Traxide Split Charge, Yellow Top Aux Battery

51 Defender TD5 110 Country - Oct09 > Nov13 
 
Post #161711027th Feb 2016 4:24 pm
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SteveH
 


Member Since: 10 Aug 2013
Location: Northampton
Posts: 62

England 2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Bit the bullet and new density alternator arrives Tuesday from advanced factors. Good price £205 all up with delivery and 5% forum discount. Pretty good when dealer quoting 440 + vat !

Am i ok to re connect battery ? I have the fan disconnected. I want to get into boot to remove rear bumper and check rear sensors while I wait for alternator
  
Post #161754628th Feb 2016 1:09 pm
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SteveH
 


Member Since: 10 Aug 2013
Location: Northampton
Posts: 62

England 2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

'Denso' alternator (bloody predictive text!)
  
Post #16190882nd Mar 2016 10:15 am
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the admiral
 


Member Since: 19 Oct 2015
Location: South east ,swale
Posts: 170

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

Martin wrote:
Or the slinky Halfords ones:

Click image to enlarge



just looked at these on halfords, flexi head ones are currently half price £40 Very Happy
 D3 HSE 57 Buckingham Blue
box re-build
new TC

common sense is not common 
 
Post #16191002nd Mar 2016 10:54 am
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Newks
 


Member Since: 31 Jan 2015
Location: Kinloss
Posts: 69

Scotland 2007 Discovery 3 TDV6 XS Manual Indus SilverDiscovery 3

Great guide, helped me out today only thing I found was it was easier to get to the lower alternator bolts by removing the small cover that's in front of the drivers wheel
  
Post #16207415th Mar 2016 6:04 pm
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Baldrick
 


Member Since: 15 Aug 2006
Location: Dublin
Posts: 76

Ireland 2007 Discovery 3 TDV6 S Auto Zambezi SilverDiscovery 3

Did this today due to alternator frying itself yesterday and shorting everything out. The hardest part is getting the fan off with out proper tool to hold the hub. I bought the 36 mil fan spanner in Halfords, but had to buy a shelf bracket from b &q which I butchered to make a hub holding tool. It's bank holiday Saturday and it was the only place I could buy anything resembling metal bar.

Note that I drilled 2 holes to bolt on with the hub bolts and cut out he slot to go around he fan nut, but found i didn't make it quite right on the first attempt, so I was about to "adjust" it wihen I realised I could just use one bolt to hold it and lean it against the second bolt to hold the hub. Worked a treat.

Thanks for the guide


 2007 MY Irish spec S+ TDV6  
Post #164845630th Apr 2016 5:57 pm
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Jarvis
 


Member Since: 16 Dec 2009
Location: West Berkshire
Posts: 272

England 

Again, excellent guide on the forum Bow down Bow down Bow down

Diagnosed 8:30am Wednesday morning (Vbat low even when engine revved), ordered replacement from Steve @ AF 9:00am and removed old one in the evening (30mins). Replacement arrived 8:30 this morning and <40 minutes to having the car running again without battery light Whistle Whistle

I used 3/8 ratchet+13mm socket for the alternator bolts and open ended 13mm spanner for the electrical terminal so ratchet spanners are not necessary. As I'd done cam belts earlier this year, I had the fan spanner and tool to hold it in stock. I would definitely recommend spending the few quid on them rather using hammers etc.

And to cap it all, the sun is out Thumbs Up Thumbs Up
  
Post #165376612th May 2016 11:18 am
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Andy Foster
 


Member Since: 27 Dec 2009
Location: Liverpool
Posts: 6360

United Kingdom 2015 Discovery 4 3.0 SDV6 SE Tech Auto Santorini BlackDiscovery 4

Great write up Bow down Thumbs Up

Will be using this info this week due to my alternator looking like this at the minute Big Cry


 D4 MY15 SE TECH
D3 gone but never forgotten. 
 
