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Old 04-30-2006 | 11:03 PM
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w8ye
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From: Shelby, OH
Default RE: Crankcase Casting Discoloration
Yes the water could have had a high PH and boiling made the reaction

House water usually is on the basic side of neutral PH.

Aluminum has to be treated with a very slightly acidic PH water to remain shiney.
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