It's not, and from the posts above I was told it was just a vent line.

It's an aluminum bodied servo too, and it works. If it's a vac issue within the servo I might just pounce on the Unwired Tools servo and be done with it....

There are 2 white vacuum lines. One is a vent! The other white line goes to the center vents and then goes to the CLOSED part of the defroster pod.

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

^ gotcha. That line does not get vacuum at all. Interesting that the defrost pod works perfectly but the center vent does not...

Okay I made more progress today. I replaced a vacuum connector and got the pod on the firewall to work! However the line going to the center vent still is not getting vacuum. I think somewhere along the line from the servo to the vac pod it's losing vacuum. I'm going to replace the whole line and see if that works.

That's good news! I finally got my vacuum system sorted and when I get my compressor working I'm either going with an aluminum servo or the UT kit. Both seem to have pros and cons...

__________________
My occupational hazard bein'
my occupation's just not around...
1980 300SD
1980 300SD

Look underneath the battery tray first , that's where I always find cracks in the plastic vacuum tubes , caused by dripping of battery acid .

You'll need to remove the batery tray to properly diagnose this but it's a simple job to do and your tray prolly needs de - rusting & re - painting ahyway .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

I finally FINALLY got the AC working properly today!! With R12 no less!!!

Here are my pressures at idle, do these seem correct?



50 Low and 230 High it seems, though the low side fluctuates between 40 and 50.

Still I'm getting 40* out the vents while moving, and about 48 when sitting still. Norm sure doesn't like having the bigger wheels and the compressor on though, I think I could run faster.

Still I'm happy, now to get all the vac pods working correctly.

How hot was it outside?

-J

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

95*, and according to the weather channel "feels like 101"

Does it get cold fast? or does it take a while to make 40 degrees out the vents?

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

To my eye those pressures are a bit high, but I'm sure vstech will say otherwise.

awesome, congrats Colin!

Want to fix my wagon now?

__________________


Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

Very good news! Keep plugging at the vacuum lines and it'll fall into place.

I printed out some vacuum schematics and colored in each "leg" of the circuits as I tested them. It helped me keep track of which lines I had checked. I had a couple of loose check valves and a bad fresh air element. Mine worked fine with both of the fresh air element lines plugged.

It helped me to separate the lines so I could see what was going on:



It also helped to use a little vacuum connector on the vac pump to check circuits:



I also found a leak in the servo vacuum switch which was screwing up my center vent flappage:



The Medusa like hoses were leaking so I replaced them...

Maybe this will help a little.

__________________
My occupational hazard bein'
my occupation's just not around...
1980 300SD
1980 300SD

I've only done one real "cool down" session so far. It took about 5 minutes to get it down to 40. While driving it it cooled down quicker, obviously, and held it's temperature.

I thought so too, but it is 2.6 pounds of R12 in there... Also it was hot, which I think has something to do with it. I'll recheck pressures tonight when it's cooler (relatively of course).

I'm at the point where I'm just going to order a dozen connectors, check valves, and whatever else I can find to make sure this system is working! Right now I have a thermometer jammed in to the vent which keeps the vents open.

Hogweed did send my a vacuum pod for the center flap since mine is leaking, but it has the wrong style attachment fitting. Mine is the one with the little pegs and those circular clips (I need to figure out how to get those off). Still, the diaphragm should swap in nicely.