Cleaning aluminum engine - Alfa Romeo Bulletin Board & Forums
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post #1 of 38 (permalink) Old 08-25-2019, 11:28 AM Thread Starter
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Cleaning aluminum engine

Restoring a 62 Guilietta Spyder with a 1600cc engine, which has a heavy buildup of aluminum oxide. Used a Dremel with a wire wheel to remain the heavy deposits, but there are still a number of small areas that it wasn't able to clean up. I was thinking of using Purple Power to wipe down the engine cover to perform a final cleanup. I have heard both good and bad about Purple Power and aluminum, and wanted to get some input from knowledgable sources before I applied any to the engine cover.

Any other recommended solutions would also be appreciated.

Thanks, Norman
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post #2 of 38 (permalink) Old 08-25-2019, 02:08 PM
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if it isn't a stripped down.. I would rerecommend going to the Detailing Forum.......Stripped down bare blocks should be tanked by an engine re builder NOT BLASTED with ANY media which is NOT how they came from the factory. Blasting goes beyond casting finishes.

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post #3 of 38 (permalink) Old 08-25-2019, 06:25 PM
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+1 on Richard's warning.
Recently I refurbished a 59 Spider Veloce. I used stainless steel bristle (tooth) brushes, the kind you find in the welding section of your friendly big box store, on the bare aluminum. By hand, no power tools. I hand wiped the clean aluminum with a product recommended by a motorcycle restorer called Shark Hide Aluminum Sealer. The final finish looked every close to original.
Before sealing I may have used Mag Cleaner which is some kind of acid wash. I don't remember, test before using.

Jim
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post #4 of 38 (permalink) Old 08-25-2019, 07:46 PM
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Purple Power is rather caustic. It’s more likely to oxidize the aluminum than remove oxidation. Probably the wrong product for what you’re trying to do.

Tom

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Former: 1987 Milano Gold
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post #5 of 38 (permalink) Old 08-25-2019, 09:17 PM
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Yes, strong cleaners like that can cause black splotchy areas on raw aluminum - it's a chemical reaction. Some people just use strong Dawn and elbow grease and patience. I've had some luck with a magnesium wheel cleaner.

1967 1600 Spider
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post #6 of 38 (permalink) Old 08-25-2019, 09:49 PM Thread Starter
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Cleaning aluminum engine

Yes, just finished using Dawn with lots of elbow grease and then Mom's magnesium wheel cleaner this afternoon and everything looked great while it was still wet. But gave it an hour or so to dry, and then the original aluminum oxide (whitish) splotches reappear. Haven't used the Purple Power yet. I'm holding off on it until everything and anything else is tried.

Thanks Norman
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post #7 of 38 (permalink) Old 08-26-2019, 05:44 AM
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I have used "simple green" cleaner and have found it effective.
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post #8 of 38 (permalink) Old 08-26-2019, 06:22 AM
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I've had good results using mag wheel cleaner. Be aware it's aggressive and will remove cad and zinc plating from parts. My local auto machine shop has a water based hot washer that works well and-to me-is worth the cost.
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post #9 of 38 (permalink) Old 08-26-2019, 06:52 AM
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For aluminum parts, I like Extreme Simple Green Aircraft & Precision Cleaner. It's different than regular Simple Green and is safe for aluminum. It works pretty well and I haven't seen any darkening or etching of aluminum. I have diluted mixture in an ultrasonic cleaner for little parts too. Works great. https://simplegreen.com/industrial/p...ision-cleaner/
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post #10 of 38 (permalink) Old 08-26-2019, 06:58 AM
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I use gasoline...... with different scrub tools. works great!
Ric
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post #11 of 38 (permalink) Old 08-26-2019, 07:13 AM
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Quote:
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I use gasoline...... with different scrub tools. works great!
Ric
Gasoline?? how would I do that while smoking a cigar? Will a fire extinguisher mitigate the initial explosion? You have to know your audience with these cool ideas. The widow might sue Gulf Oil for not labeling the gas as not a cleaning agent.
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post #12 of 38 (permalink) Old 08-26-2019, 11:02 AM
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Quote:
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Will a fire extinguisher mitigate the initial explosion?
I've read that the foam grows your hair back.
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post #13 of 38 (permalink) Old 08-26-2019, 11:13 AM
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I've read that the foam grows your hair back.
I've heard hair grows after you are dead.
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post #14 of 38 (permalink) Old 08-26-2019, 07:14 PM
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Hey.. its NOT caustic and the aluminum looks like it should.. NO Cigar's Uncle!! Or whatever yall smokin up there.
Can one spray the extinguisher on one's head for hair growth? Before one's dead?
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post #15 of 38 (permalink) Old 08-26-2019, 07:18 PM
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You have to know your audience with these cool ideas. The widow might sue Gulf Oil for not labeling the gas as not a cleaning agent.


Morgan and Morgan
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