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#1
12-10-2012, 07:09 PM
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Vacuum shutoff not working
Just had a crazy thought. With the vacuum shut off issues you can have with older 123's etc how feasible is it to retrofit a manual shutoff from inside the cab like on the Pontons and Heckflossen? Perhaps even using some of those components. Crazy or doable?
- Peter
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2021 Chevrolet Spark Formerly... 2000 GMC Sonoma 1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021  2002 Kia Rio. Worst crap on four wheels 1981 240D 4spd stick. 389000 miles. 1984 123 200 1979 116 280S 1972 Cadillac Sedan DeVille 1971 108 280S 
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#2
12-10-2012, 08:22 PM
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I've been dealing with old MB's for over a decade now. some over 35 years old... none have any issues that can't be dealt with by fixing the leaks, or plugging systems that are not important that are leaking vacuum...
if it's not leaking vacuum, and the shut off is not working, it's an oil leak that needs to be taken care of, or a vacuum pump that needs repairing/replacing...
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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!
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#3
12-11-2012, 06:54 AM
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It'd be easier to run a vacuum hose directly from the shut off into the cabin where you could suck on it.
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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
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#4
12-11-2012, 02:36 PM
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...or just divert the fuel line inside the cabin and add on a great big tap - just think you could really impress passengers with one of these =>
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior  Don't leave that there - I'll take it to bits!
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#5
12-11-2012, 02:39 PM
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Quote:
 - Peter.
__________________
2021 Chevrolet Spark Formerly... 2000 GMC Sonoma 1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021 2002 Kia Rio. Worst crap on four wheels 1981 240D 4spd stick. 389000 miles. 1984 123 200 1979 116 280S 1972 Cadillac Sedan DeVille 1971 108 280S
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#6
12-12-2012, 12:31 AM
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ahh but you can at Home Depot
I've been tinkering with mine ever since I lost my keys way back when. I've built a "flip a switch" start system and the vacuum was a big issue until I realized I needed one of these(I think this was what I got, but it's the idea that is at hand) from Home Depot:
Watts 1/4 in. Brass Compression Angle Needle Valve What I did was attach the black MB hoses to each end of the HD needle valve, both of which have a brass nipple that is semi-airtight, and made sure it was air tight by putting a sealant where the hose nipples and hoses meet the fitting. That part is important. Now all I have to do is close it, one half turn or so, when I want to start/run it and open it, back the same half turn, when I want to stop. This mimics the MB part and what it does when engaged or not engaged. When the car is running or starting, the MB ignition vacuum, which is simply pushed in by the keys movement, blocks air from flowing through. When one turns off their car, the button pops back out and air can flow between the hoses and the car shuts off. At least that's what I realized in my tests. If you think I'm crazy, and yes I am, test the part out yourself. Blow in one of the holes when the button is pushed in(i.e. when the ignition is on) and blow on one when the button is released. There probably is a better way to rig it, but this works just fine and cost me 7.87 and got me to flip a switch starting. I got rid of my whole ignition system from the key insert down until I connected the wires. No more damn keys, no steering lock, and no more interior ignition issues. I put a clock where the key once went and if some thief can figure out how to start it, god bless them. P.S. To any thief, I live in Rural China and my car is polka dot pink.
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