hello,

i recently aquired a '79 240 D. I love it so far.

the engine will not die when i turn off the key. sometimes it dies 30 seconds later, sometimes i must lift the hood and press the "stop" lever. any suggestions?

the manual transmission: the owners manual calls for 10W/20 or W020. I've seen people online state that it is W-30. I want to stick with what the old owners manual states, and i can purchase this. any suggestions?

i sure appreciate it.

Guy

You've got a vacuum leak somewhere. If you don't own a MityVac diagnostic tool, get one and start testing. This has been *exhaustively* covered on the forum in various places; just do a search for vacuum leak. Look under the hood for obviously broken, cracked, unplugged vacuum lines and determine (if you can) where they go.

__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL

Michael

thanks so much. i know how these things can be extremely covered. i will do a search. if you would enlighten me a little, i do have a mighty vac and can test for leak down. where are vacuum lines? i've only seen the ones coming from the pump to the power steering and power brakes. don't know about any sort of engine shut off thing.

thanks a bunch!

Guy

No vac to power steering. You need to look for the small lines.

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

Small brown vacuum line going down to the shut off valve on the back of the injection pump down between the pump and the oil filter housing. Remove that brown line. Plug in your Mity Vac to that shut off valve. With the engine running, pump up some vacuum. If the engine shuts down smartly, the shut off diaphragm is intact and you have a vacuum leak. If it doesn't shut down and you suck up some nasty black oil into your mity vac, the diaphragm is ruptured and you'll need to replace the shut off valve.

__________________
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

thanks people. i will try vacuum at the brown line.

possibly another question... i don't think it's vacuum, i'm thinking temperature switch... there is a post sticking out behind the thermostat housing. there is nothing there. is that possibly something that should be connected to the electric fan? the temp switch on the dash works, so this is all i can think of. if no reply, i will ask to the whole forum

thanks for helping people

Guy

No connection between the temp sensors and shut down system. What's the 'temp switch'?

__________________
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

Go to the first page of the diesel discussion...there is a sticky for the vacuum lines. Usually the door locks and or the vacuum for the trunk or gas flap have leaks, if you can plug the line that "v's" off and goes to the door locks, this might help with the shut down, mine is plugged off and the shut down works now. A golf tee works well to plug the lines.
The door lock vacuum lines usually go into a plastic round piece that has 2 vacuum lines running off of it. Usually up near the brake booster close to the fire wall, mine is yellow. Plug that see if it helps, post back let us know what works

thanks kerry. i will check this out more for sure. do you know how it connects? i just see a post coming out. maybe it was a push-on, socket (like the opposite side of the bullet type connectors).

i sure thank you

Oh, another thing i just noticed (why i came back so fast to the forum) is that on top of the IP there is a vacuum canister as well. this one is disconnected, and i see no near vacuum line. do you know what it is and where it should connect?

It's a push on connector and on my 116 the wire comes forward towards the radiator but I can't recall exactly where it connects.

That device is the ADA. (not ALDA). It compensates the fuel flow on the basis of altitude. It should be open to atmosphere. No hose attached. (as long as you are referring to the metal device and not the white plastic device which should have vacuum hoses attached. The white device is the VCV--vacuum control valve for the transmission.)

__________________
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

thanks kerry, i think that's all i need to know, my wire goes forward too and dissappears, it appears it does to to the fan however. weird they wired it that way. i will double-check. since nothing is hooked to the thermostat switch, i imagine that's it. haven't heard the fan come on when the engine is warm. never seen it go above 175 so that's probabaly a good sign it's all ok.

I checked my 85TD. The wire off the thermostat housing does not come forward. It goes into the harness on the right inner fender.

__________________
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

Thanks. perhaps sometime i'll find out where it's supposed to go. for now, i will leave it. i found out that it looks like it will run only with A/C which is broken anyway. at least the main mechanical fan works.

i sure appreciate it. my next question i'm about to post, perhaps you can help me with too. i'm so appreciative of your help, what would we do without these forums. i have a F250 PS SD that i have gained and shared lots of info on.

ok, here's my question... under the battery, there is a vacuum tube coming from the firewall. It is broken (burndt?) and i have no idea where that ones goes. any suggestions?

Thanks!

Guy

No idea. Is it colored hard plastic?

__________________
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

Just patch in a new section of hose with the appropiate connectors. That if the old one is burnt open to the atmosphere. It probably does something and by the same token is probably not important to trace it to the sources if difficult to locate. Or if you really want to find the function get a shop manual.