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Old 03-11-2010, 01:44 PM
  #3  
Edwin
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Location: Leander, TX
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Default RE: cleaning old engine

What he said. I do the same. Sometimes there will be a spot or two that stubborn but a little tooth brush or wire brush action solves that. Dont leave it in for too long. I did that for about 4 days and the aluminum turned dark grey. Doesnt affect the running, just appearance.
Edwin