Awhile ago I posted about "a horrible clanking noise", I found out what happened and today I just got the truck running again. 1 new piston and a pair of valves (plus all the gaskets and such to get there and back). Anyway something got into cylinder #2 and chewed up and cracked the piston, and bent both valves. This engine had less than 3K on a long block. But being as just over a year the warranty was expired. Besides the "Premium rebuild" was just BS, and I would not want any more dealings with them. So what could the object have been? The remnants I found in the turbo (exhaust side), with no visible damage to the turbo. The pieces are metallic, attract to a magnet and have rounded edges. I am sure that if it was a nut or bolt it would not have been so crumbled. If it were a hard brittle piece it would not have the rounded edges. In my mind that leaves a cast piece? I saw nothing missing from the cast head, and between the head and turbo is only aluminum, Since the compressor vanes on the turbo have no marks on them I'm sure it came post turbo. But what, and how? If it was a fastener or tool, I could see that in my assembly and install I had somehow dropped it in unnoticed in the intake plenum. I am certain though it is not a fastener or tool. Any ideas?
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