White buildup in 3.8l cylinder heads

ezinaz

New member
Replacing my intake manifold gasket and see a white buildup in my cylinder heads...assuming this is where the coolant flows. Before i zip everything back up should i try to clean up the passageways with a brush and some sort of cleaner? Any suggestions on how to clean?
I'm considering just performing a coolant flush after putting it back together but also am considering cleaning it up by hand.
Any recommendations on how to resolve?
 

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