[sandmaennle]

That's why I suggested checking at the front first, then you will know if the alternator is charging, if you get a positive result, then you can work your way back. No point checking that fuse if you have no power going there.

Ok. Got that, John. I checked the fuses first. They are ok. Tomorrow I will check the output of the alternator. Or generator? In German you call it Lichtmaschine. Means light-machine. It is an old name coming from the times where this part delivered the power mostly for the head lamps .
I think tomorrow I will only state that the generator is dead .

Dirk

 

[sandmaennle]

Checked the big fuses. Nice little pieces with 150A to 450A
They are all ok.
My personal highlights for today is my new ctek and a glas of Glen Scotia with my wife

Thank you for your help and have a nice evening. See you tomorrow
Dirk

 

[sandmaennle]

Many diagnostic tools will show voltage at the OBD port.

Have a smell of your alternator, does it smell like an electrical burn smell in the area.

I have also just fitted the alternator that you reference above, shown here with my old one.
The old one was shorted to earth on 2 of the 3 windings.
My car is much older and is a 2.7..
View attachment 192906

Thank you for the pictures. I checked mine with an endoscope camera. I have exactly the same Denso type. So I think, there is a mistake in the manual. This type is a 150A alternator.

Dirk

 

[Horlicks]

If you google "denso jaguar 220a" only XJ light machines show up.

 

[sandmaennle]

And Dodge RAM Alternators for their 6.7 v8

 

[PeteA]

Ok. Got that, John. I checked the fuses first. They are ok. Tomorrow I will check the output of the alternator. Or generator? In German you call it Lichtmaschine. Means light-machine. It is an old name coming from the times where this part delivered the power mostly for the head lamps .
I think tomorrow I will only state that the generator is dead .

Dirk

There is also a technical difference between an alternator and a generator.. I used to be able to remember what (without the use of an internet search engine)...

 

[wilf]

An alternator IS a generator.
But so is a dynamo........

 

[PeteA]

An alternator IS a generator.
But so is a dynamo........

I didn't say an alternator isn't a generator Wilf...

 

[wilf]

Indeed not, I was simply expanding on your thoughts.........

 

[The vast minority]

Thank you for the pictures. I checked mine with an endoscope camera. I have exactly the same Denso type. So I think, there is a mistake in the manual. This type is a 150A alternator.
View attachment 192921

View attachment 192922

Dirk

Great progress, if the original Alt is the same as my old one, @150 amps and we know that the Lucas LRA03641 you have identified is an effective replacement, as it is in my car, then happy days.
I did a how-to guide on this job very recently. If you have not seen it, the link is below.

The plastic bottle in the shots was there to cover the alternator live lead. I had to run the car with this lead disconnected to move it and get it on the ramps because my alternator was so badly shorted to ground.You wont need this of course, because you are still able to run the car.
Im 99.99% sure that the same process to get the Alt out and back in again will apply to the 3L engine.

Al

X250 2.7 V6 alternator removal and replacement.

 

[sandmaennle]

Great progress, if the original Alt is the same as my old one, @150 amps and we know that the Lucas LRA03641 you have identified is an effective replacement, as it is in my car, then happy days.
I did a how-to guide on this job very recently. If you have not seen it, the link is below.

The plastic bottle in the shots was there to cover the alternator live lead. I had to run the car with this lead disconnected to move it and get it on the ramps because my alternator was so badly shorted to ground.You wont need this of course, because you are still able to run the car.
Im 99.99% sure that the same process to get the Alt out and back in again will apply to the 3L engine.

Al

X250 2.7 V6 alternator removal and replacement.

Thank you, Al. Really nice guideline!!
I can't jack my Jag up like you did. Your workplace under the car is really amazing . But is really not the easiest job

Dirk

 

[sandmaennle]

Checked the alternator this afternoon. Belt is ok. Alternator is turning. I could see some internal parts of the rotor turning.
Measured the output directly at the alternator.
Before starting the engine = 12.95 V
With running engine = 12.14 V

Definitely dead
So I will go for a new or refurbed alternator.
My type -> Denso 10 42 10 - 6120 (labeled with Jaguar part number)

Video of the alternator turning: Alternator

I will keep you updated. Thank you for your help

Dirk

 

[sandmaennle]

Just ordered a new generator. It is not an original Denso. It is a China part. I hope, the generator will last longer than my chinese valve covers .
I think, all new spare parts from autodoc or others are from China, too. In my job I receive motor components (rotor and stator) from my chinese supplier. Sorry to say that, they are really good and even better than the parts I receive from european suppliers. So I really hope, I didn't buy a cheap spare part which will brake again within the
next 12 months. I am not 100% convinced, that I made the right decision. But the original Jag part is 880 EUR Keep fingers crossed!

Dirk

 

[ninjag]

I'm positive the replacement Denso I bought was 180A?

