Thread: 2.7 TDV6 Alternator Issues

New alternator now installed and after a couple of starts all faults have gone.

Process is not as simple as the Disco3 UK site indicated - basic process was spot on but did miss a couple of little minor issues - like once the bolts are removed how to get the alternator out and the new one in - I have probably stressed the little rubber coolant hose that runs by the alternator getting it out so will be keeping a close watch for coolant leaks.

Clearly an operational alternator needs to be in the system to stop cascading faults caused by communication errors - this is despite a fully charged battery in the system = yes the engine will sort of run and the gearbox will sort of work but even when battery voltage is 12.8 v, if the alternator is not working you get more than just a battery light.

The old alternator did not have any burnt smell so windings should be Ok and probably just a rectifier failure - I might see if I can get a repair kit and see what happens.

Thanks - for all the input - much appreciated.

Garry

It might just need new brushes but if the diodes haven't failed then best to replace them (the diodes) anyway.

Ashdown Ingram sell them.

Further to my remark. I bought a new alternator from Ashdown Ingram, just needed to swap the pulley from mine with a rattle gun. It is a D3 2.7 and has been driven around Australia without further issue. Cost was substantially less than anywhere else.

The ones that Ashdown Ingram (and many other companies) sell are Denso knock-offs (OEX Brand) not Denso Brand (made in Taiwan rather than Japan) - mine came with the correct pulley.

Glad to hear yours is running OK as I had a concern the quality might not be up to what was required.

Cheers

Garry

I have had issues with field pickups not making continuous contact at high revs but work at lower revs it may be worth checking
Cheers
Des

Hi all,
Does anyone have the part number for the rectifier kit for these? Or a reference guide as I am looking for a kit for a D4 2.7 alternator kit and seem to be hard to find.
I currently have an OEX DX588 in mine and after 18 months its starting to fail (dropping to 13.2 v for about 30 seconds at a time before returning to 13.5 / 13.7v). So as it has a 3 year waranty will be going back, but need another to fit so want to refurbish my Denso unit with a new rectifier.
Issue I have is they want you to return it to place of purchase for warranty claim. What the hell are you supposed to do while investigating.
Cheers
Craig

Originally Posted by CraigE

Hi all,
Does anyone have the part number for the rectifier kit for these? Or a reference guide as I am looking for a kit for a D4 2.7 alternator kit and seem to be hard to find.
I currently have an OEX DX588 in mine and after 18 months its starting to fail (dropping to 13.2 v for about 30 seconds at a time before returning to 13.5 / 13.7v). So as it has a 3 year waranty will be going back, but need another to fit so want to refurbish my Denso unit with a new rectifier.
Issue I have is they want you to return it to place of purchase for warranty claim. What the hell are you supposed to do while investigating.
Cheers
Craig

They are variable voltage alternators controlled by the ECM to reduce emissions, mine will sometimes go all the way to 12.7v under acceleration, then spike to 14.4v when I'm coasting down a hill. Because I've got a fridge in the back it often just stays around the 13.8 Mark these days