I found information on servicing the ALDA, by cleaning the banjo bolt on the rear of the exaust manifold, that leads to the switchover valve. I first checked this bolt on my 80 300SD since I'm parting it out, to mkae sure I could remove it without causing harm. It was surprisingly clean. So whats confusing me is that when I checked this bolt on my 79 300SD it was half the length as the one I pulled out of the 80, which looked just like all the photos I've seen. Can anyone tell me if this should, or should not be so? Any info on this subject is helpful. Thanks!

Its fine. The 79 was clean because it has no EGR to make sludge in the intake.

and, it's on the back of the intake manifold, not exhaust...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

right, intake manifold. My concern isnt that the 79's banjo bolt was clean, the 80's was almost as clean. My concern is that the banjo bolt on my 79 is half the length of the bolt in the pictures, and the one in my 80.

This might be for another thread, but I also noticed that some of my coolant lines are bypassing a box/housing that sits in the rear left corner of the engine compartment. I'll take a picture and post it since I'm actually unsure of its purpose.

Ignorance is bliss. Knowledge is suffering. Should you wish to suffer, do a search on 'servo' or 'evil servo'. (That is if you really meant rear right corner)

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

so is what I'm looking at someones attempt to bypass the servo?



The circled areas are where the coolant lines should be connected I'm assuming, since they are connected on my 80.