I am doing some modes on my 603 (adding an water/air intercooler and such) and need some room under the hood of my G300. The factory turbo inlet housing has the, (now plugged) pollution control unit built into the inlet housing. I would like to find one without this. This is a new turbo from the factory so I don't really want to replace the whole turbo just the inlet housing.
(photos are examples for reference)
Any suggestions would be appreciated.

Thanks
Mark

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91 300GD SWB with transplanted 87 OM603 turbo motor

Do you have any more side shots of that "thing"? I have never seen something like that, it almost looks like a wastegate actuator or some such thing.

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

Standard issue 1987 MB

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91 300GD SWB with transplanted 87 OM603 turbo motor

Its a recirc aka bypass valve. Not really emissions related.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

Thanks for clarifying.

If you need clearance I'd braze a plate in the opening and cut off any excess. "Alladin" white metal rods can be used to braze aluminum with a regular old MAPP gas torch(probably propane too if you're patient).

FYI-the alladin rods work well if you prep the surface with lye and a stainless wire brush immediately before brazing.

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

Thanks for the suggestion I may give it a try if I can't find a replacement housing.
Non of the euro turbos have this attachment.

I opted to remove the offending protrusion and make a cover plate.


Took a run to Asheville NC for the Overland Expo.
Drove perfectly.


Thanks for all the suggestions.

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91 300GD SWB with transplanted 87 OM603 turbo motor

A little muddy. Hurricane off the east coast

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91 300GD SWB with transplanted 87 OM603 turbo motor