1991 350 SDL 602 eng. As I was installing shocks I noticed this linkage that appears to be coming from the wastegate controller?(black item in the one pic) The linkage will not reach the pivot arm that its suppose to attach to. Can someone educate me on this lever and linkage, and it purpose in life. I assume it has been this way since I purchased the car.

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I LOVE CATS....AND FRIES

1981 300sd
1983 300sd
1985 300d
1983 300cd
1991 350sdl

Turbo boost dump. If the boost exceeds about 13 psi it opens a valve and vents the boost back into the exhaust system. Prevents overboosting the engine; there's also an overboost protection solenoid in the intake manifold that closes the connection between the manifold and the ALDA so that the extra fuel given under boost is cut off.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

So it being unhooked was more than likely done intentionally by the PO. And it cannot effect performance? right

__________________

I LOVE CATS....AND FRIES

1981 300sd
1983 300sd
1985 300d
1983 300cd
1991 350sdl

Correct. OTOH, if your overboost protection solenoid also fails, the engine could blow up. That would affect performance.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

If you ever get into a runaway diesel situation you're screwed without the dump.

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http://i284.photobucket.com/albums/l...aman/Fleet.jpg

Peach Parts W124.128 User Group.

80 280SL
85 300SD
87 300TD
92 300D 2.5 Turbo
92 300TE 4Matic

I think even with the dump, you're screwed with a runaway motor.

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

I'm a bit confused... you say this is a 602 motor not a 603? That's the wastegate... with the arm unhooked like that I would think the wastegate would be "flopping in the wind" and you wouldn't make any boost.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

The accordion section and trap replacement pipe make this a 603.96 or .970. 602 doesn't have either. .970 is consistent with a '91 350SDL.

Sixto
87 300D