clpetty Posted January 27, 2023 Share Posted January 27, 2023 we have a 2019 mp7 using between 2-3 qts of oil every 3 weeks with no signs of leaks or soot in exaust. the ccv is clean too. any ideas ? we cahnge the oil every 450 hrs and all filters air oil and fuel.since day 1 truck has approx 190k now Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/ Share on other sites More sharing options...
Onyx610 Posted January 27, 2023 Share Posted January 27, 2023 (edited) What’s the coolant and air tanks looking like? If it’s burning it, you most likely won’t see it in the exhaust. Just when the dpf becomes plugged up. Edited January 27, 2023 by Onyx610 Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523947 Share on other sites More sharing options...
clpetty Posted January 27, 2023 Author Share Posted January 27, 2023 coolant tank is clean that was one of the first places i looked Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523951 Share on other sites More sharing options...
mdixon Posted January 27, 2023 Share Posted January 27, 2023 Pull the line off the air dryer from the compressor. If it's full of oil the compressor is shot. You may even see it on the cutout valve exhaust port. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523953 Share on other sites More sharing options...
Joey Mack Posted January 27, 2023 Share Posted January 27, 2023 Just curious... Can you pull the pipe off the back of the turbo to see if it is oily and such? Thats a lot of oil to lose with no obvious signs.. I would also think the DPF would have been clogged quickly.. Is there not excessive blow by? I know you said the CCV was clean. I see the mileage is low.. I'm curious, just because.... Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523955 Share on other sites More sharing options...
mdixon Posted January 27, 2023 Share Posted January 27, 2023 You'd think the dpf would be regening constantly if it was making it into the air stream, either intake or exhaust. Have you looked inside transmission bellhousing? It would likely be dripping if it's losing that much oil out the rear main seal, but maybe not. Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523956 Share on other sites More sharing options...
Joey Mack Posted January 27, 2023 Share Posted January 27, 2023 mdixon, I'm stumped, based on the info posted.. Thats a lot of oil, even if it just started recently.. I wonder how clean the under carriage is.. 🤔 Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523957 Share on other sites More sharing options...
mdixon Posted January 27, 2023 Share Posted January 27, 2023 And did this just start? I personally have no idea how much our trucks consume between services, I only see them when they need major work. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523960 Share on other sites More sharing options...
terry Posted January 28, 2023 Share Posted January 28, 2023 2 hours ago, Joey Mack said: Just curious... Can you pull the pipe off the back of the turbo to see if it is oily and such? Thats a lot of oil to lose with no obvious signs.. I would also think the DPF would have been clogged quickly.. Is there not excessive blow by? I know you said the CCV was clean. I see the mileage is low.. I'm curious, just because.... do you think a quart a week is a lot? Terry Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523970 Share on other sites More sharing options...
Joey Mack Posted January 28, 2023 Share Posted January 28, 2023 Terry, are you asking me if a quart a week is a lot? I say yes if it is, as well serviced as stated, and if it is, well serviced this issue should have been seen as it progressed, and not an ' all of a sudden'.. Of course, I do not know who is driving and how he/she is driving.. if this was an E-6 or E-7, with real work and age in it's history,, no sweat,,keep squirting oil, til you need to do more to fix it.. but a 4 year old MP-7 with 190k??? dunno.. How many hours? and does it idle at 650 it's whole life?... jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523971 Share on other sites More sharing options...
Mackpro Posted January 28, 2023 Share Posted January 28, 2023 6 hours ago, clpetty said: we have a 2019 mp7 using between 2-3 qts of oil every 3 weeks with no signs of leaks or soot in exaust. the ccv is clean too. any ideas ? we cahnge the oil every 450 hrs and all filters air oil and fuel.since day 1 truck has approx 190k now Not really ever see any oil consumption issues with the MP engines. Has any major engine work ever been done to the engine? Have you changed to a different oil weight or brand lately? Mack is pretty specific on their oil rating . EOS-4.5/CK-4 is the recommendation rating . The MP7’s did have some CCV issues that blowed oil out and also low oil pressure warnings when in hot conditions but all that was fixed years ago. https://www.macktrucks.com/-/media/files/body-builder/manuals/heavy-duty/2022/mack-section-1--oil-and-filter.pdf?rev=3fe5689395524824988bae78e9d93183&hash=4A654651964E2CF482A1F80AB207CF46 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523977 Share on other sites More sharing options...
