83 MB 300 CDT Turbo Grommet - PeachParts Mercedes-Benz Forum

RogerB34 · #1 10-05-2010, 04:20 PM

Should the lower tube with the O ring be pushed into the oil pan or pulled up into the grommet?

Alternative grommet replacement is to pull the compressor housing to expose the lower drain tube. 6 compressor bolts of which the 6 oclock bolt is difficult. Use PB and break all bolts. Need a paper compressor gasket and two O rings. The 6 bolt must be turned out while pulling the housing forward. The upper tube is left in place. Reverse going in. Install requires patience on the 6 oclock bolt. Drop cloth needed to catch dropped bolts. Parts required are compressor paper gasket and two O rings. Clean aluminum surface. A cut in half 13mm helped. I used a little RTV to hold in place.
Done as part of turbo overhaul ************** kit. Time consuming for me. Very nice improvement engine response below 2000 rpm.

Bens lover · #2 10-05-2010, 04:28 PM

Should be pushed upwards.Its a bit tricky but take your time it will come out.
Cheers

Bens lover · #3 10-05-2010, 04:31 PM

Quote:

Originally Posted by RogerB34

Should the lower tube with the O ring be pushed into the oil pan or pulled up into the grommet?

Alternative grommet replacement is to pull the compressor housing to expose the lower drain tube. 6 compressor bolts of which the 6 oclock bolt is difficult. Use PB and break all bolts. Need a paper compressor gasket and two O rings. The 6 bolt must be turned out while pulling the housing forward. The upper tube is left in place. Reverse going in. Install requires patience on the 6 oclock bolt. Drop cloth needed to catch dropped bolts. Parts required are compressor paper gasket and two O rings. Clean aluminum surface. A cut in half 13mm helped. I used a little RTV to hold in place.
Done as part of turbo overhaul ************** kit. Time consuming for me. Very nice improvement engine response below 2000 rpm.

There is also this link that might help you.
http://benzguy.piczo.com/oilpanturbooilreturntubegrometandsealreplacement.?cr=7&linkvar=000044
Cheers

RogerB34 · #4 10-27-2010, 12:11 PM

Thanks for the boiling water suggestion to soften the grommet. My original repair leaked so did it again. I removed the turbo several times due to whine. The turbo wheel/shaft and compressor wheel required balancing. It was significantly out of balance. Still had the same whine issue on install of balanced turbo/compressor. Turbo tech retorqued the nut and the problem was solved. I used a 3/8 inch 6 inch box end to torque and had a little too much. The recommendation is 80 - 90 degrees tighten and alignment of balance marks shaft to compressor wheel.
Third grommet replace this year. First $150 leaked after 4 months. Found they used RTV. My second leaked. Third try went in properly. Recommend pushing the tube with the O ring down into to its seat, then slide the grommet down to seat. The O ring should be the primary seal. Test by leaving the grommet off and seating.
I prefer removal of the compressor housing and/or the center turbo section for the repair. Best done during turbo overhaul.