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Vacuum pump oil leak
Hello,
Sorry I tired some searching, but could not easily find my answer. My 77 300D, new to me, has a oil leak on the vacuum pump. I noticed this leak coming down the block. As well on the output pressure side there is some oil coming out. In fact my airfilter is very oiled up. But not soaking. Just damp. Is it normal for the oil to come out of here? Or do I have a seal or gasket gone? I appreciate your help, thanks.
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77 300D- new to me, lots of "issues" to deal with. But a nice unit. Diesel man- 84 Toyota Diesel cruiser |
#2
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anybody?
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77 300D- new to me, lots of "issues" to deal with. But a nice unit. Diesel man- 84 Toyota Diesel cruiser |
#3
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You need to rebuild your pump, I would guess. That older style is an easy job. Just be sure not to over tighten the diaphragm bolt. Also check the little roller and make sure it is 100% OK. Do a search and you'll find plenty of info on doing the job. You don't want too delay this job too long as oil in the vacuum lines is not a good thing and can damage your starter switch, which is a bugger to replace.
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1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car" |
#4
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Bad diaphragm in the pump sucks oil into the air filter housing via the clear or white hose from the pump to the air filter. That hose should have no oil in it.
Like Stevo says, rebuild the pump.
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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 |
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Thanks for the info guys,
now when I search in the benz bin or this sites parts area I get asked which engine series I have: either 12-108988- or -12-108987 the kits are different. I have a 300D 1977 model diesel. How do I know which kit is my kit I need? Thanks for the help, Darryl
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77 300D- new to me, lots of "issues" to deal with. But a nice unit. Diesel man- 84 Toyota Diesel cruiser |
#6
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This pump rebuild is an easy job.
Done it a few times. Usually the VIN number identifies the cut off for those various kits. |
#7
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Darryl
Your kit is the cheaper one, (early) The one with the diaphragm. As I remember the 2 check valves come separate, I would change those out as long as your in there. Keep the old ones for spares if there any good. When you reinstall the pump, hand rotate the engine so the LOWS on the "roller coster" track are "up & down" , you'll see what I mean when you get in there.
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1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car" |
#8
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do not drive your car
In this condition
This is one of the things that causes run away engine Run away diesel, why does it happen? Run away diesel, why does it happen?
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Jason Green 1977 240D AUTOMATIC the Beast 1974 Super Beetle Suppose you were an idiot. And suppose you were a member of Congress. But I repeat myself. - Mark Twain, a Biography Last edited by whunter; 01-26-2011 at 12:53 AM. Reason: repair link |
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