 

[sandmaennle]

Nice. More power for the batteries
My Denso is a 150A . The original one and the "copy". Following the manual I would have choosen a 220A

Dirk

 

[hamedhbb]

Nice. More power for the batteries
My Denso is a 150A . The original one and the "copy". Following the manual I would have choosen a 220A

Dirk

Have you seen this:

JAGUAR XK / XF / XJ / F TYPE / XE ALTERNATOR C2D42135 for sale online | eBay

Find many great new & used options and get the best deals for JAGUAR XK / XF / XJ / F TYPE / XE ALTERNATOR C2D42135 at the best online prices at eBay! Free delivery for many products!

www.ebay.co.uk

 

[sandmaennle]

Have you seen this:

JAGUAR XK / XF / XJ / F TYPE / XE ALTERNATOR C2D42135 for sale online | eBay

Find many great new & used options and get the best deals for JAGUAR XK / XF / XJ / F TYPE / XE ALTERNATOR C2D42135 at the best online prices at eBay! Free delivery for many products!

www.ebay.co.uk

Found it, but the label is slightly different to my Denso. But you are right. The electrical data are the same as my Denso. If you check the Denso page you will find this type. But you won't find my type .

DENSO

Would be worth to try it, if I were in the UK . If I could wait another 2 weeks for the part it would be a very interesting option. Half the price than the orignal
Jaguar part sold in Germany . There is a much better market for these parts in the UK.

Ciao
Dirk

 

[hamedhbb]

This is a 2

Found it, but the label is slightly different to my Denso. But you are right. The electrical data are the same as my Denso. If you check the Denso page you will find this type. But you won't find my type .

DENSO

View attachment 192959

Would be worth to try it, if I were in the UK . If I could wait another 2 weeks for the part it would be a very interesting option. Half the price than the orignal
Jaguar part sold in Germany . There is a much better market for these parts in the UK.

View attachment 192964


Ciao
Dirk

this is 220A version ( hence -Ax suffix). I guess it’s for cars with stop/start.

I noticed import charges

 

[sandmaennle]

This is a 2

this is 220A version ( hence -Ax suffix). I guess it’s for cars with stop/start.

I noticed import charges

That's the reason why I thought 220A is the right type for me. I have a Start Stop System . But all dealers only have this 150A type as the correct spare type for my car. So I assume 150A is correct. It would be more safe, if Denso had the type 104210-6120 listed on their page. That would be the final proof for the current. But let's believe, all dealers check there data with Jaguar or Denso to assure that they sell the right product

If I consider the electrical data, Start-Stop-System affects mostly the starter. During the start of the engine the power is delivered by the battery. To re-charge the battery, the system uses approx 25A (for a AGM 95Ah battery) charging current. Usually 20%..30% of the capacity of the battery. Only valid for AGM types. So there is still around 120A for the rest of the system. If you switch on every system like heater, heated windscreen and so on, you would dissipate maybe 50-70A. Still 50A gap for additional consumers. So it would be interesting what kind of batteries and equipment the car has, that has a 220A generator
But that's the theory. It would be nice to know, how much the charging current for a AGM battery really is. It depends on the charge status of the battery and the charging controller. And of course, if somebody would measure the current output of the generator directly down where I measured the voltage ...while driving around ....but indeed would be nice to know.
I will measure the current after my exchange of the generator. I am under the car anyway

Cheers
Dirk

 

[hamedhbb]

That's the reason why I thought 220A is the right type for me. I have a Start Stop System . But all dealers only have this 150A type as the correct spare type for my car. So I assume 150A is correct. It would be more safe, if Denso had the type 104210-6120 listed on their page. That would be the final proof for the current. But let's believe, all dealers check there data with Jaguar or Denso to assure that they sell the right product

If I consider the electrical data, Start-Stop-System affects mostly the starter. During the start of the engine the power is delivered by the battery. To re-charge the battery, the system uses approx 25A (for a AGM 95Ah battery) charging current. Usually 20%..30% of the capacity of the battery. Only valid for AGM types. So there is still around 120A for the rest of the system. If you switch on every system like heater, heated windscreen and so on, you would dissipate maybe 50-70A. Still 50A gap for additional consumers. So it would be interesting what kind of batteries and equipment the car has, that has a 220A generator
But that's the theory. It would be nice to know, how much the charging current for a AGM battery really is. It depends on the charge status of the battery and the charging controller. And of course, if somebody would measure the current output of the generator directly down where I measured the voltage ...while driving around ....but indeed would be nice to know.
I will measure the current after my exchange of the generator. I am under the car anyway

Cheers
Dirk

The audio system uses 20-30A peak. The listing says it’s mostly for petrol cars and 3.0D disco. I am not sure if it’s mechanically identical though. Atleast the overrunning pulley looks different.
Bear in mind if overrunning pulley malfunctions, a higher rating alternator will exert more load dump to suppressor (if any fitted?) or electronic modules. A couple of modules I have checked are only immune to 35V load dump. I am not sure if suppressor on the Jags are universal or depending on alternator rating.
I would stick to the original rating to be on safe side.