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Old 02-05-2011, 10:15 PM   #1
Zeppe
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12.7 Detroit needs help

I've been viewing the threads dealing with the Series 60 Detroit Diesel and have to say thanks for the information; what I have read so far has been very informing.
I'm new here and this is my first posting.

I have a 2001 DDEC IV, pre EGR that's been slowly deteriorating over the past few months. I'm now starting to show fuel in the oil, not much (yet), but enough to know that I have a big problem developing. It smokes alot, (but then again, it's a Detroit), blowby is getting excessive in my opinion. I know the primary solution for this is rings and I'm wondering if this is where the fuel could or is most likely getting to the oil pan? The other thing which actually started me looking for solutions is I can't keep an exhaust manifold on this thing, they keep cracking. Is there a relation between the two? has one fed the other? I've been going through oil like mad, and I'm going broke.
Any help will be greatly appreciated.
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Old 02-05-2011, 11:28 PM   #2
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Quote:
Originally Posted by Zeppe View Post
I've been viewing the threads dealing with the Series 60 Detroit Diesel and have to say thanks for the information; what I have read so far has been very informing.
I'm new here and this is my first posting.

I have a 2001 DDEC IV, pre EGR that's been slowly deteriorating over the past few months. I'm now starting to show fuel in the oil, not much (yet), but enough to know that I have a big problem developing. It smokes alot, (but then again, it's a Detroit), blowby is getting excessive in my opinion. I know the primary solution for this is rings and I'm wondering if this is where the fuel could or is most likely getting to the oil pan? The other thing which actually started me looking for solutions is I can't keep an exhaust manifold on this thing, they keep cracking. Is there a relation between the two? has one fed the other? I've been going through oil like mad, and I'm going broke.
Any help will be greatly appreciated.
are you running a pyrometer sounds like its over fueling big time iam not much on detroits you could have a bad injector seat or oring leaking, how is the oil pressure ? oil in fuel can do a number on your bearings, is the power o.k. ? sounds like you have injector problems via you say it smokes , its tuff being a owner opp these days, i have a 3406c peec cat that i want too convert back to mechanical but ia'm affraid if i get caught here in calif. they might offer me a firing squadand also welcome to the diesel garage there are alot of great people here that can help you , gust keep trying and asking reasonable questions and help some else if you can

