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Old 06-17-2017, 11:05 PM
R-3350 R-3350 is offline
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Join Date: Jun 2015
Posts: 166
that early adapter worked for a while but i have since welded an AN10 bund into the side of the upper oil pan. as for the blow-by port i did some testing and found the stock port is too restrictive if you plan on running more than stock boost due to the ring end gaps being so loose on these engines. as such i drilled two holes in the upper plenum behind the oil separation baffle in the valve cover and ran two AN10 lines to a oil vapor separator which discharges into the bottom of the valve cover by the timing chain hump. the blow-by is the sent to an extractor venturi in my down pipe. something interesting to note is that a lot of the generic OM617 oil leaks stopped once i had done this it seems the stock case pressure management system is insufficient to prevent some build up and thus pushes some oil out various seals.
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1985 300D om617: 8mm M pump 175cc 5200rpm, holset he221w @ 30psi, large A2W ic, compounds on the way.
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