Hi folks,
The MB I have: '83 300SD 142K Mi Chassis W126 Engine: 617.95 Tranny: 722.3.
I have performed a full system leak test -- it holds vacuum well, about 0.2" Hg loss in ten minutes. The flaring at 2-3, which is not too bad, is occurring at ~5" Hg when acceleration is gradual. If I push the acceleration such that vacuum is less than 2" Hg, no flaring. It appears I am missing the first orifice (#62 on the vacuum line schematic) -- does anybody know what orifice size this is suppose to be?
Now, if I have plugged off the EGR valve, do the 3-2 valves now have a purpose? Looking at the vacuum diagram, I should by-pass them as well and avoid a potential source of leaks. No?
FYI, according to my MB dealership, the following orifices are no longer available in North America:
Red, 1.1 mm, PN 1162761029
Brown, 0.9mm PN 1162761429
White, 0.8mm PN 1162761229
This is my first exposure to the diesel engine -- loving it!

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Larry in Mobile, AL
'83 300SD "Goldfinger" 145K Mi W126 E-617.95 T-722.3 15" Bundts