[xj] S3 alternator

I need some advice from somone who has removed and replaced a S3 alternator.
On my late 82 the voltmetre occasionally drops from the normal 13.5 volts to
about 12 volts (the end of the red zone). It sometimes will stay there for
15 minutes or so then return to normal. I am presuming that this is a
voltage regulator warning, but if I am wrong please let me know. The Jaguar
service manual makes the alternator removal seem quite straightforward, from
under the car, but I have also been told that it is very difficult. Which is
true, and what are the tricks?
Gregory Andrachuk
Victoria, Canada

Several XJ owners I know, including me, have replaced the Lucas alternator
with a GM unit mounted up top. The Lucas unit is a bear to get out – you
must loosen and pivot the sway bar, and the area is usually quite greasy.
Just cut the belt and leave it in place until some other circumstance
gives you access to the area.

JohnOn Tue, 9 Mar 1999, Dr. Gregory Andrachuk wrote:

I need some advice from somone who has removed and replaced a S3 alternator.
On my late 82 the voltmetre occasionally drops from the normal 13.5 volts to
about 12 volts (the end of the red zone). It sometimes will stay there for
15 minutes or so then return to normal. I am presuming that this is a
voltage regulator warning, but if I am wrong please let me know. The Jaguar
service manual makes the alternator removal seem quite straightforward, from
under the car, but I have also been told that it is very difficult. Which is
true, and what are the tricks?
Gregory Andrachuk
Victoria, Canada

Correct. If I’m not mistaken, all you have to do is withdraw the
brushpack/internal regulator from the alternator, which shouldn’t
necessitate removing the alternator altogether.>I need some advice from somone who has removed and replaced a S3 alternator.

On my late 82 the voltmetre occasionally drops from the normal 13.5 volts to
about 12 volts (the end of the red zone). It sometimes will stay there for
15 minutes or so then return to normal. I am presuming that this is a
voltage regulator warning, but if I am wrong please let me know. The Jaguar
service manual makes the alternator removal seem quite straightforward, from
under the car, but I have also been told that it is very difficult. Which is
true, and what are the tricks?
Gregory Andrachuk
Victoria, Canada


Cheers-

William “Chip” Lamb
West of Sweden SAAB & Jaguar
Charles City, VA.
http://www.wmsbrg.com/sweden/


I need some advice from somone who has removed and replaced a S3 alternator.
On my late 82 the voltmetre occasionally drops from the normal 13.5 volts to
about 12 volts (the end of the red zone). It sometimes will stay there for
15 minutes or so then return to normal. I am presuming that this is a
voltage regulator warning, but if I am wrong please let me know. The Jaguar
service manual makes the alternator removal seem quite straightforward, from
under the car, but I have also been told that it is very difficult. Which is
true, and what are the tricks?

Hi Gregory. You can replace the voltage regulator without
completely removing the alternator, but it’s a fiddley job. From
underneath the car, you’ll need to unbolt the alternator from the
tensioner and the upper mount, and rotate the alternator until the
black plastic backing piece is pointing down to the floor. Then you
can remove the 3 or 4 screws holding the backing piece on, and
remove the backing piece. The regulator will then be exposed and
accessible. This took me about an hour, which was considerably
less time than it would have taken to reposition the sway bar and
remove the alternator through the bottom.

Take care,
Greg Price
JAGBITS.COM
http://www.jagbits.com
Jaguar Parts Specialists

John Napoli wrote:

Lucas alternator
with a GM unit mounted up top. The Lucas unit is a bear to

I need some advice from somone who has removed and replaced
a S3 alternator.

Use the FAQ, Luke!

Replacing the original:
http://www.jag-lovers.org/xjlovers/xjfaq/alt_rplc.htm

Putting in a GM unit:
http://www.jag-lovers.org/xjlovers/xjfaq/alternatorsgm.htm

May the FAQ be with you!

Gunnar> On Tue, 9 Mar 1999, Dr. Gregory Andrachuk wrote:


Gunnar Helliesen | Bergen IT Consult AS | NetBSD/VAX on a uVAX II
Systems Consultant | Bergen, Norway | '86 Jaguar Sovereign 4.2
@Gunnar_Helliesen1 | http://www.bitcon.no/ | '73 Mercedes 280 (240D)

It’s not that difficult. You do have to remove the outer sway bar mounts and
pivot it out of the way, but that’s it. I had my regulator replaced at a local
shop, and it was much faster and cheaper than replacing the alt.

Kevin

John Napoli wrote:> Several XJ owners I know, including me, have replaced the Lucas alternator

with a GM unit mounted up top. The Lucas unit is a bear to get out – you
must loosen and pivot the sway bar, and the area is usually quite greasy.
Just cut the belt and leave it in place until some other circumstance
gives you access to the area.

John

On Tue, 9 Mar 1999, Dr. Gregory Andrachuk wrote:

I need some advice from somone who has removed and replaced a S3 alternator.
On my late 82 the voltmetre occasionally drops from the normal 13.5 volts to
about 12 volts (the end of the red zone). It sometimes will stay there for
15 minutes or so then return to normal. I am presuming that this is a
voltage regulator warning, but if I am wrong please let me know. The Jaguar
service manual makes the alternator removal seem quite straightforward, from
under the car, but I have also been told that it is very difficult. Which is
true, and what are the tricks?
Gregory Andrachuk
Victoria, Canada