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Junior Member
Join Date: Dec 2004
Posts: 7,209
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Question-Clear coat over polished fan?
Should I clear coat over my newly polished fan? Will it yellow? I believe my wheel lips are clear coated and they seem to be holding up. Anyone out there have experience with this?
Cheers
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06-01-2008, 04:03 PM
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Join Date: Mar 2004
Location: Windsor, CT
Posts: 2,119
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I clear coated the fan, and after 3 years about half the finish has flaked off. I think corrosion tunneled under the coating and popped it off.
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Mike '82 911SC, SSI, 22/29 tbars, 22F/22R Adj swaybars, Bilstein Sport, Elephant polybronze & monoballs, Cambermeister bar, turbo tierods, Carrera oil cooler, front brake cooling ducts, Sparco Sprint 5 & Recaro SRD PAX seat, Teamtech harness, DAS Sport rollbar. |
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06-01-2008, 04:05 PM
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Join Date: Jan 2003
Location: Dublin, CA
Posts: 6,283
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I used Wurth Lacquer Spray Special (RAL1930) on my sand blasted fan and housing - it has held up well.
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Sergio The GT Lid Whisperer PCA 42yrs - National DE Instructor / Ex-RGruppe #197 '19 718 Cayman S (9th Porsche/1st with PDK) '14 Subaru Forester XT (Porsche support vehicle) Last edited by PCA7GGR; 06-01-2008 at 04:23 PM.. Reason: add text |
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06-01-2008, 04:23 PM
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Have it powder coated clear, problem solved
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Byron  20+ year PCA member  Many Cool Porsches, Projects& Parts, Vintage BMX bikes too |
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06-01-2008, 04:58 PM
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3.4 Bigger is better
Join Date: Nov 2003
Location: South Dakota
Posts: 1,497
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I polished mine and then powder coated clear. The pc is staying on just fine but the fan is no longer shiney as the mag fan has oxidized under the clear coat. Actually like the look of the fan this way. No pics of the way it is now but this is the way it started.
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Michael 88 911 Diamond Blue CE Carrera 3.4 HC3.4 member 2020 Honda Passport |
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06-01-2008, 08:23 PM
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Yup! what Byron said.
powder coat is the way to go on a spinning component which is subject to rock and sand impacts, as well as weather damage. Powdercoating is a great solution to all these ailments.
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78 911 SC "Scratchy" 2004 Mini Cooper S "Pele" (gone but not forgotten) 1979 classic mini clubman-"Coolio" |
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06-01-2008, 08:26 PM
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Join Date: Aug 2001
Location: SoBay, SoCal
Posts: 1,369
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Quote:
So is there any way to keep this polished look? (besides elbow grease)
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Mike '86 911 coupe '85 BMW 535i '11 Cayenne |
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06-01-2008, 09:19 PM
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Max Sluiter
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Did the Magnesium react with the coating in an oxidation reaction or is the coating porus enough to let in oxygen? Or was air trapped in there while coating?
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
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06-01-2008, 09:20 PM
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I glass blasted my fan housing and fan, and treated with Gibbs brand.
John
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997 C2S 2005 "Slate grey"(special order 1965color) 911 SC 1978 Silver/black 34.000 miles from new! 911 2.2 S 1971 Albert Blue/Black and 911 2.2 T 1971 Tangerine/Blood Orange/Black Sold: 911 2.4 S 1973 Viper Green/Kelly Green; 993 C4S 1996 Black/black; 993 C4 1994 Black/Black; 996 C4 2000 Black/Black; 996 Turbo 2003 Silver/Black |
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06-02-2008, 04:13 AM
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Bill is Dead.
Join Date: Jul 2005
Location: Alaska.
Posts: 9,633
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Another here for glass + gibbs.
I would consider anodize before I would consider powder coating.
