I'm almost to the reassembly portion of my OM617 rebuild and about to start balancing my pistons. 4 of them are from the 1985 block and have thinner piston skirts, and one is from an earlier engine and has a thicker skirt.

The weight difference between the old style and new style is ~20 grams. What is an acceptable weight difference on pistons in these engines?

Didn't realize I had different pistons until I started cleaning them up. I don't want to have excessive vibration or wear, hopefully I can get enough weight shaved off of the heavier piston without compromising it's structural integrity.

Thanks
Max

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Milan Brown 1979 240D, rebuilt OM617.952 turbo diesel, rebuilt 722.315 transmission - engine spun a rod bearing, sold to pick your part

1979 300SD, ~90k original miles, all stock