There's no point in touching the bottom end, it's not even broken in yet and just a waste of money. The ring seal on these engines are good for 300k+ with proper maintenance. Do the rear main seal and do whatever else you gotta do and call it a day.

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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k

You could even do the rope seal without removing the crank (I posted a thread here somewhere). If it is too late for that, the rebuild is probably going to happen. As said, one size over piston/ring/pin assemblies are available, and are the best way to go vs using the old pistons and sleeving the block.

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All Diesel Fleet
1985 R107 300SLD TURBODIESEL
2005 E320 CDI (daily)

LOTS of parts for sale!


EGR block kit
http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html

1985 CA emissions 617 owners- You Need This!
Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst.

Sanden Instalation Guide (post 11):
http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html