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+--- Thread: OM617 HELP (/showthread.php?tid=7902)
OM617 HELP - Metzone - 11-14-2017
Hi
I am just starting to reassemble my oil lines etc. on my swap. See link http://www.superturbodiesel.com/std/showthread.php?tid=5847.
My question is this; next to the oil drainback for the turbo on the oil pan, there is another small tube for what appears to be another drainback. What is this for.
thanks
RE: OM617 HELP - R-3350 - 11-14-2017
ignore my post got the pan and filter housing mixed up.
RE: OM617 HELP - led-panzer - 11-14-2017
The little thing right next to the turbo drain is the drain for the stock air filter/oil separator
RE: OM617 HELP - Alec300SD - 11-14-2017
It is for the return of coalesced oil from the oil vapors that come out of the crankcase vent on top of the valve cover.
On a stock engines equipped with this fitting, the mist runs to the cyclonic oil seperator in the airbox.
The oil droplets get drained back to the engine via a fitted tube.
There is a one-way valve below that nipple on the sump to only allow the recovered oil to enter.
It sometimes gets plugged.
1) You can simply vent to atmosphere as some do,
2) or run a large oil catch can and use the drain as intended to take care of the oil mist that would otherwise coat your engine bay if you simply vent it to atmosphere,
3) or you can run the oil vapor to the exhaust pipe to burn it,
4) or do what MB did on the W116 300SDs and the 85 OM617 turbodiesels that don't have this fitting...the vapor is fed back the air filter on the horizontal portion of a T-hose fitting and droplets fall (and also get suctioned) into the vertical portion of the T-hose fitting on their way to the air duct connecting the airbox to the tubo inlet to eventually be burned by the engine (except for what ends up coating your intake manifold and intercooler if you install one later on).
Nice build, congrats on resuming your project.
I remember riding in the black Comet that my dad briefly had when I was a kid.
RE: OM617 HELP - Simpler=Better - 11-14-2017
Option #2 is messy but keeps the rust away
