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SC Alternator Fan and Housing


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Advise please

As my OEM Alternator is out for a rebuild I want to refresh the magnesium housing and fan. 
I have sent both to be Vapour Blasted at a place locally. 

My question is, what to do to reseal  the magnesium?
Any experience to share please?

I have been recommended to consider Surtec 650 or Chromate finish  

Your thoughts are appreciated 

Terry

911 SC 1980

 

 

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It depends upon how OEM you want to be, so it’s worth deciding that first.  There are a couple of people in the UK who can finish these to the original factory standard.  There are also some more modern solutions that seem to be able to withstand the environment in which the fan sits.  

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Terry, Chromate is the original finish.  If you find anyone to do that for you please let me know where as I asked all around my local area and one one was interested in doing the job. Happy to drive u the A12 if there is someone local to you.

Cheers, Richard. 

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1 hour ago, Ian Comerford said:

Try Nick Moss at Early 911 or Canford Classics

Hello Ian

thanks for your input so far  

Are your suggested company’s actually doing the refinishing or specialist Porsche people?

i am wishing to deal direct with the refinisher and share my results on the forum.

Terry

 

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2 hours ago, Raisinn said:

Hello Ian

thanks for your input so far  

Are your suggested company’s actually doing the refinishing or specialist Porsche people?

i am wishing to deal direct with the refinisher and share my results on the forum.

Terry

 

I would not bother.   The specialists have a preferential rate with the refinishers due to volume.  

The pulley half section uses special rivets to attach to the fan which are not freely available. 

I don’t think you will save any money and if your fan lets go, there will be no comeback.

 

 


 

 

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Angus at CamperCo / Greatworth Classics did a good job on mine

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2 hours ago, PeterK said:

Angus at CamperCo / Greatworth Classics did a good job on mine

What process did he use Peter?

I notice Nick Moss no longer offers this service.  

Al.

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Sorry, not sure but it was pulled apart, ’treated’ and new rivets used.  It looks like I expected, so I’m happy.

Call him ?

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Greatworth Classics bought Nick Fulljames' chromate plant AFAIK. The finished product looks excellent but bear in mid that chromate is a dark grey finish.

I will be using that in due course - got a small out fan housing out being mag welded since 2010 :D

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14 hours ago, Flat 6 said:

What process did he use Peter?

I notice Nick Moss no longer offers this service.  

Al.

I have contacted Greatworth and can confirm they Chromate the fan housings. 
Terry

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19 minutes ago, Diesel76 said:

for mag motorbike wheels I use Steve: http://tpcs-magnesium-refurbs.co.uk/

 

He always seems to have Porsche bits sent over from Europe to refinish and very reasonable rates last time I used him

Thanks for the lead Diesel76.

Have checked their website and it appears they only do powercoating.

I am after as near oem finish so their service will not be for me. 
Thanks

Terry

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Thanks to all the contributors so far. 
Phil- A1 Anodising and Pierce Polishing are a good way from my location so will not take those any further. 
Jonny Hart- thanks for the advice re the rivets, leads me to consider whether I take the fan apart now or consider a process for the item as a whole. 
I have found some companies within striking distance of North Essex so will check those out and report back. 
Happy to have further ideas. 
Terry

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Hi all

thanks for your contributions. 
I investigated companies in North Essex. 
Results are not great, 

Was recommended to try Surtec650 or Iridite NCP conversion coatings. 
They have superceded Chromate which is a very hazardous process. 
However, those two processes do not take to magnesium. 
There is a company in Essex that do Chromate coating but are unwilling to guarantee their work on Porsche fan housings!!!

Bit the bullet and went to Greatworth Classics near Banbury. 
They agreed to turn around my job inside 3 hours. 
Their workshops are amazing, with many restorations of Porsche’s and campervans in progress. 
Virtually every part of the process can be done in-house from body restoration, engine and gearbox rebuilding, upholstery work and paint work. 
Was so pleased to be shown around by their enthusiastic staff. 
Oh, and the fan housing and fan. 
degreased and Chromate finished for me and what a lovely job to get sorted. 
They are happy to receive your parts for refreshing by post and are happy to discuss your requirements. 
Thanks for the recommendation PeterK. In

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So, everything back together and looks smart. 
Akternator was checked and confirmed as working well. 
HOWEVER, I still have no charge going to the battery. 
I have bridged the wires to the external SEV Marchal Regulator and the alternator is then sending 14.9 v to the battery at idle. 
Therefore I assume the external regulator is duff. 
Anyone know where I can get an original SEV unit other than from America?

Anyone got a surplus unit gathering dust maybe?
Trying to keep my car as original as possible. 
Terry

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On 19/10/2020 at 11:55, Raisinn said:

Hi all

thanks for your contributions. 
I investigated companies in North Essex. 
Results are not great, 

Was recommended to try Surtec650 or Iridite NCP conversion coatings. 
They have superceded Chromate which is a very hazardous process. 
However, those two processes do not take to magnesium. 
There is a company in Essex that do Chromate coating but are unwilling to guarantee their work on Porsche fan housings!!!

Bit the bullet and went to Greatworth Classics near Banbury. 
They agreed to turn around my job inside 3 hours. 
Their workshops are amazing, with many restorations of Porsche’s and campervans in progress. 
Virtually every part of the process can be done in-house from body restoration, engine and gearbox rebuilding, upholstery work and paint work. 
Was so pleased to be shown around by their enthusiastic staff. 
Oh, and the fan housing and fan. 
degreased and Chromate finished for me and what a lovely job to get sorted. 
They are happy to receive your parts for refreshing by post and are happy to discuss your requirements. 
Thanks for the recommendation PeterK. In

Any photos of the finished job please?

Thanks

Russ

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3 hours ago, Rustybum said:

Oh ok.🤔

I thought you just clicked on “Add files”

😳

Only if you are a paid member otherwise you need to 3rd party host ie Imgur.

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10 minutes ago, Phill said:

Only if you are a paid member otherwise you need to 3rd party host ie Imgur.

Ahhhh of course.😁👍

That's a shame, it would have been good to see the finished fan and housing.

I’m wanting to get mine done at some point.

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2 hours ago, Rustybum said:

Ahhhh of course.😁👍

That's a shame, it would have been good to see the finished fan and housing.

I’m wanting to get mine done at some point.

The fans and housings in our alternator  video are done by Greatworth Classics:

https://www.classicretrofit.com/products/copy-of-porsche-911-high-output-175a-alternator

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