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<p>[QUOTE=&quot;usmc60, post: 2358844, member: 76739&quot;]I agree with your observation of die distortion here&#039;s a couple more photos of another 87 with similar distortion my research indicates this is a foundry error in the metal composition another words a bad mix of metal at the foundry and any mechanic out there who&#039;s ever had to change a camshaft or crankshaft due to distortion knows exactly when a crankshaft goes out of round here is more photos of another 87P notice the marks on the back of the head are similar [ATTACH=full]480932[/ATTACH] [ATTACH=full]480933[/ATTACH] And on the reverse I would like to think these are stress fractures, This may not be proper language for what I am describing but I like to call this distorted bubbling defect on the hammer die due to molecule separation in the metal[/QUOTE]</p><p><br /></p>

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