Joey Mack Posted July 21, 2022 Share Posted July 21, 2022 it caps the line bored fuel return gallery. who knows, mabey they were going to make a straight 8 and thought they could add 2 cyl's to it... next time you pull and EUP.. look in the bore. you will see 4 holes. 2 on each side, over and under. those are the fuel galleries... jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70107-fuel-still-in-oil/page/2/#findComment-503779 Share on other sites More sharing options...
Onyx610 Posted July 22, 2022 Share Posted July 22, 2022 So basically what your saying is it has no purpose but possibly leaking and destroying an engine? Sounds like a Volvo idea. Quote Link to comment https://www.bigmacktrucks.com/topic/70107-fuel-still-in-oil/page/2/#findComment-503781 Share on other sites More sharing options...
Joey Mack Posted July 22, 2022 Share Posted July 22, 2022 no no no... its a plug... a human put it in wrong... next time you pull a front cover, remove it, clean it, dope it and put it back in,,,, 'tight'.. that's all.... 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70107-fuel-still-in-oil/page/2/#findComment-503783 Share on other sites More sharing options...
steeler Posted July 22, 2022 Share Posted July 22, 2022 The plug is there just to cap off the hole that was created when they drilled for the fuel gallery. Like jojo said, if it were put in correctly the first time, which most are, you'd never have a leak there. I've just gotten in the habit of resealing them whenever I have the front cover off. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70107-fuel-still-in-oil/page/2/#findComment-503796 Share on other sites More sharing options...
Rurey logging Posted August 7, 2022 Author Share Posted August 7, 2022 WELL guys sorry to take so long to get back, but every thing is back together, and back on the road, every bodies help was priceless,thank you all ! THe problem all along was # 4 EUP pin broke allowing fallower to turn destroying fallower and eup along with cam, my magnets worked well. replaced cam,all eup fallowers and all valve fallowers and #4 EUP.. and rolled in a set of main And rod bearing just for fun. run well now seems to run quieter and smoother,OIL pressure seems a bit lower,dont no why ? THANK again Randy Rurey Quote Link to comment https://www.bigmacktrucks.com/topic/70107-fuel-still-in-oil/page/2/#findComment-505541 Share on other sites More sharing options...
terry Posted August 7, 2022 Share Posted August 7, 2022 Did you check oil pump for pieces or damage? Terry Quote Link to comment https://www.bigmacktrucks.com/topic/70107-fuel-still-in-oil/page/2/#findComment-505543 Share on other sites More sharing options...
Joey Mack Posted August 7, 2022 Share Posted August 7, 2022 did you replace the oil pump? if so, was it a PAI pump.. I just used 2 of them in a row, and low idle, fully warmed up, the pressure is around 30-32 PSI.. I have had 35 plus with Mack pumps. However, going down the road the PAI pumps make 50+.. jojo Quote Link to comment https://www.bigmacktrucks.com/topic/70107-fuel-still-in-oil/page/2/#findComment-505548 Share on other sites More sharing options...
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