Classic cars forum & vehicle restoration.

mr911er · Joined: 29 Jan 2013 Posts: 31 Location: Redditch

Hi everyone

I want to clean up the engine a bit on my 1982 Porsche 911. I had a problem with the alternator recently, and have had to remove the fan and cowling, which I want to clean up, and maybe powder coat the fan.

They need blasting, but I have seen a few reports about shotblasting being too harsh - the parts are made of magnesium. No-one that I want to use seems to do beadblasting locally, so shotblasting will probably have o do.

Is it too harsh? Be interested to hear any comments

Thanks

Kevin

Rick · Site Admin Joined: 27 Apr 2005 Posts: 22442 Location: UK

Hi Kevin

Welcome back to the forum.

I think I'd err on the side of caution personally, do you have any photos to hand showing how bad they look?

RJ
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mr911er · Joined: 29 Jan 2013 Posts: 31 Location: Redditch

[img]

Let's see if this works lol

Regards

Kevin[/img]

mr911er · Joined: 29 Jan 2013 Posts: 31 Location: Redditch

[img]

Let's see if this works lol

Regards

Kevin[/img]

alanb · Joined: 10 Sep 2012 Posts: 516 Location: Berkshire.

Try Aqua blasting it ideal for alloys, brass, copper, & aluminium, or more delicate items.
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old tourer

Morris 8 two seater

D4B · Joined: 28 Dec 2010 Posts: 2083 Location: Hampshire UK

I would be tempted to brush on and agitate some alloy wheel cleaner,
then jet wash it off within 5 mins, see how that goes first...... ?

mr911er · Joined: 29 Jan 2013 Posts: 31 Location: Redditch

Aqua blasting or bead blasting may be the answer
Be amazed if alloy wheel cleaner will touch it, quite a lot of crap build up....
Anyone know does it? In north worcs

Cheers

k

MikeEdwards · Joined: 25 May 2011 Posts: 2470 Location: South Cheshire

Have you tried having a look on the restoration section on DDK? Lots of people restoring similar stuff, the parts they put back on always seem to be very nice and shiny.

mr911er · Joined: 29 Jan 2013 Posts: 31 Location: Redditch

MikeEdwards · Joined: 25 May 2011 Posts: 2470 Location: South Cheshire

Porsche restoration forum - Die Deutschen Klassiker - http://www.ddk-online.com/phpBB2/index.php - aim for the "technical" section and the restoration threads in there.

alanb · Joined: 10 Sep 2012 Posts: 516 Location: Berkshire.

found this on the web.
Metal Polishing in Amblecote, Stourbridge, Black Country,
www.imperialmetalpolishing.co.uk
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old tourer

Morris 8 two seater

mr911er · Joined: 29 Jan 2013 Posts: 31 Location: Redditch

Thanks Alan's
Did phone them. Left a message, but they couldn't be bothered to reply.
In the end I took it to Worcestershire powder. Oating in pershore. The know someone who could repair the fan too, so waiting for its return know.
Cheers Kevin...

greenbeam · Joined: 10 Jun 2015 Posts: 85 Location: Adelaide, Australia

I have just soda blasted some items myself and had very good results.

Small blasting units are available from fleaBay that hook up to a compressor, you fill them with sodium bicarbonate (bicarb - available in 10-20kg bags from butcher suppliers) and the stream of soda will remove paint, grease gunge, but will not remove metal (rusted or otherwise). Alloy carby bodies come up a treat, so your mag items should too.

The bicarb doesn't contain silicon, so can be done outdoors with simple dust mask, and hosing the area down dissolves the bicarb.

There is a bit of info on the web, but don't pay big $$ for a kit, the cheap ones are fine for infrequent home use. I bought mine for one job and have used it a couple of times since.

Regards,
Paul.
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1963 Sunbeam Alpine Series 3
1935 Armstrong Siddeley 17HP Sports Saloon
1935 Armstrong Siddeley 17HP Coachbuilt Saloon