RNRLOBSTA Posted June 20, 2012 Share Posted June 20, 2012 Just wondering if anyone could help out on this one.E7 american marine diesel in commercial lobster boat coming up on 10,000 hours. in approximatly 60 hours the crankcase was over filled by approx 1 gal with what im assuming is fuel.Sending out oil sample to confirm,but there ain't much else it can be.Oil is diluted and oil pressure drop is noted.this has been going on for the last couple hundred hours.Engine runs great no smoke,starts easy,temp 180.Not sure where to start looking,Lift pump,injector seals,injector pump.what say you?thanks in advance Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/ Share on other sites More sharing options...
RNRLOBSTA Posted June 20, 2012 Author Share Posted June 20, 2012 Probably should have mentioned its a mechanical,not electronic,its was built in 1997 or 98 Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-124762 Share on other sites More sharing options...
39 Baby Mack Posted June 20, 2012 Share Posted June 20, 2012 My first guess would be the "o" rings on the injectors.Ron 1 Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-124765 Share on other sites More sharing options...
bbigrig Posted June 21, 2012 Share Posted June 21, 2012 (edited) If I'm not mistaken, 97, 98 are the E-("junk") tech (with 6 EUP's) or good old E-7 (Inline pump) cross over years.whoops, never mind.... mechanical means old E-7 My bad. Edited June 21, 2012 by bbigrig Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-124788 Share on other sites More sharing options...
theakerstwo Posted June 21, 2012 Share Posted June 21, 2012 I would put dye in fuel and run it for a few min under a load a then pull covers and black light the injectors for fuel. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-124793 Share on other sites More sharing options...
RNRLOBSTA Posted June 21, 2012 Author Share Posted June 21, 2012 Thanks for the replies,honestly i didnt expect any replies.I think the dye job and blacklight trick will work.I didnt realize that id see the fuel at the top of the heads,i guess it will seep pass the caps that hold the injectors down if the o-rings are bad.We had the injectors out about 2500 hours ago after a cracked exhust manifold filled up a cylinder with coolant.Well thanks again. i'll report back when i get this done Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-124902 Share on other sites More sharing options...
Len Posted May 2, 2022 Share Posted May 2, 2022 Wait what! Cracked exhaust manifold equals water in your oil? No my friend that's not quite right. If you have water in your oil chances are your oil cooler is bad it's a common problem on the e-techs. There's no coolant running through your exhaust manifold. Lol. Either that or a head gasket is torched. Look in your expansion tank and see if you have milky mud sitting on top of your coolant if you do your oil cooler is bad. $1000 for a new one online Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496510 Share on other sites More sharing options...
Len Posted May 2, 2022 Share Posted May 2, 2022 I work on a fleet of 6 Mack trucks all with E-tech engines. 2 with mechanical injection and 4 with electronic andi have encountered every scenario you can think of and have diagnosed and repaired every scenario you could come up with and one crucial piece of advice i can give all E-tech owners is KEEP THE OIL CHANGED!!! these are roller cam engines and dirty oil = bad lifter wheel and wiped out camshaft and that is more costly and time consuming than doing an inframe bottom end overhaul! Keep that oil CHANGED. ANYONE has any issues or questions on your etech feel free to ask me cuz i been there, done that! Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496511 Share on other sites More sharing options...
Len Posted May 2, 2022 Share Posted May 2, 2022 (edited) Water in the cylinder means bad head gasket or sleeve seals. You need to just pull it down and buy an inframe overhaul kit with sleeves pistons and bearings cuz if you do just a head gasket chances are you will be back in there again. Be sure you replace the head bolts cuz they lose their tensile properties. Head bolts stretch and that's what keeps clamping tension always pulling the head to the block. You do not want to re use head bolts cuz they won't stretch a second time. Oh and use only genuine Mack head gaskets. If ever i need to pull heads off i always use Mack head gaskets and head bolts. Everything else i go aftermarket Edited May 2, 2022 by Len Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496512 Share on other sites More sharing options...
