Question about diesel alternator...

Trisman · 10th January 2018, 13:24

Sorry 'bout this!

There is already masses about 2 -v- 3 pin alternators!

However:

Am I right in thinking that all early 2.0 CDT Rover 75's (2000 [W] in my case) had 3 pin alternators?

Reason I ask is that my Rover is currently parked-up in the middle of W.Sussex with the charging light illuminated & a flat battery, whilst I am in London. So I can't check it easily!

I ordered a 3 pin regulator thinking it'd be correct, (pretty sure it's the brushes gone on my car) & now have doubts after reading reams of diesel alternator stuff here!

(Plan was to drive down to where the 75 is, fit the regulator, jump start it & drive it somewhere a little more accessible, then get a train to recover the other car!).

I realise that two pin & three pin alternators are interchangeable, BUT AIUI, the regulators aren't. (So a 2 pin regulator won't fit a 3 pin alternator & vice-versa).

Any thoughts appreciated!

Lee T · 10th January 2018, 18:26

Hi I would take a fully charged battery to fit to the 75. As the car will do a considerable mileage before flattening the battery, if done in daylight limiting power usage.Then Do repair where your able. Check your slip rings when changing regulator. Lee

hinged_bap · 10th January 2018, 18:51

I have what I beleive to be one of the later alternators in my stash ( VALEO ) and within the D shaped plug thingy are 2 spade connectors.

and checking here:

https://www.dmgrs.co.uk/collections/...-and-yle102500

I just replaced the regulator pack ( 3 pin type ) on a 2001 diesel. ( I got a replacement ( 2 pin) alternator but never fitted it, just changed the regulator pack in situ - the brushes were shot ). I've never swapped analternator on a diesel but is allegedly a pig of a job.

https://www.the75andztclub.co.uk/for...d.php?t=230059
https://the75andztclub.co.uk/forum/s...d.php?t=243370

COLVERT · 10th January 2018, 20:00

Quote:

Originally Posted by Lee T

Hi I would take a fully charged battery to fit to the 75. As the car will do a considerable mileage before flattening the battery, if done in daylight limiting power usage.Then Do repair where your able. Check your slip rings when changing regulator. Lee

Do what this guy says. Perfect answer to your problem.----

Ravinder · 11th January 2018, 00:58

I’m in the exact same boat at the moment. My battery light came on three weeks ago. I drove it back from my friends, 35 miles and just made it home without getting recovered. Just have everything switched off. Minimise use of using brake lights etc too. You’ll probably get around 40-50 miles out of it if very careful.

Trisman · 12th January 2018, 22:51

Thanks for the replies.

I reckon I'd need two batteries then, as the car is about 70 miles from home!

I got someone to pull the plug...

Looks like it has a two pin regulator, in that only two of the three connection 'holes' in the plug on the wiring harness are populated. (The plug has three holes, but only two connectors}.

The regulator I bought has three pins...

Ho hum.

Bolin · 13th January 2018, 15:57

I think all have three connection spaces with just two populated, regardless of how many connections are on the alternator. I think you need to check the alternator itself.

COLVERT · 13th January 2018, 17:55

What Bolin says-----

Trisman · 14th January 2018, 15:40

Quote:

Originally Posted by Bolin

I think all have three connection spaces with just two populated, regardless of how many connections are on the alternator. I think you need to check the alternator itself.

I see my future...

Getting down to Midhurst with a car full of batteries, then driving the poorly Rover back to London, swapping batteries as I go....

Gonna cost too much to get someone to transport it! (& the RAC have been no help. Should have reported it as a breakdown

).

The mate who pulled the lead off the alternator said he can't see into the connector actually on the alternator as the power steering reservoir is in the way...

Was there a cut-off date when Rover swapped from three pin to two pin alternators?

Or did they use whatever came to hand?!

Lee T · 14th January 2018, 16:37

Take both 2 and 3 pin regulators and return the unused one. Changing regulator is a 15 min job all be it a bit awkward. 1 fully charged battery should get the car home if it's not a regulator issue like mine wasn't. Lee.

10th January 2018, 13:24	#1
Trisman Avid contributor Rover 75 saloon. Join Date: Feb 2016 Location: S.E. London Posts: 116 Thanks: 67 Thanked 31 Times in 22 Posts	Question about diesel alternator... Sorry 'bout this! There is already masses about 2 -v- 3 pin alternators! However: Am I right in thinking that all early 2.0 CDT Rover 75's (2000 [W] in my case) had 3 pin alternators? Reason I ask is that my Rover is currently parked-up in the middle of W.Sussex with the charging light illuminated & a flat battery, whilst I am in London. So I can't check it easily! I ordered a 3 pin regulator thinking it'd be correct, (pretty sure it's the brushes gone on my car) & now have doubts after reading reams of diesel alternator stuff here! (Plan was to drive down to where the 75 is, fit the regulator, jump start it & drive it somewhere a little more accessible, then get a train to recover the other car!). I realise that two pin & three pin alternators are interchangeable, BUT AIUI, the regulators aren't. (So a 2 pin regulator won't fit a 3 pin alternator & vice-versa). Any thoughts appreciated! __________________ [SIGPIC][/SIGPIC] Now gone: 2000 Rover 75 CDT. Manual. Tahiti blue (JRJ). Mods: EGR delete. Synergy 2E. In-line Thermostat. Electric, heated black leather seats. Chrome Skullcaps. Black steering wheel. 18" MG ZT 11 spoke wheels. Plenum spy-hole. In-dash Sat-Nav. Mesh grill. Repairs: Rad fan. Clutch/flywheel. Exhaust. Rear light seals. Front bushes & ARB links. Springs. A/C regas. Alternator regulator. Window 'B' post trim. Future: Remote boot release. Front end drop, 160 remap..!?

