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Old 11-18-2017, 12:11 AM
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Join Date: Nov 2017
Location: Dallas, Txas
Posts: 63
Turbo oil drain tube sectional seal question

I am replacing all of the seals on my turbo drain tube and I am confused on whether to install the sectional seal on the oil pan first or slide it over the tube then install it into the top of the pan.

The shop manuals donít say and canít find answer on any of the forms. Iím in the middle of this project and Iím having serious difficulties with it.

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Old 11-18-2017, 12:43 AM
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Join Date: Nov 2013
Location: San Mateo, CA
Posts: 1,108
Here is one of the previous threads that should be helpful:

Diy...617 Diesel Turbo Drain Grommet Repair!
78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022
91 W126 300SE 'Kjetteri' new as of 02/19/2022
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Old 11-18-2017, 03:13 AM
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Join Date: Nov 2017
Location: Dallas, Txas
Posts: 63

I read how one guy did it shortly after posting
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Old 11-18-2017, 07:23 AM
t walgamuth's Avatar
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 38,296
Its a tricky little dude to get in there correctly and a pain to correct if it leaks.
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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Old 11-18-2017, 09:48 PM
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Join Date: Jun 2004
Location: West of Ft. Worth. TX
Posts: 4,186
I'm not sure what you are calling the sectional seal. The best method I've found is to install the turbo drain grommet on the lower portion and push it up a little ways. Then install the O-rings on each end.
To get the lower portion to seat, I used a socket and extension large enough to fit over the tube without damage then drive it into place. Place the upper portion onto the lower tube and push down all the way to enable you to tilt it into place and reattach to the turbo.
The last step is to push the turbo drain grommet down the pipe and seat it into place. A small crow foot or flare nut wrench helps to get it to seat. It helps to use plenty of assembly lube or even KY will do in a pinch.


84 300SD 350K+ miles ( Blue Belle )
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