Last edited by fest777; 02-05-2011 at 11:32 PM. Reason: forgot too welcome new member
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Old 02-06-2011, 12:31 AM   #3
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The DD should not be smoking. Who know how the over head is but the air/air needs checked for leaks from turbo to the head.Another thing is i would pull the exhaust pipe off of the turbo and with a good light look at the exhaust wheel for missing tips on the fins. Also that turbo could have wastgate but do not remenber. If it does make sure the linkage is not broken on the wastgate.The camshaft is easy to get out of time if some one has had the cam gear off of the cam.If the manifold is cracking there is a timing problem or a boost leak. I am thinking as if it has the proper program in the ecm and proper injectors.Boost leaks can be found on the cooler as well as the piping and the intake hose to the air compressor.If the manifold has cracked from heat then the turbo may be gone .All of this can cause the engine to burn oil. A bad turbo bushing can cause some blow/by.
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Old 02-06-2011, 12:56 AM   #4
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oil leak on a dd I allways check flywheel housing first. You can have a bad inj how many miles on this truck?
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Old 02-06-2011, 01:54 AM   #5
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are you running a pyrometer sounds like its over fueling big time iam not much on detroits you could have a bad injector seat or oring leaking, how is the oil pressure ? oil in fuel can do a number on your bearings, is the power o.k. ? sounds like you have injector problems via you say it smokes , its tuff being a owner opp these days, i have a 3406c peec cat that i want too convert back to mechanical but ia'm affraid if i get caught here in calif. they might offer me a firing squadand also welcome to the diesel garage there are alot of great people here that can help you , gust keep trying and asking reasonable questions and help some else if you can
The pyro probe went out on me, but I can tell you that it never ran hot unless I was out west.
I've had others tell me that I have a bad injector, and very well may. Just been trying to keep it going to pay for parts.
Oil pressure is down now. Sits about 43-44 when cold, but as it heats up it drops. I wasn't extremely concerned when it held around 38, but now it's down to 30 when all warmed up and running and won't go up. I'll be changing the oil again before I go anywhere with it, I'm at 8000 mi.
Power was holding great. It would out pull anything around it at gross. Threw me a code last week, 2-5, which is 'no codes' according to the manual. Even dealer is stumped by that one.
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Old 02-06-2011, 02:02 AM   #6
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The DD should not be smoking. Who know how the over head is but the air/air needs checked for leaks from turbo to the head.Another thing is i would pull the exhaust pipe off of the turbo and with a good light look at the exhaust wheel for missing tips on the fins. Also that turbo could have wastgate but do not remenber. If it does make sure the linkage is not broken on the wastgate.The camshaft is easy to get out of time if some one has had the cam gear off of the cam.If the manifold is cracking there is a timing problem or a boost leak. I am thinking as if it has the proper program in the ecm and proper injectors.Boost leaks can be found on the cooler as well as the piping and the intake hose to the air compressor.If the manifold has cracked from heat then the turbo may be gone .All of this can cause the engine to burn oil. A bad turbo bushing can cause some blow/by.
The over head was ran about 20k ago. I've checked the air/air and all seems good. Turbo is new and not 'blowing' oil. New air filters took care of that. Does have WG, not broke. And as far as I know, no one has messed with the cam. If they have, they did a great job putting it all back with old gaskets and such.
I'm not sure how, [i](keep scratching my brain)[i], but somehow oil is getting into the cylinder and out the exhaust, but it's not going through the intake. The oil thru the exhaust is obvious, just can't seem to grasp how it's getting there.

Last edited by Zeppe; 02-06-2011 at 02:12 AM.
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Old 02-06-2011, 02:11 AM   #7
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@OTT;
Flywheel housing is good, no leaks. I do have a leak in front of the pan, think it may be the crank seal on the front cover due to the 'spray' pattern of oil down the bottom of the pan but can't say for sure. I dropped the pan last oil change, scrubbed it clean and put in new gasket. I now can say the isolators need to be replaced, but there's not enough seepage for what I'm dealing with. That's an easy fix; should be able to get to that this time home.
No one is really sure how many miles are on this. It's a transplant out of an 01 Century. Detroit doesn't have any records of it after it was overhauled in 04 at 700k. I have been able to find the truck it came out of; it was rolled. My dealer bought it for parts and swapped it before I bought the truck, so I can only account for the past two years. The odometer shows 1.24mil.
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Old 02-06-2011, 02:30 AM   #8
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The oil in the fuel is checked buy adding oil dye to a pail of fuel Cummins Part #3376891, you do not need to add the full bottle, run it to circulate it threw the head. Block off the return and pressurize the primary filter, with the valve cover off you should see it with a flash light, a black light is better.
If you take it to a bigger Detroit dealer they can test you injectors, you may have one that if over flowing and breaking the manifold. While the injectors are out you can have cylinder leak down test done on each cylinder TDC and DTC. Then you will know, having the CAC and the intake pressurized will tell you if valve guides are the problem with blow by. The turbo can be tested on the compressor side they also will pass boosted air to the crank case. Just a thought!
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Old 02-06-2011, 03:02 PM   #9
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@ Johnp3;
Thanks for the info. Should oil start showing up in the fuel, I'll do that. Right now, it's only traces of fuel in the oil pan. Where it's getting by to get there is my mystery.
I've called my Detroit shop which is right down the street and there covered up until at least Wed. I'm trying to avoid their cost going through it myself, but I will need them at some point; electronics aren't my thing, but a pressure test would be helpful.
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Old 02-06-2011, 03:48 PM   #10
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I think JP3 got the phrase backwards , his test is for Fuel in oil
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