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buster73 buster73 is offline
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Join Date: Feb 2004
Location: Wine country, Germany
Posts: 606
Garage
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Originally Posted by zztot View Post
Curious as to what you did to refinish fan. Did is remove pulley for plating ?
Full explanation would be appreciated.
Looks great.
Fan actually was a present from my powder coater in NorCal many years ago. Powder coating went horribly wrong and his customer actually refused to accept (and pay) the fan coating with plenty of bubbles and terrible surface quality. My powder coater promised he will never coat a magnesium part again, after I explained him the fan was cast magnesium and something like "Alien technology". I manually grinded off all the remains of the powder coating (took days, if not weeks of grinding and lots of sanding paper) and then glass bead blasted the surface back to pure magnesium. Then simply coated the surface with WD40, and repeat a quick respray with WD40 as soon as any sign of corrosion appears (whitish build-up). Typically required twice a year. Otherwise no issues with magnesium for me. Sorry, pulley actually is just "fake galvanizing". After glass bead blasting the whole fan unit, I just protected the "naked" steel pulley with some golden paint. Drilling out the rivets and separating the pulley just for galvanizing would have been overkill - IMO. Not to mention the risk to crack the mag casting when resetting the new rivets. Of course this would be the perfect solution for a museum/collector car. You can also buy new galvanized pulleys, but still risk to crack your fan casting during riveting. Hope this helps ?
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Guenter

73.5 911T, mod
Old 04-26-2023, 09:32 AM
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