10th January 2018, 18:26	#2
Lee T Gets stuck in MG ZT Join Date: Jul 2014 Location: Liverpool Posts: 848 Thanks: 180 Thanked 248 Times in 189 Posts	Hi I would take a fully charged battery to fit to the 75. As the car will do a considerable mileage before flattening the battery, if done in daylight limiting power usage.Then Do repair where your able. Check your slip rings when changing regulator. Lee __________________ [SIGPIC][/SIGPIC]

10th January 2018, 18:51	#3
hinged_bap Gets stuck in 75 CDT Conn SE Auto saloon Join Date: Jun 2010 Location: Southampton Posts: 773 Thanks: 134 Thanked 104 Times in 81 Posts	I have what I beleive to be one of the later alternators in my stash ( VALEO ) and within the D shaped plug thingy are 2 spade connectors. and checking here: https://www.dmgrs.co.uk/collections/...-and-yle102500 I just replaced the regulator pack ( 3 pin type ) on a 2001 diesel. ( I got a replacement ( 2 pin) alternator but never fitted it, just changed the regulator pack in situ - the brushes were shot ). I've never swapped analternator on a diesel but is allegedly a pig of a job. https://www.the75andztclub.co.uk/for...d.php?t=230059 https://the75andztclub.co.uk/forum/s...d.php?t=243370 Last edited by hinged_bap; 10th January 2018 at 18:59..

11th January 2018, 00:58	#5
Ravinder This is my second home Rover 75 saloon x2, Rover 75 Tourer x2, Rover 220 Coupe Turbo Join Date: Aug 2010 Location: Kirkcaldy, Fife Posts: 9,036 Thanks: 2,278 Thanked 2,852 Times in 1,718 Posts	I’m in the exact same boat at the moment. My battery light came on three weeks ago. I drove it back from my friends, 35 miles and just made it home without getting recovered. Just have everything switched off. Minimise use of using brake lights etc too. You’ll probably get around 40-50 miles out of it if very careful. __________________ Wanted - Indian bride. Cash waiting. (All sorted - bargain) First name and forum name: Ravinder Rover 75 2.0 CDT Connoisseur SE 116 (160 remap) Royal Blue (JFM) This vehicle was the 50,481st 75 to run off the production line, out of 112,381 This vehicle was the 2,238th 75 CDT Connoisseur SE to be made out of 3,775 This vehicle was the 5,002nd 75 in Royal Blue (code: JFM) to be made out of 14,420 Royal Blue 75s

12th January 2018, 22:51	#6
Trisman Avid contributor Rover 75 saloon. Join Date: Feb 2016 Location: S.E. London Posts: 116 Thanks: 67 Thanked 31 Times in 22 Posts	Thanks for the replies. I reckon I'd need two batteries then, as the car is about 70 miles from home! I got someone to pull the plug... Looks like it has a two pin regulator, in that only two of the three connection 'holes' in the plug on the wiring harness are populated. (The plug has three holes, but only two connectors}. The regulator I bought has three pins... Ho hum. __________________ [SIGPIC][/SIGPIC] Now gone: 2000 Rover 75 CDT. Manual. Tahiti blue (JRJ). Mods: EGR delete. Synergy 2E. In-line Thermostat. Electric, heated black leather seats. Chrome Skullcaps. Black steering wheel. 18" MG ZT 11 spoke wheels. Plenum spy-hole. In-dash Sat-Nav. Mesh grill. Repairs: Rad fan. Clutch/flywheel. Exhaust. Rear light seals. Front bushes & ARB links. Springs. A/C regas. Alternator regulator. Window 'B' post trim. Future: Remote boot release. Front end drop, 160 remap..!?

13th January 2018, 15:57	#7
Bolin This is my second home Rover 75 2.5 V6 Connoisseur SE 4dr manual Wedgewood Blue 2 04-05/06/2001 Join Date: Nov 2006 Location: N.E. Hampshire Posts: 4,617 Thanks: 289 Thanked 308 Times in 243 Posts	I think all have three connection spaces with just two populated, regardless of how many connections are on the alternator. I think you need to check the alternator itself. __________________ "...the new Rover 75, which is a fabulous car......I think it looks fabulous....It's like sitting in a Rolls Royce......For me, this is the star of the show.....it looks so good" - J. Clarkson, motoring journalist on the launch of the Rover 75 in 1998.

13th January 2018, 17:55	#8
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	What Bolin says-----

14th January 2018, 16:37	#10
Lee T Gets stuck in MG ZT Join Date: Jul 2014 Location: Liverpool Posts: 848 Thanks: 180 Thanked 248 Times in 189 Posts	Take both 2 and 3 pin regulators and return the unused one. Changing regulator is a 15 min job all be it a bit awkward. 1 fully charged battery should get the car home if it's not a regulator issue like mine wasn't. Lee. __________________ [SIGPIC][/SIGPIC]

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