Before & After - Cleaning Alum. Intake/389 GTO - Pontiac GTO Forum
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post #1 of 15 (permalink) Old 01-10-2017, 04:28 PM Thread Starter
 
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Before & After - Cleaning Alum. Intake/389 GTO

I'd read several posts about the best way to clean an aluminum intake and just wanted to pass on my experience for those who are interested. Since my intake was off the car it was relatively easy to try several recommendations and not worry about making a mess on the engine. I tried several products including carb cleaner, Brake Klean, Simple Clean. I applied each product and then scrubbed the intake with both brass and stainless steel brushes. After all that, I still was not satisfied. Then I tried Eagle 1 Mag wheel cleaner for cast aluminum wheels. It sprays on as a foam. I let it soak at least 30 seconds and then scrubbed with a nylon brush. Rinsed with water and then repeated the same process all over again. I dried it with a clean cloth and then used compressed air to blow out all the nooks. Attached are my before and after pics. Hopes this helps fellow GTO enthusiasts!
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post #2 of 15 (permalink) Old 01-10-2017, 07:12 PM
 
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Not bad. But, if you have a local engine builder nearby, glass beading the aluminum intake is the way to go.

Then get a clear topcoat designed for aluminum intakes and you'll be good.
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post #3 of 15 (permalink) Old 01-10-2017, 07:31 PM Thread Starter
 
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I really didn't want to spend the $ for glass beading but it may not be that expensive. I have not priced it, any idea of the cost? Also, I am leery of rattle can clear coats for two reasons. They can yellow with age and may not be gas resistant. Can you recommend a good clear coat brand? Thanks!
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post #4 of 15 (permalink) Old 01-10-2017, 08:27 PM
 
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Looks great!


Sent from my iPhone using Tapatalk
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post #5 of 15 (permalink) Old 01-11-2017, 09:01 AM
 
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Looks great, and for those of us on a budget, it's a great way to go. Thanks for sharing your discovery.
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post #6 of 15 (permalink) Old 01-11-2017, 09:47 AM
 
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Looks great at that price!
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post #7 of 15 (permalink) Old 01-11-2017, 09:51 AM
 
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Diamond clear bare metal formula should do the trick.
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post #8 of 15 (permalink) Old 01-11-2017, 05:33 PM
 
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Here is the Diamond Clear as referenced: Eastwood Diamond Clear Gloss for Bare Metal

I have not used the Diamond Clear, but it doesn't look bad, and looks to do the trick. I painted my brother's intake with simply a high temp clear. I know some clears yellow, but I felt it was still better than the intake oxidizing or picking up grease/gas stains and figured it might also clean-up better with an engine cleaner if it did get grungy.

Some people simply spray the intake silver. Eastwood also offers this: Aluma Blast Paint Aerosol 12 oz - Aerosol Paint - Acrylic Lacquer Paint - Eastwood
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post #9 of 15 (permalink) Old 01-11-2017, 08:24 PM Thread Starter
 
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Thanks!
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post #10 of 15 (permalink) Old 01-20-2017, 06:26 PM Thread Starter
 
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Before & After - Intake cleaning/389 GTO Continued...

Well... after further thought and consideration I found a local shop and paid $30 to get my aluminum intake bead blasted. It looks like new, see pics. Anyway, this is a good comparison of cleaning an intake with cleaners, mag wheel cleaner as compared to bead blasting. In my opinion it was worth $30 to make like new!
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