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Discussion Starter #1
Recently I cleaned up the outside of the engine block and took off the oil pan. There seems to be some discoloration on the girdle:



Is this a sign of abnormal heat damage? Should I be worried about this or is it just normal wear and tear?
 

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Discussion Starter #6
Phew...thanks! I keep thinking somethings got to be wrong with this block, but I guess that's just based on how clueless I was when I bought it. :sweatdrop:
 

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A friend of mine got a D15B from a supplier in Seattle that the oil had solidified and when we pulled the pan, there was an imprint of the crank and girdle in the "oil". That one could have used more frequent oil changes, but it looks fine.
 

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Aluminum doesn't change its color at any temperature. Even fully melt liquid aluminum is just matte grey in color.
 
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