JPET_48760 Posted February 11, 2021 Share Posted February 11, 2021 Hey guys I've just recently started working at a new company an we've got a 01 mack with a eup that is leaking at the base. Before i got here The previous mechanic had dealt with this truck popping the eup out and breaking one of the bolts he had drilled and tapped the the hole to another size. I believe that is my issue my. Fuel just pours out between the block and the eup. I just got him to get brand new Orings for it and the middle one is apparently not needed anymore. Show I leave the old middle one on? I'm not sure if this will work for ut because of that drilled an tapped hole. But I will post how my outcome is. Quote Link to comment https://www.bigmacktrucks.com/topic/65868-mack-e7-eup-leaking-leaking-at-base/ Share on other sites More sharing options...
fjh Posted February 11, 2021 Share Posted February 11, 2021 17 minutes ago, JPET_48760 said: Hey guys I've just recently started working at a new company an we've got a 01 mack with a eup that is leaking at the base. Before i got here The previous mechanic had dealt with this truck popping the eup out and breaking one of the bolts he had drilled and tapped the the hole to another size. I believe that is my issue my. Fuel just pours out between the block and the eup. I just got him to get brand new Orings for it and the middle one is apparently not needed anymore. Show I leave the old middle one on? I'm not sure if this will work for ut because of that drilled an tapped hole. But I will post how my outcome is. NO Leave it off the center That one is redundant to bad he drilled it bigger they usually just turn out with very little effort! 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/65868-mack-e7-eup-leaking-leaking-at-base/#findComment-468785 Share on other sites More sharing options...
Joey Mack Posted February 11, 2021 Share Posted February 11, 2021 make sure the champher in the EUP bore is spotless before going back in.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/65868-mack-e7-eup-leaking-leaking-at-base/#findComment-468824 Share on other sites More sharing options...
Dirtymilkman Posted February 13, 2021 Share Posted February 13, 2021 Make sure your fuel return line is rubbed through and leaking. The fuel will wick around an eup and look like the o rings are leaking. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/65868-mack-e7-eup-leaking-leaking-at-base/#findComment-468920 Share on other sites More sharing options...
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