I am reassembling a '82 300td block and may (or may not) have run into a snag. I installed new sleeves and had them bored and honed by a reputable machine shop to FSM specs. I did not replace wrist pins or pistons, but installed new rings and bearings,
On the #1 piston, there appears to be more of a gap to the front of the engine, and the piston, after torquing down the rod bearing cap, sits a tad proud toward the front of the engine (see pics). I removed the piston and reinstalled. No change. None of the other pistons do this and everything rotates freely without binding.
I noticed a bit of uneven wear on the piston, so for all I know this isn't new to the engine. Have any of you run into this issue before? What are the likely causes? I *think* I can eliminate poor alignment when boring - as best I can measure, the bore is square in the middle of the new sleeve.
I'm thinking a slightly bent rod or wrist pin. Or is this something that may align itself as the engine wears in?
08-07-2016, 02:38 PM
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