Carbonized upper plenum from '98 Blazer

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10-12-2009, 10:49 PM

bluiewest1

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Carbonized upper plenum from '98 Blazer

When I removed the upper plenum from the intake manifold, the inside of both was covered in varnish and/or carbon as was the spyder. What is the best method to remove the crud without damaging the plastic?

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