i just purchased a 300d turbo and i noticed the a/c only comes out the defrost and the side vents. under the hood by the brake booster there is a 3 way vacuum line in whick only one is hooked up and the other 2 are capped off. when i hook them up, the air switches over to the center vents as it should but i am no longer able to turn the car off. i quess the person prior to me adjusted the vacuum lines so the car would turn off but sacrificed the air going to the defrost. what is actually wrong so i can have it hooked up correct and also be able to turn the car off?

You'll probably get better replies in the Diesel Discussion forum, but it appears you have a vacuum leak. They are a pain in the a** to find, but at least you know where to start - somewhere downstream of the capped off lines. There is a vacuum diagram floating around on here somewhere. Maybe the DIY forum. GL

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1984 300TD

thanks

Bad vacuum pod somewhere in the climate control system. Lots of info on how to fix over on the diesel discussion. George Murphy can supply parts (search for his phone number). Could be simple or it could be a pain in the *ss to fix.

What color were the unhooked lines? If yellow, it could also be a leak in the door locking system.

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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

yellow is one of the lines and you are correct, the door locks dont work. the other is green. if i remember correctly, the green may have had a yellow strip on it.

The vacuum lines are color coded. the green vac line is for your climate control. under your dash there are about 5 to 6 vac pods that open and close various things to direct the air to the proper opening depending on the button pushed.

The two brown lines are to turn the engine off.
One line should be conected to the back of the Injection pump. there is a little can looking device which is a vac pod that pulls a little gizmo internaly that turns the fuel off.
Both lines are connected to the back if the ignition switch to a vac valve that is actuated when the key is turned.

The yellow pod is a check valve. one line going in, and two yellow lines coming out.
one line goes to the drivers door, which controls the other three doors, fuel door and trunk vac actuators. lift the carpet on the drivers side, and you will see some rubber "T`s" and vac lines,, yellow with red stripe (lock side) and yellow with green stripe (unlock side)

The other yellow line coming out of the check valve, runs to the back of the car, above the fuel tank. there is a black plastic tank that holds the vacuum only so the car can be locked and unlocked 6 to 10 times.

A Mity-Vac is something you will need to chase down these evel little gremlins that are a constant plague from time to time.

The large black vac line is connected to the Vacuum pump on the front on the engine. the other end is connected to the brake booster.
All these above vac lines get their source of vac from this line. be careful not to break off one of the little plastic nipples they connect to.
Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

excellent! that was very detailed. thanks again. i will be sure to investigate further on my next day off. you have been very helpful.