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Originally Posted by tqtran
Are you referring to the "slip sleeve" problem? I've never heard of it as the "seconds blocks".
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It was covered in the April '05 issue of Panorama magazine in the Tech Q&A section. "Not quite perfect blocks" is the description they used in the article. The manufacturer of the blocks' (Kolbenschmidt) casting machine broke down in their factory so they bored out and sleeved the not quite perfect blocks because Boxster production would have slowed tremendously. Liners were pressed in to repair the blocks and several were pressed in harder than the top retaining ring could handle so the ring would crack underneath. When the ring fails during engine operation, pieces fall into the cylinder, the piston rings grab the debris and that's all she wrote.
The casting machine was down from 10/98- "early '99" so that's why I'd stay away from those build dates.