4.0 V6 alternator

[Disco-tastic]

Hi all.

Does the 4.0 petrol v6 alternator have the same issues as the diesel? As in, I'd the alternator dies, does it completely drain the battery?

Car wouldn't start this morning. No warning, no slow starts. Just nothing but the tick of the relay when you try and start. All the dash lamps worked, the stereo worked, just wouldn't crank.

I jump started it (properly) and it idled fine for 15mins. Turned it off and when i came back no go.

I bought a new battery, and the guy at battery world measured 10.5v on the old battery. It was also bulging a little so i figured it was time for a new one anyway, but im a little stumped as to why it drained so low overnight.

Cheers

Dan

[AnD3rew]

If the alternator has gone in the same way the D3, it pretty much kills the battery within minutes, if you put an new battery in it would kill that one too.

[Disco-tastic]

Thanks Andrew.

Thats what im worried about. Are you confirming that its the same alternator and therefore has the same problem? If thats the case, do you know where i can find the thread on the mega fuse mod to stop it happening?

Cheers

Dan

[AnD3rew]

No, I don't know, if it is the same.

If you use the search tool in the bottom left of the screen, the Google aulro search, you should be able to find the fuse thread. But here are a varying opinions about whether it will work.

[drivesafe]

Hi Dan, you most likely have nothing wrong with your alternator.

Your problem is that your ( 6 cell ) 12v battery is now a ( 5 cell ) 10.5v battery.

Your battery has dropped a cell and this is not because of any mystery overnight drain, it is an almost instantaneous failure.

The guy at Battery World should have told you your battery has dropped a cell.

[drivesafe]

Hi again Dan and if your alternator was the problem, your battery would be down to 7v but would be rechargeable.

At 10.5v, it's a dropped cell and the battery is no longer usable.

[LandyAndy]

Hi Dan, you most likely have nothing wrong with your alternator.

Your problem is that your ( 6 cell ) 12v battery is now a ( 5 cell ) 10.5v battery.

Your battery has dropped a cell and this is not because of any mystery overnight drain, it is an almost instantaneous failure.

The guy at Battery World should have told you your battery has dropped a cell.

The bulging battery would also indicate what Tim is saying.Likely to be a short in that cell causing the bulge.Seen lots of it on earthmoving gear,especially if cheap batteries have been installed.
Do Batteryworld use the same employment agency as Supercheap???
Andrew

[drivesafe]

Do Batteryworld use the same employment agency as Supercheap???
Andrew

Very funny but o so true :twisted:

[Disco-tastic]

Do Batteryworld use the same employment agency as Supercheap???
Andrew

Haha the guy was actually really good! Way better than supercheap!

He didnt commit to any diagnosis but did say it had likely dropped a cell, though it would take him until Monday to try and charge it then test.

Thanks Tim and Andy's. I dont know much about batteries and have a basic understanding of electronics. I did figure the alternator was ok as the car ran on a dud battery. Didnt know a battery could drop a cell overnight tho!

Im still a bit concerned about the alternator going south and taking the battery with it. I will have a look at part numbers (if i can find them) but if anyone else knows feel free to comment :p

Cheers

Dan

[Nomad9]

Hi Dan,
I have had three people drop cells this week at work, came into work fine in the morning, lights on etc, come to go home, nothing flat as a fluke. Could well be temperature related......it is summer well at least for another two days.

Cheers Marty.

[LandyAndy]

ONLY 2 DAYS LEFT:cool::cool::cool::cool::cool::cool::cool:
Im over summer bigtime.Nothing left of my garden,had way too many extreme temp days.
1 Powerball and Im emigrating to Albania:):):):):)
Andrew

[Disco-tastic]

Resurrecting this at it appears my alternator may have gone - Does anyone know the differences between the diesel and petrol alternators?
from pictures it looks like it's just the connector plug and earth terminal location?

I'm not intending to use a diesel one, just wondering if they use the same internals to see if i can get mine fixed.

Cheers

Dan

TDV6
https://i.ebayimg.com/images/g/hmEAAOSwNuxXbTPr/s-l300.jpg

4.0 Petrol
https://www.lrdirect.com/images/T/YLE500410.jpg

[justinc]

Different alternator internally too, and belt pulley.

[Disco-tastic]

Different alternator internally too, and belt pulley.

Thanks Justin. Does it still suffer from similar diode failures? I am trying to find a new rectifier for it but cannot find a part number, and don't have the time to pull my alternator out at present. Mine is still holding in there,at least when the car is on.

[justinc]

Yes, had a " smoker" and groaning with gusto a week ago. Same issues at similar km to the tdv6 unfortunately. I would suggest the same remedy, buy a new Denso one. There are still issues with finding the correct rectifier, and most also suffer from winding shorts, too.

[Pinelli]

I fitted a new regulator to my V8 petrol alternator last year. $50 from the US via ebay plus postage. Just replaced the whole alternator this week though anyway as it failed again, although this time I suspect the brushes. This time I had to get the car back on the road, which wasn't as urgent last year. You can buy a matching pair of regulator & brushes . ALTERNATOR Regulator Brush Holder Fits LAND ROVER LR3 4.0L V6 2005-2008 | eBay (https://www.ebay.com.au/itm/ALTERNATOR-Regulator-Brush-Holder-Fits-LAND-ROVER-LR3-4-0L-V6-2005-2008/271528776413?_trkparms=aid%3D111001%26algo%3DREC.S EED%26ao%3D1%26asc%3D20160908105057%26meid%3D57626 9284bcd47b8ad9d93a7b651f25d%26pid%3D100675%26rk%3D 2%26rkt%3D15%26sd%3D173418198171%26itm%3D271528776 413&_trksid=p2481888.c100675.m4236&_trkparms=pageci%3A3c469656-89dc-11e9-8068-74dbd180348e%7Cparentrq%3A36bca3c016b0a4b77cc962de fff2c29b%7Ciid%3A1)

[Disco-tastic]

Yes, had a " smoker" and groaning with gusto a week ago. Same issues at similar km to the tdv6 unfortunately. I would suggest the same remedy, buy a new Denso one. There are still issues with finding the correct rectifier, and most also suffer from winding shorts, too.Hey Justin, any tips for fixing a broken 3 pin plug to the alternator? I managed to snap the retaining clip off mine and cant see an obvious way of keeping it on there. I couldnt spot any good places to fix a zip tie...

[Pinelli]

The plug actually is part of the rectifier, not the body of the alternator. You could replace the regulator. Search for "lr3 alternator regulator" on ebay and you'll see what I mean.

[DiscoJeffster]

You could put a small amount of silicone on the outer of the plug. Just enough to keep it in place but not enough you’ll never get it out again.