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Old 04-03-2013, 10:33 PM
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617 fuel pump in tank?

I always thought the fuel and injection pump were the same thing on the OM617. A buddy at work claims that his mechanic is telling him he has to remove the tank to replace the fuel pump. Do w123 have an extra pump in the tank?

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Old 04-03-2013, 11:05 PM
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There is no fuel pump in the tank. The only fuel pump it has other than the injection pump is called the lift pump, which is the unit that the hand primer pump is on.
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1979 280CE 225,200 miles
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1976 240D 190,000 miles
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1976 300D 195,300 miles
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Old 04-03-2013, 11:46 PM
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Better find a different mechanic, he has no clue. 79mercy nailed it, he has far more experience than the mechanic.

Charlie
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there were three HP ratings on the OM616...

1) Not much power
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Anyone that thinks a 240D is slow drives too fast.

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Old 04-04-2013, 12:20 AM
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I have been writing it like this "Fuel Supply/Lift Pump" in hopes those who don't know will realize there is a Fuel Supply Pump as well as a Fuel Injection Pump.

Lift Pump is kind of Jargon phrase; Fuel Supply Pump is more descriptive.

So the Fuel Supply Pump bolts onto the side of the Fuel Injection Pump.

What is confusing is that many Fuel Injections Pumps have the Fuel Supply/Lift Pump built inside of them as do the VW Rabbit/Jetta type Fuel Injection Pumps and the Standyne ones used on the GM Diesel and Ford Pick Up Trucks.

After 18 years as a Mechanic the Mercedes Forums are the first Place I have read where the Fuel Injection Lines are called Hard Lines; but since you Guys use that term I have to.
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Old 04-04-2013, 05:12 AM
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Only the W123 gassers with fuel injection have a fuel pump near the tank.
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  #6  
Old 04-04-2013, 05:50 PM
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DIFFERENT MECHANIC IMMEDIATELY!!!!!!

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1982 300D Turbodiesel, daily driver. Mods so far: Fram 8038 paper filter, 4 brake light mod, Gen II w126 (front) rotors/calipers, boost turned up to 12lbs, non-egr manifolds, water/methanol injection, 4-speed manual
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