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Old 05-30-2012, 07:21 AM
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Magnaflux is used on iron heads the dye penetrate on aluminum heads though the dye penetrate will work on both..Some heads have a pipe plug instead of freeze any case clean the coolant passages as I am convinced the coolant passages can be plugged in some cases leading to overheat issues..Your methods should work fine..

I have tried most all of it and now do what is known to work..
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