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how do these places that sell engines get the aluminum so clean?

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Old 01-19-2011, 08:36 AM
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This is goign to sound crazy, but here it goes. I use aerosol paint stripper from Lowes, with the green scotchbrite. I've used this on a bunch of cast aluminum pieces, and it always works really good. Just make sure that you wear gloves while doing it.
Old 01-19-2011, 10:52 AM
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^^^^Great signature.
Old 01-19-2011, 10:59 AM
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The purple jug of Castrol Super Clean (I think goes by other names) always works fantastic for me. Though I have to say when I got my heads hot bathed at the machine shop they got way cleaner than I could get them.
Old 01-19-2011, 11:24 AM
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The quickest, easiest, and cheapest way to clean aluminum that i have found has been muratic acid. I cleaned all of the suspension components and brackets on my Vette using the stuff. Spray it on, wait 45 - 60 seconds and spray it off. It leaves a nice finish and gets all of the stains out.
Old 01-19-2011, 03:02 PM
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Originally Posted by DMM
The quickest, easiest, and cheapest way to clean aluminum that i have found has been muratic acid. I cleaned all of the suspension components and brackets on my Vette using the stuff. Spray it on, wait 45 - 60 seconds and spray it off. It leaves a nice finish and gets all of the stains out.
be very careful with muratic acid, it will eat anything that isnt thick metal. I've seen some junkyards use pressurized gasoline and it cleans like nothing I've seen before, but doesn't seem orthodox or safe, but it really cleans super!
Old 01-19-2011, 06:50 PM
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Originally Posted by S10xGN
Glass bead! I beaded all my loose parts, then taped and tented the long-block and beaded it too...

Now thats "purdy"
Old 01-19-2011, 09:21 PM
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Anyone know if any of these products would damage the valve seats or guides if I take my heads apart to clean them up?
Old 01-19-2011, 09:49 PM
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MetalWax will not harm any of the parts you've mentioned. It is not corrosive, but gloves should be worn. However, as mentioned, it cannot be used on pot-metal-will turn it black.
Metalwax.com
Old 01-21-2011, 12:33 AM
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Hot tank the parts/block.
Old 01-21-2011, 12:47 AM
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A soft wire wheel on a drill does the trick also.
Old 01-21-2011, 06:30 AM
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eastwood makes an amazing aluminum paint. that looks 100% factory to me, its a little expensive but goes a long way, I should post a pic of a waterpump I did that was clean but still dirty looking. One coat and it looked like I picked the part up from the gm parts counter
Old 01-21-2011, 11:33 AM
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Originally Posted by 1972nova
eastwood makes an amazing aluminum paint. that looks 100% factory to me, its a little expensive but goes a long way, I should post a pic of a waterpump I did that was clean but still dirty looking. One coat and it looked like I picked the part up from the gm parts counter
I totally agree on the look the paint produces but, look around locally for Dupli-color, Krylon, etc. Cheaper and is on the shelf at most auto parts stores, at least at local paint supply. It does make it look like it was never used.
Old 01-24-2011, 07:22 PM
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Some nice looking engine pictures for sure, but no junk yard is glass beading, hand brushing, or painting a motor to make it look pretty for the pictures. They need to do something quick and easy.

The Eagle and other products are safe for the not only the aluminum but all the plastic and wiring too?



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