Battery nearly exploded on my Rolls!

[tee]

Hi guys, chugging along and I get a crazy suffocating smell, popped boot and the battery was leaking and had bulged out! I'm assuming regulator has gone on alternator
causing overcharge..?

I've heard there's a few Lucas alternators that fit my car, it's a 70's Silver Shadow 2. I'm trying not to fork out top whack for a new Rolls Royce one, anyone know what other models fit? Ta

[MrSpeedy]

Do you know what alternator it is?
If it's a Lucas one then it shouldn't be difficult to find an alternative

[chairchild]

any pics of the alternator? If it's a Lucas one, there's bound to be virtually hundreds of possible donor cars, depending on its shape ;D

[guz]

swap regulator only ?

[MrSpeedy]

Mar 12, 2012 17:46:16 GMT guz said:

swap regulator only ?

That is the cause of the overcharging tbh. Depending on which alternator it is, it could even be a remote 4TR or similar regulator.

Pics are needed!

[composimmonite]

Why not take it to a decent autoelectrician who will be able to put the alternator on a test bed (motor / drive belt with gauges to check output) to determine the fault and then get the original repaired.
I don't know if this helps but shows the CAV AC5 is original spec so you could see what other cars have that fitted -
www.ebay.co.uk/itm/Rolls-Royce-Silver-Shadow-CAV-AC5-12-53-12-Volt-Alternator-Price-includes-VAT-/260918234646?pt=UK_CarsParts_Vehicles_BoatEquipment_Accessories_SM&hash=item3cbff04e16

Paul H

[Porsche]

I've got Lucas catalouges in my garage, but I'm not by them at the mo' so I'll have a check tomorrow for ya, but after searching the net I've come up with this....

LRA02864, 12 Volt, Int. Regulator
EXCHANGE ALTERNATOR 180A BMW


Make Model ccm Date
BMW 735i 3.6 (E65 E66) 3600ccm N62B36A 01-03
BMW 745i 4.4 (E65) 4398ccm N62B44A 01-03
BMW 745i 4.4 (E66) 4398ccm N62B44A 02-03
BMW 760i 6.0 (E65) 5972ccm N73B60 02-08
BMW 760i 6.0 (E66) 5972ccm N73B60 02-08
ROLLS-ROYCE Drophead 6.8 6749ccm N73B68 07-
ROLLS-ROYCE Phantom 6.8 6749ccm N73B68 03-
ROLLS-ROYCE Phantom coupe 6.8 6749ccm N73B68 08-

Cross ref no.
01220AA090
01220AA090WH
01220AA160
12317507741
12317507995
12317523606
12317523608
12317526286
7507741
7507995
7523606
7523608
7526286

Is your Rolls one of the above? If so, it looks like the 7 series BMW is the same.

[RetroMat]

I should know (cos I work on Rolls/Bentleys every day ) but cant quite remember atm. But don't shadow 2s have the alternator regulator in the boot next to the battery? I'm sure i've fitted a durite equivalent/replacement to one before.

[MrSpeedy]

If it is an AC5 then originally it would have an external regulator, but they can be converted and fitted with modern inbuilt regs. I think we may have a recon unit on the shelf, so let me know if you want it.

[30psi]

The Lucas althernator on my Thunderbird cost me £52 to replace. It was on the shelf in the shop I went to

[surprisingskoda]

Mar 12, 2012 19:34:47 GMT Porsche said:

Make Model ccm Date
BMW 735i 3.6 (E65 E66) 3600ccm N62B36A 01-03
BMW 745i 4.4 (E65) 4398ccm N62B44A 01-03
BMW 745i 4.4 (E66) 4398ccm N62B44A 02-03
BMW 760i 6.0 (E65) 5972ccm N73B60 02-08
BMW 760i 6.0 (E66) 5972ccm N73B60 02-08
ROLLS-ROYCE Drophead 6.8 6749ccm N73B68 07-
ROLLS-ROYCE Phantom 6.8 6749ccm N73B68 03-
ROLLS-ROYCE Phantom coupe 6.8 6749ccm N73B68 08-


Is your Rolls one of the above? If so, it looks like the 7 series BMW is the same.

[/b][/quote]

He said a '70s RR, and the oldest one you listed was made in the next millenium - wouldn't think it would be one of them tbh.

[OVY871]

Mar 12, 2012 23:47:55 GMT surprisingskoda said:

Mar 12, 2012 19:34:47 GMT Porsche said:

Make Model ccm Date
BMW 735i 3.6 (E65 E66) 3600ccm N62B36A 01-03
BMW 745i 4.4 (E65) 4398ccm N62B44A 01-03
BMW 745i 4.4 (E66) 4398ccm N62B44A 02-03
BMW 760i 6.0 (E65) 5972ccm N73B60 02-08
BMW 760i 6.0 (E66) 5972ccm N73B60 02-08
ROLLS-ROYCE Drophead 6.8 6749ccm N73B68 07-
ROLLS-ROYCE Phantom 6.8 6749ccm N73B68 03-
ROLLS-ROYCE Phantom coupe 6.8 6749ccm N73B68 08-


Is your Rolls one of the above? If so, it looks like the 7 series BMW is the same.

[/b][/quote]

He said a '70s RR, and the oldest one you listed was made in the next millenium - wouldn't think it would be one of them tbh.[/quote]

He also said:

Mar 12, 2012 13:05:22 GMT tee said:

it's a 70's Silver Shadow 2.

So no its not one of those but I'm sure he'll appreciate the help.

[Porsche]

Mar 13, 2012 0:48:13 GMT OVY871 said:

Mar 12, 2012 23:47:55 GMT surprisingskoda said:

He said a '70s RR, and the oldest one you listed was made in the next millenium - wouldn't think it would be one of them tbh.

He also said:

Mar 12, 2012 13:05:22 GMT tee said:

it's a 70's Silver Shadow 2.

So no its not one of those but I'm sure he'll appreciate the help.

Sorry about that guys....it was just a quick internet search.

Anyhow, I've now got my old Lucas Exchange Units catalogues in front of me, and guess what? They don't list Rolls-Royce.

But all is not lost, if you can remove the alternator and tell me what the part number is (It should be on the plastic end cover) I can cross reference it and find out what other makes/models it was fitted to. The part number should start with LRA.

[tee]

Thanks a mill guys your legends, I'll check part number on alternator tomorrow, I've actually managed to source a used one for £75 plus £25 for the regulator, should have asked but I assume as separate prices they are separate units. I'll post up part number tomorrow Porsche

[tee]

Ive decided to get the regulator changed first, part number of this is: 1697-D222.
Going by Rolls Royce SS alternators on eBay, it seems mine is a CAV AC5 12-53 12 Volt alternator. What other models have this?

[tee]

Still having problems with this. Does anyone know if I can get an alternator with a built in regulator and fit this to the Rolls?

Also looking at the pics below, as you can see the regulator shows High, Medium and Low. On mine there are wires on all 3. Seems strange, I have however been driving it around like this fine for a few weeks now until the overcharge problem started.





Any auto-electricians out there around Leicester area..