martyv231 Posted October 15 Share Posted October 15 Hello I have 1999 e7 460 etech new engine top to heads, new primer pump orings all around. Getting 4 gallons of fuel in 10 hours in oil. After I put 4000 miles on the truck. Used my old eups, injectors. All plugs were put in. Orings looks fine tubes look ok. Not leaking from front cover. Injectors oring good.any ideas? Thank you Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/ Share on other sites More sharing options...
fjh Posted October 15 Share Posted October 15 Fuel transfer pump is my first thought that’s a lot of fuel! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560086 Share on other sites More sharing options...
Joey Mack Posted October 15 Share Posted October 15 Eup o-rings?? Do you know what the fuel pressure is? Why was all this work done? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560087 Share on other sites More sharing options...
MACKS Posted October 15 Share Posted October 15 Six gallons of oil diluted with four gallons of diesel kiss that engine good by..🤔 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560088 Share on other sites More sharing options...
67RModel Posted October 15 Share Posted October 15 1 hour ago, MACKS said: Six gallons of oil diluted with four gallons of diesel kiss that engine good by.. I doubt it. Somebody can correct me here but I imagine if the oil pressure is low enough to cause major engine damage it will shut off and not restart. I would think an ETech would have these electronic protections by 1999. This happened to me with a model year 1994 DDEC III Series 60 Detroit and the engine shut down light came on. I used the override button for a time but got to a point where it shut itself off and wouldn't restart. I have a more detailed write up on it somewhere here on the forum with the whole story but what it amounted to was the #5 injector was seriously malfunctioning dumping lots of raw fuel into the cylinder and getting past the rings. Crankcase was so overfull that when I drained it out the mixture was so thin I was able to dump it back in the fuel tank of an old farm tractor and it burned it like regular off road fuel. Not a lick of damage to the engine. I think I got lucky but I also think that if the oil pressure is too low the ecm will protect itself from an idiot 🤣. Mine went from running normal to broke down in less than 2 hours and yes there was very noticeable signs and symptoms but I kept running it. I was young, dumb, and an idiot. As far as I know that engine was removed from the truck when I sold it and put in a much newer truck and as far as I know is still running like a sewing machine to this day. In my case it suddenly developed a very noticeable noise. From within the cab while driving it sounded like an exhaust leak so I kept going. Then when it all came to a head I was on a major interstate in an 8 or 10 mile long single lane construction zone with jersey barriers on each side. Nowhere to pull over. Fun times..... 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560095 Share on other sites More sharing options...
Joey Mack Posted October 15 Share Posted October 15 His engine will shut down if it reads 10 Psi or less for 5 seconds. Provided the oil sensor is working.. i really want to know what happened to require all the work? 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560097 Share on other sites More sharing options...
MACKS Posted October 15 Share Posted October 15 15 minutes ago, Joey Mack said: His engine will shut down if it reads 10 Psi or less for 5 seconds. Provided the oil sensor is working.. i really want to know what happened to require all the work? Yeah. If he decides to come back..🤷♂️ 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560098 Share on other sites More sharing options...
Joey Mack Posted October 15 Share Posted October 15 too much of that MACKS... I posted my thoughts on my profile about that issue.. I am still going to offer whatever help I can.. I also know that there a lot of guys that will do the same... 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560103 Share on other sites More sharing options...
MACKS Posted October 15 Share Posted October 15 58 minutes ago, Joey Mack said: too much of that MACKS... I posted my thoughts on my profile about that issue.. I am still going to offer whatever help I can.. I also know that there a lot of guys that will do the same... I to will offer my limited knowledge as well … 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560106 Share on other sites More sharing options...
Joey Mack Posted October 15 Share Posted October 15 you always offer your great knowledge... You have owner operator knowledge that is far beyond mine and equally as valuble as mechanial knowledge, which you have as well.. this is why I keep posting.. I learned that there are a bunch of guy's that will freely give thier great knowledge.. with respect.. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560107 Share on other sites More sharing options...
MACKS Posted October 15 Share Posted October 15 I can offer a few tidbits on the old stuff no computerized. Engines for me ,lol 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560108 Share on other sites More sharing options...
JoeH Posted October 15 Share Posted October 15 This engine will be pre CCRS, could there be a screw up on the heads? I think pre CCRS uses a fuel return from the heads, the CCRS heads did away with the return leak off I think. Just spitballing. Or the fuel gallery plug under the timing cover. Those are my spitballs. Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560114 Share on other sites More sharing options...
Joey Mack Posted October 15 Share Posted October 15 the fuel gallery in the heads is internal and willl leak externally, unless the head is cracked, and that i s super rare in my experience.. nothing said about haveing the front cover off and checking the lower fuel galley plug in the front, also not very common but does happen.. i'm trying to avoid posting my kneejerk concern.. Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560116 Share on other sites More sharing options...
fjh Posted October 16 Share Posted October 16 1 hour ago, Joey Mack said: the fuel gallery in the heads is internal and willl leak externally, unless the head is cracked, and that i s super rare in my experience.. nothing said about haveing the front cover off and checking the lower fuel galley plug in the front, also not very common but does happen.. i'm trying to avoid posting my kneejerk concern.. I already posted my main thought due to the lack of clarity! Done till more is revealed! To much fuel in there to be much else unless they cut an oring on assembly!have seen the shaft seals blow out while priming! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560127 Share on other sites More sharing options...
