Being black does not hurt a thing. It is just microscopic soot. I use Amsoil synthetic in my Cummins for 20,000 miles. Drain it and then use it in my 72 Chevy 350 engine. The Amsoil takes care of the 350 and I have been using the used oil for 5 years. No problem. In fact, when I first got the 72, itsmoked. After using the old Amsoil out of my cummins...it quit smoking and did fine!!
@don shields, Yes, I agree, the black does not exactly mean a problem, or concern. Matter of fact, you can change oil, start the engine, to check level, and it's already turning black. From that microscopic soot, you were talking about, it's all over the cylinder wars, and finds it's way passed the rings & valve seals, injecting itself to the oil. And that is very interesting, about using the used Amzoil for your chevy 350 cid. Thats AWESOME... I believe it, that Amzoil is a highly engineered synthetic, that has some amazing propperties, that help it. One it is very expenssive, 2 it's suppose to last 15K-20K miles, between oil changes. That by itself, says a lot. Also, just a quick statement, the black that I'm talking about, is in reference, to how dirty the engines that I open up, look like. For instance, Duramax's are some of the cleanest engines, when you open them up. Cummins & Caterpillar (specially Cat), are super dirty when you open them up. I believe that has to do, from a combination of Injectio Process (pragramung strategy), and positive cranckcase breathing system configuration. I have opened up hundreds of engines over my 23 years of doing this. And I have always paid attention to that. Even on gasoline engines, and the differences I see. Also, this one has a possible explanation, from something else I have seen. This engine had an oil leak, and from what I have noticed, most engines with extended periids of oil leaks, start building a little sludge, and like this one, flacky dry oil on the inside of timing cover. I believe the leak, when not running turns into a vacuum poibt for atmospheric pressure, which I believe oxidizes the oil. Just my big brain cap, not staying on my little head, kind of thinking. Meaning, Im no engineer, just my ASSumption.
@@smallhandsgarage9290 yes...I can very quickly go along with your analysis of the oil leak and moisture causing oil breakdown. I think you are correct. Have a great time solving problems and helping the diesel community! Thanks.
Well I will say on a mechanical side of it , been a car guy an a contractor, been a ford guy had 2 diesel trucks with the 7.3 . The last 01 was all I could imagine as a long running truck with that crazy power of pulling. (With all the up grades) so I got my first dodge a 06 cummins. What a oil mess. My power stroke at 300k was cleaner then this 06 cummins at 267k that is giving a oil bath from the front cover. An hey! I'm not bashing. With what garbage I seen dodge is, I still plan on building a 05ish super duty with a 12v cummins an the zf6 trans.. a lot less problems and no modern technology crap. Plus I did some research. My 490hp 7.3 was around 1100 fq a 12v at 500hp puts down 1600 fq an is less than half the cost to get it there. Ha but the conversation will rap the cost 5k
@mattschmitt4038, The Front Main, was leaking. And the case seal was leaking as well. Customer told me, eventually, that they had work done in Wisconsin, from a family friend. They were not sire what was done... The Front Main had RTV on it, and the sealant on the cover, were 2 different types (original cummins, and aftermarket silicone. You can tell by the color & the smell.. But they had a constant leak from the Front main, the other leak, they wanted to take it back for warranty...
@@smallhandsgarage9290 Yes some guys put some rtv there to stop it but is it’s the case they have to pull the cam lifters ect it’s a big job just for a gasket.
A ford is cleaner because it’s taken apart more times
Good stuff.
Being black does not hurt a thing. It is just microscopic soot. I use Amsoil synthetic in my Cummins for 20,000 miles. Drain it and then use it in my 72 Chevy 350 engine. The Amsoil takes care of the 350 and I have been using the used oil for 5 years. No problem. In fact, when I first got the 72, itsmoked. After using the old Amsoil out of my cummins...it quit smoking and did fine!!
@don shields,
Yes, I agree, the black does not exactly mean a problem, or concern.
Matter of fact, you can change oil, start the engine, to check level, and it's already turning black. From that microscopic soot, you were talking about, it's all over the cylinder wars, and finds it's way passed the rings & valve seals, injecting itself to the oil.
And that is very interesting, about using the used Amzoil for your chevy 350 cid. Thats AWESOME...
I believe it, that Amzoil is a highly engineered synthetic, that has some amazing propperties, that help it. One it is very expenssive, 2 it's suppose to last 15K-20K miles, between oil changes. That by itself, says a lot.
Also, just a quick statement, the black that I'm talking about, is in reference, to how dirty the engines that I open up, look like.
For instance, Duramax's are some of the cleanest engines, when you open them up. Cummins & Caterpillar (specially Cat), are super dirty when you open them up.
I believe that has to do, from a combination of Injectio Process (pragramung strategy), and positive cranckcase breathing system configuration.
I have opened up hundreds of engines over my 23 years of doing this. And I have always paid attention to that. Even on gasoline engines, and the differences I see.
Also, this one has a possible explanation, from something else I have seen. This engine had an oil leak, and from what I have noticed, most engines with extended periids of oil leaks, start building a little sludge, and like this one, flacky dry oil on the inside of timing cover. I believe the leak, when not running turns into a vacuum poibt for atmospheric pressure, which I believe oxidizes the oil.
Just my big brain cap, not staying on my little head, kind of thinking. Meaning, Im no engineer, just my ASSumption.
@@smallhandsgarage9290 yes...I can very quickly go along with your analysis of the oil leak and moisture causing oil breakdown. I think you are correct. Have a great time solving problems and helping the diesel community! Thanks.
Well I will say on a mechanical side of it , been a car guy an a contractor, been a ford guy had 2 diesel trucks with the 7.3 . The last 01 was all I could imagine as a long running truck with that crazy power of pulling. (With all the up grades) so I got my first dodge a 06 cummins. What a oil mess. My power stroke at 300k was cleaner then this 06 cummins at 267k that is giving a oil bath from the front cover. An hey! I'm not bashing. With what garbage I seen dodge is, I still plan on building a 05ish super duty with a 12v cummins an the zf6 trans.. a lot less problems and no modern technology crap. Plus I did some research. My 490hp 7.3 was around 1100 fq a 12v at 500hp puts down 1600 fq an is less than half the cost to get it there. Ha but the conversation will rap the cost 5k
Was this the actual cover leaking or the case gasket behind? Looks to me like that case gasket is leaking where they are known to fail.
@mattschmitt4038,
The Front Main, was leaking. And the case seal was leaking as well.
Customer told me, eventually, that they had work done in Wisconsin, from a family friend. They were not sire what was done...
The Front Main had RTV on it, and the sealant on the cover, were 2 different types (original cummins, and aftermarket silicone. You can tell by the color & the smell..
But they had a constant leak from the Front main, the other leak, they wanted to take it back for warranty...
@@smallhandsgarage9290 Yes some guys put some rtv there to stop it but is it’s the case they have to pull the cam lifters ect it’s a big job just for a gasket.
What’s a job like this typically run?
$4000