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Oil in vacuum line
Hello all,
I was helping my friend with a 1980 300D change out the diaphram on the vacuum pod for the center vents when I discovered there is oil in the vacuum lines. He also stated that he had some oil ruin his shoes while driving. I suspect it came from the vent line that runs under the steering column. Do any of you know what can be the cause of this? One more thing, the pod worked great with the mityvac but now we find that there is no vacuum in the lines to the pod when the car is running.. what else can be wrong?..? Thanks Richard |
#2
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Check the fuel shutoff diaphram on the rear if the Injection pump with your vacuum tester.
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine |
#3
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This is the usual culprit.
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1984 300D Turbo Diesel - 211700+ mileage (now sold) http://www.maj.com/gallery/Ned/benz/sig.jpg In any of my posts, it is safe to assume that I'm talking about this car. |
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Thanks for the info. Is the fuel shutoff the metal round thing at the end of the IP? If it is the problem, do you replace the whole shutoff?
Thanks again. |
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The search function is a wonderful thing......
http://www.peachparts.com/shopforum/showthread.php?t=163498&highlight=shutoff You are going to need to loosen the vac line at the brake booster and make sure there isn't oil down inside of it. If so, you need to suck it out with something......
__________________
Jimmy L. '05 Acura TL 6MT 2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China" Scar engine installed '81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John |
#6
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Booster: check only if you have been loosing brake fluid without any noticable drips. Buy a new 'o' ring first! Often you can leave the lines on the MC, unbolt the MC & slide/pull it forward enough to check if brake fluid is flooding the booster.
Do a search on diesel vacuum pump & you will find a few posts on bad pumps putting oil in the lines. I'd jerk the large black line & look for oil & verify the check valve condition. |
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You might have a read through dieselgiants shutoff valve repair.
http://dieselgiant.com/repairyourshutoffvalve.htm If you aren't getting vac to the pods you have leak somewhere up stream of that. It may be as simple as a connector, or something a little more difficult like repairing/replacing the vac pump. You'll have to go through the system with the mity vac.
__________________
Andrew '04 Jetta TDI Wagon '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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Richard - I too vote for the notion that it's a leaking...
... a leaking IP shut-off diaphragm. Additionally I recommend that you also purchase a couple of in-line fuel filters and:
(1) Mount one in the engine compartment where it is readily visible... in the vacuum line that runs from the IP shut-off valve to through the firewall, and (2) Mount the other under the dash on the intake of the vent line to prevent dust/dirt/crud from entering the vacuum system. Sam |
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Quote:
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cdplayer
My first MB was a 1980 300CD. I first noticed oil inside the airbreather canister. I had oil in several vac. pods and in the brake booster too. What a mess. Turns out for me the vacuum pump diaphram had ruptured.
The diaphram was an easy fix. Got several extras at the junk yard. Cleaning the pods, and the lines took some time. Hope this helps. |
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Possibly coming from the speed head/cable connection??
We saw that on about an '81 I think,at the Indy MBZ shop I was service writing at for about 6 mos. Leaked right on to the customers shoe!! Get up under there with a light and check it out.
__________________
1982 MBZ 300SD Turbo Diesel- just turned 200,000- just breaking her in |
#12
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Cheap but clear filters that fit is what you want...
Quote:
[B] On the VCV vent line - This one on the vent line under the dash is strictly to prevent dirt and other "stuff" from being sucked into the vacuum line, on to the VCV and the rest of the system that controls shifting and EGR actuation. Sam Ross |
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oil pressure gauge?
How about oil leaking from the oil pressure gauge everywhere behind the instrument panel, being ignored for too long, and getting sucked into the system at the (leaky) ignition switch vacuum lines? I think this is what happened on my car. I have oil in my climate control lines too, but my IP shutoff works and holds vacuum. My vacuum pump pulls a 20 or so. What a mess. I still have to find a way to get all that oil out of the lines.
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Quote:
Quote:
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#15
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Quote:
**edit** Here you go: http://www.peachparts.com/shopforum/showthread.php?t=126051&highlight=shutoff
__________________
Jimmy L. '05 Acura TL 6MT 2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China" Scar engine installed '81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John |
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