Oil drain plumbing

[Rossroams]

Hey, so after installing my turbo I noticed oil puking from the CDR drain. I poked holes into it before, but it seems to backflow. Are there 2 layers of the splash guard?

 

[OLDBULL8]

Sometimes it's helpful to know what truck you have.

 

[Rossroams]

Oh sorry man, it's a 1987 6.9 IDI f250, with headstuds.

 

[laserjock]

Yes I’m pretty sure there are 2 layers.

 

[gfemling]

I just installed a new valley pan on my 6.9 with HyperMax turbo setup and examined the drain/ baffle config to assess need to add more drain holes below the turbo oil drain- I realize not CDR but reuses same hole in valley pan. Confirm there are 2 layers but the lower layer has an open aft edge so it should drain unrestricted; the upper layer had several- 4 if I remember correctly- maybe 1/4” drain holes which seemed quite possible to partially get obstructed by “carbon” over time so did add more punches drain holes thru top/ 1st layer.
But, and this may not apply to your CDR drain issue, I discovered when I installed the HyperMax turbo oil drain that the flat end of the drain hard tube, which slides down into tho original CDR hole in valley pan- was sitting flat and hard onto the surface of the upper valley pan layer. So I ended up punching the holes thru the top layer immediately below the grommet anyway to ensure drain down of oil flow. Maybe or maybe not your situation but just pointing out a possible aspect to consider.

 

[frankenwrench]

Just installed stock ATS 093 turbo on my 6.9 had same issue. Took all back apart and removed intake pan to find that the drain holes were carboned up a touch and had a spare anyway so cut bottom baffle off completely and left top baffle there and installed the new and moddified pan and reinstalled the turbo. Haven't had that issue since. But my oil drain doesn't sit flush with the top baffle.... Maybe just the difference between my setup and hypermax?

 

[Rossroams]

Well I took it out and punched a few more holes into it. Now with the H1C and flexible oil drain installed it seems to be draining. I've had no leaks yet... except for a return line, again.