steven johnson Posted March 10, 2019 Share Posted March 10, 2019 Our MP8 is leaking fuel out of the injector pump I checked the lines and they are tight so I was hoping that someone might have experience with this and could give me an idea what I might have to do. I see that it looks like the pump runs off of the flywheel and is a tough spot to get to .We have two of these units and they are both leaking . Thank You all for your help and God Bless Steve Quote Link to comment https://www.bigmacktrucks.com/topic/56100-2008-mp8/ Share on other sites More sharing options...
Mackpro Posted March 11, 2019 Share Posted March 11, 2019 The fuel supply pump is mounted to the power steering pump then the power steering pump is bolted to the timing gear housing. If it leaks fuel out of the weep hole where the two bolt together then I would replace the complete unit. They call it a “tandem pump” . There is a service bulletin on replacing the complete unit versus just the fuel pump due to an alignment problem that could occur causing the fuel pump to go out again. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/56100-2008-mp8/#findComment-417924 Share on other sites More sharing options...
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