Joey Mack Posted October 16 Share Posted October 16 yup, but he said he repalced the primer, or was it the whole fuel pump??? we dont know.. I will also wait again, I just had a thought.. Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560129 Share on other sites More sharing options...
fjh Posted October 16 Share Posted October 16 12 hours ago, Joey Mack said: yup, but he said he repalced the primer, or was it the whole fuel pump??? we dont know.. I will also wait again, I just had a thought.. Puppy Poster likely won't return! Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560147 Share on other sites More sharing options...
70mackMB Posted October 16 Share Posted October 16 18 hours ago, Joey Mack said: we dont know.. I will also wait again, 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560176 Share on other sites More sharing options...
martyv231 Posted October 23 Author Share Posted October 23 I replaced the primer thinking it was the issue. The reason I replaced the engine with a remanufactored one was due to having 2 leaking liners, cam face was going out, crank wasn't far behind. Then when I pulled the valve trian on the old engine also found 2 cracked valve springs. So I said screw it bought a new engine sent old one in for core charge. While replacing with the engine we put all new EUP, INJECTOR, orings. Since I posted this (I'm not online a lot pretty busy). I have went through put new EUP ORINGS in again checked injector tubes for cracks put the new primer pump in. Still having the issue. Around 2 to 3 gallons of fuel in a 10 hr day of dump trucking. It started happening at around 5000 miles engine currently has 6000 and is parked as of today. I think I'm going to go with the plug behind the timing cover. If it was an injector issue wouldn't it run bad or act like it was missing? This truck has been great in the 6 years I've owned it. Now it's a nightmare that's driving me crazy. I did reuse my old injectors and Eup with new Eup cups since the old ones were defaced from the bad came in my old engine. The only thing that was different in this new engine compared to my old one is the push tubes. This new engine take 6 spring loaded push tubes other wise I would have had a 1/2 inch gap on my valve bridges. That's the only thing different. Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560643 Share on other sites More sharing options...
Joey Mack Posted October 23 Share Posted October 23 ok.. good report.. the plug behind the timing cover can leak, I have seen it a few times. It is rare in my experience but possible.. Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560644 Share on other sites More sharing options...
martyv231 Posted October 23 Author Share Posted October 23 Yeah ive heard that. I was tryin to eliminate the easier stuff before ripping apart the front of the engine. I ran some fuel dye in the fuel filter for 40 45 seconds and pulled the blow by by filter housing off since its in the same area. Took my snake camera and poked it in there and did see spots of orange which is the exact same color as he dye. I tried fitting my black light in there at the same time, didnt work. So i need to go buy a better ligtht and smaller. Idk what else it could be on a brand new engine. \ Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560648 Share on other sites More sharing options...
Joey Mack Posted October 23 Share Posted October 23 good call on the dye and puling the breather, I almost posted to pull the breather and pump the primer to see if you could see fuel running.. So 3 years ago, I had 2 engines at one customers co. with fuel in the oil.. the first one, was hard to find,, and the owner said,, jojo!!! re-build the damn thing.. pulled the front cover.. no leak at the plugs. upon tear down I found 2 pistons with stuck rings... the engine was getting washed by #3+#4... The second one, had a major fuel leak at the lower fuel gallery plug behind the front cover.. Both engines are still at work today.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560650 Share on other sites More sharing options...
cruiseliner64 Posted October 24 Share Posted October 24 Is this engine computer controlled? Im only asking out of interest as iv no knowledge of this set up.if anyone can sort it out you can joey.... Paul Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560729 Share on other sites More sharing options...
Joey Mack Posted October 24 Share Posted October 24 Yes Paul, it is.. the fuel galleries on this engine are simple, 2 straight 1/2'' bores from front to back. the E.U.P.'s are individual cam drive fuel pumps. There is one per cylinder.. Over the years I have developed a great respect for this breed of Mack engine, even though I love the E-6 and E-7. mechanicals.. also Paul,,, for a computerised engine , the early ones are much simpliar than what we have today,, almost primitive in comparison... I dont like E.E.C.U.'s, but I would own an early E-tech in a heart beat.. Of course I spent 20+ years on that platform,(to use a modern phrase)... Jojo 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560731 Share on other sites More sharing options...
fjh Posted October 25 Share Posted October 25 sounds like the fuel is is being flung around I really suspect the transfer pump ! I highly doubt a plug would spray fuel like that it would have to be hand tight! that said anything can happen! put some more dye in the filter run it for a minute or two and then pull the transfer pump should be a defind trail of fuel running from the shaft area behind the gear if its fubar! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74636-fuel-in-oil/#findComment-560770 Share on other sites More sharing options...
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