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      12-03-2012, 07:18 PM   #9
dfjaws
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Drives: E90 M3 / E86 M Coupe
Join Date: Sep 2011
Location: Bloomington, IL

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I cleaned my own valves the hard way with copper brushes and carb cleaner. It took a while but overall it was worth it IMO. I ended up getting them just as clean as you would doing walnut blasting although I feel like walnut blasting would be much faster. I spent about 3 hours JUST scrubbing the valves. I was being a little OCD about how clean they were, haha.
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