While replacing a glow plug, one of my plastic fuel lines snaped. No problem, i order the fuel line, eventually get the right one, and a month later i get the fuel line replaced. while installing the new fuel line, my old brittle plastic vacum line from the vacum pump to the air filter snaps. I'm in a hurry here, so does anyone see a problem with using a rubber fuel or vacum line if i can find one with the right Inside Diameter? i've got to get this thing back on the road.

this is on a 78 240d

Sounds reasonable if you get a snug fit. You can also use some RTV around the outside of your vacuum line to help seal the patch if the ID is a little too large. Don't use any RTV on the inside of the rubber hose, though, or you're likely to plug the vacuum line. Sounds like it's time to replace that line, too. Good luck!

On vacuum lines, any rubber hose that will not collapse when subjected to vacuum is ok.

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1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

Anybody have a source for that hard plastic vacuum line? The line to my fuel cutoff is spliced in two places, and the shutoff is erratic.

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1982 300SD

Talk to Phill at Fastlane.....he carries it and sells it by the meter.

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

I broke the lines off of the check valve on mine..right by the brake booster (the hard POS line) Replaced it with some rigid 1/2 tubing and used hose barbs and a nifty 1/4 NPT push-lock to make my new connections..looks real clean..as for the ports on the check valve, just put a dribble of RTV over the holes and called it good. no leaks

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1992 300TE 4matic - Just obtained 12/22/06
1983 300D - SOLD
1997 Dodge 2500 - CTD 400+HP, 1100ft/lbs torque

Aren't these hard thin vacuum lines generally available from most auto supply stores?

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95 E320 Cabriolet, 159K