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06-02-2008, 05:06 AM
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Junior Member
Join Date: Dec 2004
Posts: 7,209
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Thanks for the input. Sounds like lots of ways to go about it. Would there be any clearance issues with powder coating? Also, is there a woodruff key on the Turbo models. My alternator and fan have slots for one but it was not there when I took it apart. Does the washer put pressure against the alternator? In the parts catalog I do not see a key listed.
Cheers
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Remember, it's not a lie if you believe it. |
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06-02-2008, 09:01 AM
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Bill is Dead.
Join Date: Jul 2005
Location: Alaska.
Posts: 9,633
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I have read threads right here on Pelican that explain some people have had to sand the PC off the ends of the blades so that they would clear the housing. Unfortunately, this creates a wide-open area for moisture and oxygen to infiltrate between the magnesium and the PC - creating a potential corrosion area.
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-.-. .- ... .... ..-. .-.. -.-- . .-. The souls of the righteous are in the hand of God, and no torment will ever touch them. |
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06-02-2008, 09:20 AM
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Quote:
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Sal 1984 911 Carrera Cab M491 (Factory Wide Body) 1975 911S Targa (SOLD) 1964 356SC (SOLD) 1987 Ford Mustang LX 5.0 Convertible |
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06-02-2008, 11:05 AM
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3.4 Bigger is better
Join Date: Nov 2003
Location: South Dakota
Posts: 1,497
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Magnesium oxidizes even after being powder coated. I have no problem with the PC on the fan. The aluminum intake that I powder coated looks just like it did when it was done 3 years ago. There was a thread here on PP about this that I read saying the fan would oxidize underneath the PC. Thought I would try it anyway. The only way to keep them shiny IMHO is to keep polishing an uncoated fan. I will get a current picture of the fan posted as soon as I can. This is the aluminum intake using the same PC as the fan.
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Michael 88 911 Diamond Blue CE Carrera 3.4 HC3.4 member 2020 Honda Passport |
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06-02-2008, 08:57 PM
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The Puff.
Join Date: Sep 2007
Location: U.S. Navy
Posts: 1,290
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Nice
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06-02-2008, 11:01 PM
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Registered
Join Date: Mar 1999
Location: Cornwall-on-Hudson, New York, USA
Posts: 4,499
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The problem with magnesium is that it's microscopically porous, and there's absolutely no way to get foreign elements--dirt, etc.--totally out of those pores. So when you coat it--I tried using a POR-15 product, can't remember exactly what it was called--they soon begin to do whatever they're gonna do (corrode, oxidize, whatever) under the coating no matter how hard and permanant that coating is supposed to be. Bottom line is there's no way to coat a fan with anything that'll work.
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Stephan Wilkinson '83 911SC Gold-Plated Porsche '04 replacement Boxster |
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06-03-2008, 06:01 AM
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Gibbs penetrates into the pores......
John
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997 C2S 2005 "Slate grey"(special order 1965color) 911 SC 1978 Silver/black 34.000 miles from new! 911 2.2 S 1971 Albert Blue/Black and 911 2.2 T 1971 Tangerine/Blood Orange/Black Sold: 911 2.4 S 1973 Viper Green/Kelly Green; 993 C4S 1996 Black/black; 993 C4 1994 Black/Black; 996 C4 2000 Black/Black; 996 Turbo 2003 Silver/Black |
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06-03-2008, 09:56 AM
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I may have been the first with the Gibbs on the fan... held up really nice and developed a good magnesium patina, grey and non-oxidized look.
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Robert Williams 70' 911T |
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06-03-2008, 10:35 AM
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I may have been the first with the Gibbs on the fan... held up really nice and developed a good magnesium patina, grey and non-oxidized look.
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Robert Williams 70' 911T |
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06-03-2008, 10:36 AM
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Registered
Join Date: Aug 2006
Location: Manchester MD
Posts: 90
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Mine is coated with a light oil mist from my leaking pulley seal!
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06-03-2008, 12:49 PM
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