Firedigger11 Posted May 7, 2015 Share Posted May 7, 2015 Please help I might have a lemon,Since I bought this truck it was supposed to be a new rebuilt motor. I've had hp turned up to 427 by mack then sleeve replaced to fix water in the oil. Then lost hp due to loose boost line. Then lost jake brake from bad injector. Since the injector has been replaced the oil pressure has decreased and oil level is increasing. The mechanic/seller also removed the centramax filter assy was removed including vent and paper filter installed in its place. Apparently to mask the oil pressure loss. I have since replaced the centrifugal filter assy. Any advice is appreciated...... Wher is the fuel coming from? How hard is it to fix? And about how much will it cost? Quote Link to comment Share on other sites More sharing options...
hatcity Posted May 7, 2015 Share Posted May 7, 2015 could be one of the EUP seals. There is a "newer""better seal kit now.Hard t tell which is NG, replace all 6. Can't remember price but need to use new hold down boltsI for got to mention-WELCOME!!!bring it over to MACK/Nashville. tell them you want Staxx to work on it ONLY!!!! Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment Share on other sites More sharing options...
Firedigger11 Posted May 7, 2015 Author Share Posted May 7, 2015 Thank you for your infoI also put a new oil pressure switch as it was shutting down engine intermittently with random oil pressure levels. Problem solved for now. Till the oil gets deleted further.... Quote Link to comment Share on other sites More sharing options...
Joseph Moody Jr Posted May 7, 2015 Share Posted May 7, 2015 Welcome to BMT Quote Link to comment Share on other sites More sharing options...
mrsmackpaul Posted May 7, 2015 Share Posted May 7, 2015 welcome aboard The oil pressure problem might caused by the fuel getting in making the oil thinner Paul Quote Link to comment Share on other sites More sharing options...
staxx Posted May 7, 2015 Share Posted May 7, 2015 Bring it by the shop , welcome to BMT !!! Sounds like supply pump seal failed or end galley fuel plug . Need to fix issue asap = fuel in oil , kills bearings . Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.