Post #165615617th May 2016 8:24 pm
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Andy Foster
 


Member Since: 27 Dec 2009
Location: Liverpool
Posts: 6360

United Kingdom 2015 Discovery 4 3.0 SDV6 SE Tech Auto Santorini BlackDiscovery 4

Alternator out and the bottom bolts have sheared. Nothing to get hold of so I'll need to drill them out. Am I right in thinking there is a bracket I can take off to get at these bolts.


 D4 MY15 SE TECH
D3 gone but never forgotten. 
 
Post #165670018th May 2016 9:31 pm
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Mikeyb
 


Member Since: 08 Nov 2016
Location: Maldon, Essex
Posts: 478

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Massive thanks to Methley for taking the trouble to post this guide. Having had the dreaded battery light come on just 3 days into my first Disco ownership, with funds a bit tight, I was dreading putting the car into the local Indie.

Following the guide, I'm pleased to say that everything came apart as it should, with the whole job only taking a couple of hours - and that included a trip to the local Motor Factor to pick up a new Denso!

All in all saved me a quoted £150 labour charge Smile

Just one point I learned - it was easy to trap the red boot that shrouds the main +ve terminal as I tightened the nut up. Just as well I checked carefully with a torch hence was able to rectify.

Hope that I've done the fan back up tight enough!
  
Post #173787222nd Nov 2016 2:43 pm
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craigside
 


Member Since: 10 Mar 2011
Location: Bolton
Posts: 27

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

Thank you for posting this excellent guide which has enabled me to replace mine today after my red warning light appeared yesterday...

I found a discount code for EuroParts so price was £251 Incl. which is about £20 more than the online supplier mentioned earlier, however it allowed me to do it whilst it's not raining and get back on the road quickly.

I had some difficulty freeing the fan nut. After a few attempts I had a 10mm ring spanner as a brace as shown above. I warmed the nut using a heat gun, which might have helped and used my hammer handle to push down hard on the other end of this spanner whilst I gave the big adjustable a good whack with a hammer.

I also used my hammer handle to push the tensioner whilst I removed the belt.

Thanks again! if I hadn't checked on this forum this morning I would have driven around today and probably destroyed my quite new expensive battery Smile
 '65 Reliant Regal, '69 Imp, Fiat Amigo 600cc Camper, Triumph GT6 Mk1, MG Midget, Escort Van, Triumph Spitfire 1.5 Mk3, Escort Mk3, Bluebird 2.0, Bluebird 1.8 Turbo, Supra 3L Turbo, Previa (kids arrived!), CLK 320, CLK 500, A4 3.0 Cab.
Since 02/11 - '06 D3 HSE Zermatt Silver | Egr blanked | 
 
Post #174927815th Dec 2016 4:06 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

I glad the guide continues to help people! Thumbs Up
 Andy

Fridge Slide for sale https://www.disco3.co.uk/forum/post2064622.html#2064622 
 
Post #174927915th Dec 2016 4:10 pm
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Nickbys
 


Member Since: 04 Jan 2017
Location: Kent
Posts: 24

United Kingdom 2006 Discovery 3 TDV6 S Auto Santorini BlackDiscovery 3

Great post, made the change over idiot proof.
The fan didn't wanna play ball but a long 1/4" extension soon sorted that (pics below)
thanks Thumbs Up
obv need to look out for your knuckles if the bar slips!


  
Post #176338014th Jan 2017 8:25 pm
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PerthDisco
 


Member Since: 21 Jun 2010
Location: Perth
Posts: 72

Australia 2008 Discovery 3 TDV6 SE Auto Zambezi SilverDiscovery 3

Job done thanks to this fantastic post.

1.5 hours.

My takeaways;

Nothing is ever seized on Australian cars like UK cars!
The last technique of an extension bar to brace the waterpump works a treat.
Can do the job without a ratchet spanner to remove the lower bolts (just slow).
Can just fit a 13mm socket in to tighten up the lower bolts holding the ratchet head with the other hand.
Getting it out is actually a tight squeeze to push past the hoses.
The top nut on the +ve wire is a real Censored to get located and started without dropping it. Could not get the rubber boot to p-off out of the way. Took me a while to realise how the cable seats into the alternator.

Thanks
  
Post #179643727th Mar 2017 11:42 am
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