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  #1  
Old 05-20-2015, 11:41 AM
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Injection pump when add lubricate oil, smokes

Have a 76 240d. When I add oil to the Injection pump, the engine revs about half pedal, blows out tons of oil smoke until the oil level goes down in the IP pump.
Is this normal? How can it burn oil from the oil reservoir of the IP pump?

Could the leather diaphragm in the pump be torn and somehow causing this?
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1976 240d
1995 e300d
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  #2  
Old 05-20-2015, 01:34 PM
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Join Date: Oct 2007
Location: iowa
Posts: 168
The diaphragm was my problem with the same symtoms. I'll ad that mine always idled high (1100-1500 rpm)

I think that is the only thing that can cause you issues.
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Dave

1985 190D 2.2 auto--gone
1975 240D 4-speed--storage
1985 500SEL--daily driver
1985 300TD--bad rust, soon to part out...
1982 300SD--waiting on engine from RD
1984 190E--storage
1996 Dodge 2500 Cummins--daily driver
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  #3  
Old 05-20-2015, 01:38 PM
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Location: San Luis Obispo, CA
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I concur with the previous post. No it is not normal and it probably is a ruptured diaphragm.
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1968 220D, W115, /8, OM615, Automatic transmission.
1987 300TD, W124, OM603, Automatic transmission.
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  #4  
Old 05-20-2015, 02:48 PM
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Fast idle as well

Quote:
Originally Posted by NickCox View Post
The diaphragm was my problem with the same symtoms. I'll ad that mine always idled high (1100-1500 rpm)

I think that is the only thing that can cause you issues.

Nick did you do your own repair on the diaphragm? How difficult was it to do with the IP on the car?
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1976 240d
1995 e300d
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  #5  
Old 05-20-2015, 04:19 PM
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Join Date: Oct 2007
Location: iowa
Posts: 168
Some people will call this the non preferred method.

I found a used ip. I took the used diaphragm from that pump and installed onto the original pump (I had the pump off the car, but I think you could do it without). My pump's diaphragm had a nice rip in it

Do a search on 'compensation path'. I honesttly didn't understand what it does, but i think you're gambling without doing it.I didn't mess with the shims. Engine idled and ran 90% better so I called it a win.
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Dave

1985 190D 2.2 auto--gone
1975 240D 4-speed--storage
1985 500SEL--daily driver
1985 300TD--bad rust, soon to part out...
1982 300SD--waiting on engine from RD
1984 190E--storage
1996 Dodge 2500 Cummins--daily driver
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  #6  
Old 05-20-2015, 04:53 PM
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Join Date: Mar 2015
Posts: 11
Quote:
Originally Posted by NickCox View Post
Some people will call this the non preferred method.

I found a used ip. I took the used diaphragm from that pump and installed onto the original pump (I had the pump off the car, but I think you could do it without). My pump's diaphragm had a nice rip in it

Do a search on 'compensation path'. I honesttly didn't understand what it does, but i think you're gambling without doing it.I didn't mess with the shims. Engine idled and ran 90% better so I called it a win.
we are of like mind...I don't tend to "follow the rules" but do so with awareness of an occasional "error', but the batting average has been very good so far..

I do have a spare low mileage 240d engine with the ip pump on it, could pull that whole pump and swap it out for this one, just a little intimidated on the whole ip pump timing rigmarole, but would save me the cost of that "apparently gold plated" piece of leather...
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1976 240d
1995 e300d
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  #7  
Old 05-20-2015, 06:40 PM
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Join Date: Oct 2007
Location: iowa
Posts: 168
Before pulling. Make sure the pump holds vac.

Here is something I forgot to mention: check the poppet cam? Shaft at the rear of pump. I had to jimmy new o-rings to get the whole system holding vac.

Far as pump replacement , it is quite doable. Just set the crank at spec. Remove pump and make a note of what spline tooth is at the 'start of delivery' mark. Then you'll have some drip timing to do.
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Dave

1985 190D 2.2 auto--gone
1975 240D 4-speed--storage
1985 500SEL--daily driver
1985 300TD--bad rust, soon to part out...
1982 300SD--waiting on engine from RD
1984 190E--storage
1996 Dodge 2500 Cummins--daily driver
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