Knocked off several vacuum hoses! - PeachParts Mercedes-Benz Forum

spyguy · #1 05-20-2006, 01:05 AM

In the process of doing the gaskets on my oil filter stand (man what a job that was), I accidentily disconnected several vaccum lines. I can't figure out where they go so what do I do? BTW I now know you can't shut down a 300D with said hoses off.
HELP

Hit Man X · #2 05-20-2006, 01:11 AM

You can push the manual stop lever.

Can you provide a picture to us of what ya knocked off?

spyguy · #3 05-20-2006, 02:11 AM

Right at the firewall where the power brake assist is located, there are a number of different color tubes that have become disconected. Also a black poly tube about a foot long seems to have completely pulled out from where it was attached in or through the firewall. Another thin tube also pulled through. It is also about a foot long. BTW where is the manual cut off switch?

Hit Man X · #4 05-20-2006, 02:20 AM

I can go snap a pic of mine for you if that'll help? I have removed all the emission crap but you should get the idea I think

The manual stop lever is on the IP, it's red and says STOP on it I recall. Right around the fourth injector.

spyguy · #5 05-20-2006, 11:15 AM

A photo may help. I'll take any help I can get on this. Obviously I pulled some things apart so not only do I need to know where things go but I think I will also need some little tubes and hoses. I have found a few vac diagrams but they all seem a little incomplete-I'll study them some more. Any further tips on diagrams or should I bite the bullett and find a guy that can fix this?

spyguy · #6 05-20-2006, 01:06 PM

I have found several diagrams for the vac system but none of them seem to be for my particular California car. Any tips on where I can get the right diagram? It seems most of the diagrams show the major components but often show open ends that are not completed to their end device.

dieseldiehard · #7 05-20-2006, 01:31 PM

there are one or in some cars two vent lines with open ends, They go to the atmosphere to vent some device on the engine and the theory MB had was to pull air from inside the car rather than under the hood where its probably dirty. The vent lines are always black.
There are two lines that go (went) to the yellow one way (check) valve and drive the CLS (central locking system) and control pods for the A/C. You may need to find a similar car and do an eyeball comparison.
Now you know one reason some JiffyLubes mandated a NO MERCEDES DIESEL policy! they mucked up more than few cars and their insurance bought some new engines after the owners drove out and lost all the oil due to something the oil changer tech did wrong

Your back is probably real tired from replacing the stand gasket, so just try some vac lines and see if you get it right, its the transmission vac line that some people accidentally yank loose (then you have neck wrenching shifts)

Hit Man X · #8 05-20-2006, 02:04 PM

I'll go snap some pics. Gimme about 10min to take them, transfer, and upload.

Hit Man X · #9 05-20-2006, 03:03 PM

Hopefully these will help, lemme know if you need more pictures.

Sorry it took so long, damned Photobucket went offline to update in the middle of Saturday afternoon.

Please disregard that nasty 134A fitting, I did NOT install it.

spyguy · #10 05-20-2006, 04:39 PM

Much thanks for the pix. Hopefully later today I'll get a chance to try to figure out a little more. It does appear your car may be slightly different than mine but hopefully I can still get it worked out.

Hit Man X · #11 05-20-2006, 04:41 PM

Could be that I have a 126 SD also and I have removed my emission stuff, so it should at least give you an idea.

spyguy · #12 05-20-2006, 08:44 PM

Well I have been looking over the situation and I'm not making too much progress. I did find a nipple broken off on the metering valve on the main vac line. That's easy with a new part. The rest of it isn't so easy. As best I can tell, several connections were not right even prior to my knocking things apart. At least that is my assessment going by the diagram found afixed to the car. Maybe the strangest situation is a black poly tube about 1 foot long and about 5mm diameter going thru the firewall. I noticed it pulled out with little or no resistance. I also pulled another small black tube out the same way. I pulled the panel off under the drivers side to see if I could find where they came from but couldn't find the place of connection...soooo I'm still quite puzzled. I hate to say it but I may have to break down and find a mechanic who has the ability to put it back in shape and have it done.

#13 05-20-2006, 08:50 PM

Quote:

Originally Posted by spyguy

Maybe the strangest situation is a black poly tube about 1 foot long and about 5mm diameter going thru the firewall. I noticed it pulled out with little or no resistance. I also pulled another small black tube out the same way. I pulled the panel off under the drivers side to see if I could find where they came from but couldn't find the place of connection...soooo I'm still quite puzzled. I hate to say it but I may have to break down and find a mechanic who has the ability to put it back in shape and have it done.

There is a black line that is supposed to be open under the dash. It doesn't connect to anything, it's a vent line.

#14 05-20-2006, 08:54 PM

I assume you've already looked at these vacuum diagrams?

http://www.peachparts.com/shopforum/showthread.php?t=105297

Hit Man X · #15 05-20-2006, 09:08 PM

Quote:

Originally Posted by Craig

There is a black line that is supposed to be open under the dash. It doesn't connect to anything, it's a vent line.

Yup, came to a big filter. That's gone on mine too, I wish I had better pics for the problem. You should see under my SDL, it's very limited with the vac lines.