I am in the process of replacing the vac connections and such in the eng compartment of my 1987 300D turbo prior to jumping into the ACC system. The rubber vac connector going into this part is cracked. It seems like it is part of the unit (vacuum control unit?) I think this is a vac line to the passenger compartment. What is the unit and can i replace/fix the vac connection?

Thanks,

G

Attached Thumbnails

 

That is just a vent, it being cracked doesn't matter.

a - fresh air flow to car interior

__________________
68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i

This worked for me.

60x VCV vent hose fitting alternative

The way I fixed mine was to get a 1/8 hose mender...barbed fittings on either end with a flange in the middle. Attached this to the VCV with silicone goop. Then just used a right angle hose to connect to the pipe.

Attached Thumbnails

 

Mine is cracked too.

I repaired mine with HVAC foil tape.

As others have said, it is a vent to the cabin. Since it is there to relieve vacuum, it "sucks in" instead of "blowing out".

You don't want to run with it disconnected or leaky as it will draw dirty/wet air from under the hood into the valve and ruin it.

I like your idea mxfrank, I will pick one of those up in the home center next time I'm there.

__________________
The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech

thanks! I will look into getting one of those elbows.

G