97 E300 Diesel Fuel Leak...needs Help!!!
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Joined: Nov 2005
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97 E300 Diesel Fuel Leak...needs Help!!!
I noticed a small leak by the plastic lines that connect the fuel filter & injection pump etc. I replaced all the lines/"O" rings $55. I still have a leak. Seems to be at the injection pump right under the shutoff actuator. (a small black plastic box about 3" long on the top side of the injection pump it has a 1" diameter electric plug & 2 of the plastic lines connect on the top & 1 on the bottom) My questions is how do I remove this shut off actuator? Can itbe repaired? resealed? or I just need to buy a new one? Any words of wisdom will be greatly appreciated.
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Joined: Nov 2005
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From: Walla Walla, WA
'87 300D, '97 E300D
I recently went through this with my '97 E300. There is a small O-ring behind the shutoff valve on a nozzle that protrudes into the injection pump. The O-ring fails along with those in the fuel lines.
Removal of the shutoff valve involves removal of two torx bolts holding it onto the pump. If you need a torx set, they are available at Sears. May also need to remove the multiple fuel lines on the valve to free it up. Also may need to remove intake manifold to gain access to it all.
Removal of the shutoff valve involves removal of two torx bolts holding it onto the pump. If you need a torx set, they are available at Sears. May also need to remove the multiple fuel lines on the valve to free it up. Also may need to remove intake manifold to gain access to it all.
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No more leak!!
I purchased a new shut off valve,($155) I was able to see the bolt pattern and how it was attached to the injection pump. I replaced it/"O" ring and it works great!! it actually feel more responsive. Thanks a lot for your input. 
