dickey Posted April 23, 2019 Share Posted April 23, 2019 (edited) just bought this 1994 dump with e7 400 the thing runs excellent,no blowby,no smoke pulls great, oil pressure 56lbs at 1650 but at idle 8 lbs bump it to 800 rpm and its 30lbs ,,,oil pump??? already changed filter,oil,and put manual gauge on it,,,???? Edited April 23, 2019 by dickey not enough info Quote Link to comment https://www.bigmacktrucks.com/topic/56864-good-running-e7-low-oil-pressure-at-idle/ Share on other sites More sharing options...
0 JoeH Posted April 24, 2019 Share Posted April 24, 2019 What speed is it idling at? Should be about 650 rpms. If it's lower than that then bump it up. Quote Link to comment https://www.bigmacktrucks.com/topic/56864-good-running-e7-low-oil-pressure-at-idle/#findComment-421244 Share on other sites More sharing options...
0 dickey Posted April 24, 2019 Author Share Posted April 24, 2019 yep 650 Quote Link to comment https://www.bigmacktrucks.com/topic/56864-good-running-e7-low-oil-pressure-at-idle/#findComment-421267 Share on other sites More sharing options...
0 Mack Technician Posted May 9, 2019 Share Posted May 9, 2019 (edited) Pull pan, pull oil pump, disassemble, Check oil relief plunger and seat for galling. If it’s galled too bad replace, otherwise clean it up. Check pump rotating group, of gears pass inspection install it. Mid pump looks good pull a rod and a main to check bearings. Edited May 9, 2019 by Mack Technician Quote Link to comment https://www.bigmacktrucks.com/topic/56864-good-running-e7-low-oil-pressure-at-idle/#findComment-422315 Share on other sites More sharing options...
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dickey
just bought this 1994 dump with e7 400 the thing runs excellent,no blowby,no smoke pulls great, oil pressure 56lbs at 1650 but at idle 8 lbs bump it to 800 rpm and its 30lbs ,,,oil pump??? already changed filter,oil,and put manual gauge on it,,,????
Edited by dickeynot enough info
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