I'm have a lot of oily gunk collecting on my breather line, especially where it enters the oil pan. I see at the top, where the line fits into the bottom of the air cleaner housing, is a chewed up oring and I suppose there is another oring where the line enters the oil pan? Is this correct? When I remove the air cleaner housing, can I just lift up the entire breather line and pull it from the oil pan? Is there an oring on the oil pan side, similar to the way one is used on the air cleaner housing side? Any idea what size orings these are supposed to be (metric no doubt)?

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1985 300D 231K anthracite grey w/black int.

Yes. Both are the same size. The tube is for draining oil back to the crankcase; it's not a "breather."

The two o-rings are the same size as the o-ring on your oil dipstick, if that helps.

the line is held in place with a clamp behind the turbo- kind of a PITA to get at. I dont know the size, but I have a cheeepo $5 metric oring assortment from mcparts and it had what I needed- very handy to keep around.

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1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.

thanks for the info, good to know the oil dipstick oring is the same size. I'll take a look at my dipstick oring, figure out the size and get some replacements before I pull off the oil blow-by return line to replace those orings.

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1985 300D 231K anthracite grey w/black int.