Need a little help rebuilding a Garrett turbo on an OM617 1982 300SD. Please see attached picture.

I’ve removed the six “1” bolts, the four “2” bolts, and four of the six “3” bolts (3b, 3c, and if you imagine them continuing around the far side, 3e and 3f). Anyone who’s done this knows the remaining two “3” bolts (3a and 3d) are blocked by the oil inlet and oil drain flanges and cannot be removed without separating connector housing “C” from exhaust turbine housing “D.”

I’ve also separated the intake/compressor housing “A” from the component labeled “B,” exposing the compressor fan blade and the 10 mm 12-sided nut holding the blade on the shaft (not visible in pic). I have not removed the four “4” bolts; that would permit separation of housing “D” and exhaust connector “E,” but it would yield no benefit other than allowing easier access to the nut on the exhaust end of the shaft (“5”).

If I unscrew the two remaining “3” bolts (3a and 3d) until they touch the oil flanges on connector housing C, and then unscrew more, it looks like they will push housings C and D apart. The problem is, it feels like that also puts increasing pressure on the compressor fan blade.

So my question is this: Do I first have to remove the compressor fan blade and/or the exhaust fan blade from the shaft, or will separating C and D cause the entire shaft assembly with both fan blades to come out with the B/C housing?

Incidentally, the nut on the exhaust end of the shaft looks like a hex nut with one point removed—sort of like a baseball home plate. A 14 mm socket will fit, but it slips off when I use it to hold that end of the shaft tight while removing the nut from the intake end of the shaft. I’m also told the nut on the exhaust end has an opposite-handed thread. Any suggestions on how to get the shaft assembly apart? Or do I not need to?

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