Hayseed Posted January 28, 2023 Share Posted January 28, 2023 6 hours ago, clpetty said: we have a 2019 mp7 using between 2-3 qts of oil every 3 weeks Any Idea how many Engines Hours/Miles between Top Ups...?? Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523978 Share on other sites More sharing options...
Onyx610 Posted January 28, 2023 Share Posted January 28, 2023 26 minutes ago, Mackpro said: Not really ever see any oil consumption issues with the MP engines. Has any major engine work ever been done to the engine? Have you changed to a different oil weight or brand lately? Mack is pretty specific on their oil rating . EOS-4.5/CK-4 is the recommendation rating . The MP7’s did have some CCV issues that blowed oil out and also low oil pressure warnings when in hot conditions but all that was fixed years ago. https://www.macktrucks.com/-/media/files/body-builder/manuals/heavy-duty/2022/mack-section-1--oil-and-filter.pdf?rev=3fe5689395524824988bae78e9d93183&hash=4A654651964E2CF482A1F80AB207CF46 yes they did and it’s too bad it’s not a filter that can just be replaced. It’s the whole module at 800 dollars. Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523983 Share on other sites More sharing options...
Mackpro Posted January 28, 2023 Share Posted January 28, 2023 We replaced tons of CCV’s on MP7’s. The brass nipple that directed the oil to spray the spinner filter to make it spin would fall out which would at times blow oil out the blow by hose . Fun times . 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523986 Share on other sites More sharing options...
Onyx610 Posted January 28, 2023 Share Posted January 28, 2023 1 hour ago, Mackpro said: We replaced tons of CCV’s on MP7’s. The brass nipple that directed the oil to spray the spinner filter to make it spin would fall out which would at times blow oil out the blow by hose . Fun times . Good times for sure, that job can be a pain in the ass too if you don’t do them a lot. Pry no biggie for you haha. Weird how it was really only mp7s. Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-523990 Share on other sites More sharing options...
terry Posted January 28, 2023 Share Posted January 28, 2023 12 hours ago, Joey Mack said: Terry, are you asking me if a quart a week is a lot? I say yes if it is, as well serviced as stated, and if it is, well serviced this issue should have been seen as it progressed, and not an ' all of a sudden'.. Of course, I do not know who is driving and how he/she is driving.. if this was an E-6 or E-7, with real work and age in it's history,, no sweat,,keep squirting oil, til you need to do more to fix it.. but a 4 year old MP-7 with 190k??? dunno.. How many hours? and does it idle at 650 it's whole life?... jojo Guess I’m just used to the old E-6 and 7 that used to take a quart or two a day and run forever 😂. Terry 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-524011 Share on other sites More sharing options...
Joey Mack Posted January 28, 2023 Share Posted January 28, 2023 (edited) Terry,, I figured that was the idea.. Mp's are pretty good about not consuming oil. Thats also why I posted about the E-6+E-7.. Im glad to know I'm on the same page as you sir.. Well, it's a nice day here, today, and I need to finish the frame repair on my Yota.. Then update it in 'Shop Talk" Cya jojo P.S. I hope he finds a simple reason for his oil usage... Edited January 28, 2023 by Joey Mack poor sperring.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-524018 Share on other sites More sharing options...
clpetty Posted January 30, 2023 Author Share Posted January 30, 2023 air line to dryer is clean and back side of turbo is fairly clean.. its been using oil since about 100k .and the undercarriage is dry. no visible leaks or usage of oil, thats what has me stumped. we are waiting for the oil sample to come back so we can get a better idea of whats going on. Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-524225 Share on other sites More sharing options...
clpetty Posted January 30, 2023 Author Share Posted January 30, 2023 I must add that, this is the only truck out of our 17 truck fleet that has this issue... Quote Link to comment https://www.bigmacktrucks.com/topic/72436-mp7-using-oil/#findComment-524226 Share on other sites More sharing options...
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