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#1
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What do you do about this?
Aluminum is turning yellow and corroding on the engine even though it is just sitting. Do I just polish it?
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. |
#2
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Looks like oil to me unless you clear-coated or aluminum paint on the heads and the coating started to burn off. Aluminum dulls and the forms white aluminum oxide on the surface.
Spray it with aluminum wheel cleaner and lightly scuff with a green scotchbrite. Rinse with clear water in a spray bottle and wipe dry. The apply a liberal coating of WD40 on all the aluminum parts and retreat periodically.
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Triple Black 1971 GTO |
#3
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Looks like oil to me also. Therefore I'd start with just a shop or terry towel soaked in brake clean, lacquer thinner, or acetone and see if it doesn't lift off. These won't change the surface texture and more aggressive attacks will.
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Mick Batson 1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon in progress. |
#4
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Unprotected aluminum corrodes quickly. Once you have clean the oil off, apply metal prep( a phosphoric acid solution) then apply Alodine to stop future corrosion.
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“It takes considerable knowledge just to realize the extent of your own ignorance.” Dr. Thomas Sowell |
#5
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Looks to me like iron laced dust rustin!
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#6
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Any idea what Alodine would do the the appearance of the aluminum? I'm assuming it would change the finish.
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#7
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It’s not oil. The engine hasn’t been run in months it’s not oil.
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. |
#8
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It's rust. The heads are blasted with metal during the manufacturing process. Sometimes specs of metal are embedded in the aluminum and then rusts.
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The Following 2 Users Say Thank You to PAUL K For This Useful Post: | ||
#9
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So what do I do? My machinist said a scotchbrite pad no cleaner
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. |
#10
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Correct, the only way I have been able to keep it from happening was to use a scotchbrite pad with CLR on it.
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66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
#11
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I've never had much of a problem but seemed to have luck with brake clean and a silver wire brush.
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#12
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Have you tried what he suggested?
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears '69 LeMans Vert, 350, #47 heads: Non-running project |
#13
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Can’t go out. Waiting on scotchbrite from amazon LOL
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. |
#14
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I assume you could use Iron Out.
Or Sodium Hydrosulfite powder if you have access to it. |
#15
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Get a loaf of bread too while at Walmart!
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#16
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I have two loaves of bread and two gallons of milk. I just ordered some scotchbrite pads and wd40 from Amazon. I also have 48 rolls of TP not because I am a hoarder but because I am on the Amazon subscribe and save program and we weren’t here much last month so we got that month and this months LOL
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. |
#17
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Paul is right, it is embedded rust. Had the same thing happen on my rpm intake and it keep getting worst as time went on. Never could find anything that would clean it up, so i just used high temp aluminum engine paint and sprayed entire intake. It turned out great, looks new again.
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The Following User Says Thank You to 400 Lemans For This Useful Post: | ||
#18
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X2 paint it. Had this problem with my intake years ago and painted it engine color. Did the same on this engine-intake and heads. Paint stays on aluminum heads shockingly well
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Chris D 69 GTO Liberty Blue/dark blue 467, 850 Holley, T2, Edelbrock Dport 310cfm w Ram Air manifolds, HFT 245/251D .561/.594L, T400, 9" w 3.50s 3905lbs 11.59@ 114, 1.57/ 60' |
The Following User Says Thank You to OCMDGTO For This Useful Post: | ||
#19
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Hit it with a small brass bristle brush
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#20
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Quote:
I usually etch intakes, but it's tough to do the same on heads. Wipe it with acetone, let it dry, and shoot them. .
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. 1970 GTO Judge Tribute Pro-Tour Project 535 IA2 http://forums.maxperformanceinc.com/...d.php?t=760624 1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car https://forums.maxperformanceinc.com...ght=procharger Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be |
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