I alraedy have three new filter and two cases of oil and will change the oil three times in the first 1000 miles to be safe. I really don't think grit material got in the engine. I was extra caerful and used a tape and a shop vacuum to block the water and oil holes.
I will the oil pan tomorrow. Is it possible to spray inbetween the piston and piston bore with a cleaner. I am istalling a new oil pump and chain. I have noticed a big oil spot on the block wall below the exhaust manifold for cylinders 4,5, and 6 and also in the back of the head which suggests a leaking head gasket. The machine shop also mentioned that the head was slightly worped in the middle and they machined 0.007 of an inch off the head surface.
1993 190E 2.6
Advanced Diesel Systems Test and Research Engineer