v70 alternator

scottym · May 24th, 2012, 00:58

one of my Volvos is a 2001 2.4T V70 (95k) . Had it for 6 or 7 years now and never let me down till couple of months ago when the alternator died and it cut out on the motorway .

I sourced a second hand unit ( the delights of this recession nessecitated that ) and fitted it . That unit has now decided to put its feet in the air and die .

Before I buy a new item . is there any "gizmo" which could have failed and is frying my alternator or am i just unlucky ? ( much prefer to work on my TR6 as everything is simple like me )

Bernard333 · May 24th, 2012, 10:23

The most likely thing to fail is the voltage regulator , these have a single brush inside which wears down and the elctronics inside it can fail , you can get a regulator off ebay but these days a complete used alternator for a P2 V70 can be had for £25 if you have time to shop around . There are power diodes connected to the output leads of the stator windings , these are reliable on this particular alternator and less likely to fail but if they do fail a good diy repair would be difficult as they are welded in place , I dont think soldering would be reliable enough . You can test the diodes easily with a multimeter , have a look on wiki for how to .

scottym · May 25th, 2012, 23:33

many thanks , Will get a new unit then . I thought there was a regulator in the the alternator ( certainly is in my old classic cars ) just wasnt sure with these new style electrics .

DieselDoNicely · Jun 5th, 2012, 22:33

Quote:

Originally Posted by scottym

many thanks , Will get a new unit then . I thought there was a regulator in the the alternator ( certainly is in my old classic cars ) just wasnt sure with these new style electrics .

Get the old one re conditioned, I did this with the 850, cost about £90. Make sure the place know what its doing.

May 24th, 2012, 00:58	#1
scottym New Member Last Online: Feb 7th, 2018 20:15 Join Date: Oct 2010 Location: alva	v70 alternator one of my Volvos is a 2001 2.4T V70 (95k) . Had it for 6 or 7 years now and never let me down till couple of months ago when the alternator died and it cut out on the motorway . I sourced a second hand unit ( the delights of this recession nessecitated that ) and fitted it . That unit has now decided to put its feet in the air and die . Before I buy a new item . is there any "gizmo" which could have failed and is frying my alternator or am i just unlucky ? ( much prefer to work on my TR6 as everything is simple like me )

May 24th, 2012, 10:23	#2
Bernard333 Premier Member Last Online: Oct 20th, 2021 11:41 Join Date: Nov 2007 Location: Ramelton	The most likely thing to fail is the voltage regulator , these have a single brush inside which wears down and the elctronics inside it can fail , you can get a regulator off ebay but these days a complete used alternator for a P2 V70 can be had for £25 if you have time to shop around . There are power diodes connected to the output leads of the stator windings , these are reliable on this particular alternator and less likely to fail but if they do fail a good diy repair would be difficult as they are welded in place , I dont think soldering would be reliable enough . You can test the diodes easily with a multimeter , have a look on wiki for how to .

May 25th, 2012, 23:33	#3
scottym New Member Last Online: Feb 7th, 2018 20:15 Join Date: Oct 2010 Location: alva	many thanks , Will get a new unit then . I thought there was a regulator in the the alternator ( certainly is in my old classic cars ) just wasnt sure with these new style electrics .

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