Alternator slip ring worn through after 10k miles...

[Conor]

Hi guys,

Quick one... I bought a reman Bosch alternator for my E class last year (Aprilish).. ita been about 10k miles.

Yesterday the usual symptoms appeared and after removing and inspecting the alternator, I see that the slip rings are worn through. I find this pretty brutal tbh.

What do you think? There is an auto electrician near me who should be able to rebuild that part for me thankfully.

I'd have a go myself but getting the slip ring off is a brutal job...

Pic attached below. I didn't want to risk taking further bits off but you can see the issue albeit not clearly.

Cheers
Conor

 

[Blobcat]

Was it a genuine Bosch? Way too many fakes around unfortunately

 

[Conor]

Well.. I don't know - It said Bosch on the label along with "Remanufactured in Slovakia" on the tag.

Anyway.. it's a bummer. I'm going to take it to get rebuilt tomorrow and see what he says about the 10k issue.

 

[ajlsl600]

My bet is fake Bosch. Take it back, suspect brush material sub std. Good alt shud last 100,000 k

 

[peterws1957]

Well.. I don't know - It said Bosch on the label along with "Remanufactured in Slovakia" on the tag.

Anyway.. it's a bummer. I'm going to take it to get rebuilt tomorrow and see what he says about the 10k issue.

I would ask your repairer if it's a fake job. If it is and it's a UK supplied Slovakian alt. I would take it up with the original seller. Depends how far you want to press it. As above so many fakes of everything around.

 

[star]

I think it’s contaminated with oil, which makes the dust act like a grinding paste. Unfortunately not a manufacturing fault. Seen this loads of times.

 

[Conor]

That did cross my mind actually.

The theory works.. in my head anyway..

 

[star]

Ive been thinking about this, more like poor conductivity due to oil, so sparking, hence only one ring wears. Either way it’s down to the oil.

 

[Conor]

Ive been thinking about this, more like poor conductivity due to oil, so sparking, hence only one ring wears. Either way it’s down to the oil.

Boo.

I suppose in the last 3-4k miles I've had two pretty outlandish leaks due to my error.

As part of the long running "oil consumption saga" I think it is part leak and part vale stem seals.

Need to do the rocker cover gaskets.