Hayseed Posted May 2, 2022 Share Posted May 2, 2022 Not being Rude Len...BUT, you're 9 Years & 11 Months behind the Times.....🧐 2 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/25769-e7-fuel-in-crankcase-oil/#findComment-496513 Share on other sites More sharing options...
Vladislav Posted May 2, 2022 Share Posted May 2, 2022 And the engine in the original talk was a boat application. My guess is if you have water all around you some also may circulate over exhaust manifold. I'm not familiar with marine engine engineering though. 2 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496515 Share on other sites More sharing options...
theakerstwo Posted May 2, 2022 Share Posted May 2, 2022 Len keep posting cause i have already learned alot from your post.We need more of your talent in here. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496552 Share on other sites More sharing options...
Joey Mack Posted May 2, 2022 Share Posted May 2, 2022 ? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496553 Share on other sites More sharing options...
Joey Mack Posted May 3, 2022 Share Posted May 3, 2022 Hello Len. I was wondering what the maximum amount of shim's is allowable, after cutting the counterbore in an E-Tech? I havent found any info on this.. joojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496577 Share on other sites More sharing options...
theakerstwo Posted May 3, 2022 Share Posted May 3, 2022 I been wanting to know about that myself.Its good to have a go/to man on here for such info.Thanks in advance. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496600 Share on other sites More sharing options...
Dirtymilkman Posted May 4, 2022 Share Posted May 4, 2022 I wanna see the sleeve seals he talked about on an E7. Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496671 Share on other sites More sharing options...
Joey Mack Posted May 4, 2022 Share Posted May 4, 2022 (edited) my guess is the liners with the orings near the top of the liner. Mack did away with them when the E-Tech came out. I dont remember them in the first E-Tech's, but maybe.. I know I built a few E-7's that had them and the new liner kits did not... Of course I have only built about 30 of these engine's, so I really haven't seen it all yet.. jojo Edited May 4, 2022 by Joey Mack More content needed Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496672 Share on other sites More sharing options...
Vmac3 Posted May 4, 2022 Share Posted May 4, 2022 Maybe the Mods here can put a separate section for him where people can visit to have their problems solved. I don't know, maybe call it "Ask Len. Your One Stop Shop For Problem Solving. Cuz I've Been There, Done That". V 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496696 Share on other sites More sharing options...
880joe Posted May 4, 2022 Share Posted May 4, 2022 Maybe the people on here with more knowledge than Len could help him instead of make fun of him all he was trying to do was help another member on here with a problem Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496715 Share on other sites More sharing options...
theakerstwo Posted May 4, 2022 Share Posted May 4, 2022 Len get back in here we would like for you to feel welcome in here. 2 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496718 Share on other sites More sharing options...
Hayseed Posted May 5, 2022 Share Posted May 5, 2022 11 hours ago, 880joe said: Maybe the people on here with more knowledge than Len could help him instead of make fun of him I wasn't making Fun of Len, (Far From It) I was Merely pointing out that He had revived a Thread that was one Month short of 10 years Old, since It's last Post....!!! 11 hours ago, 880joe said: all he was trying to do was help another member on here with a problem The Member in Question only has made 4 posts Forum-Wide. .All in this Thread from 10 Years ago. & who hasn't logged on since then..!! The chances of RNRLOBSTA reading & making use of Len's Posts is (IN My Opinion) Slim to None....!! 9 hours ago, theakerstwo said: Len get back in here we would like for you to feel welcome in here I wholeheartedly Agree...!! You clearly have real-world Practical Experience in working on Mack Product. Which(In My Opinion) trumps Theory & Book Knowledge every day of the Week..!! 2 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/25769-e7-fuel-in-crankcase-oil/#findComment-496752 Share on other sites More sharing options...
Onyx610 Posted May 5, 2022 Share Posted May 5, 2022 And RNRLOBSTA probably doesn’t even have the boat anymore. 😄 1 Quote Link to comment https://www.bigmacktrucks.com/topic/25769-e7-fuel-in-crankcase-oil/#findComment-496754 Share on other sites More sharing options...
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