Possible Front Crank Seal Leak - Dodge Cummins Diesel Forum
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post #1 of 5 (permalink) Old 04-21-2017, 06:17 AM Thread Starter
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Possible Front Crank Seal Leak

I think thats what leaking.. Its hard to see in the pic, but it comes from behind the crank pulley and onto what I believe is the timing cover. I have less than 5,000 miles. I clean it, and it slowly comes back after a couple hundred miles. Im gonna bring it in, just wondering how big a job it is, and how much has to come apart to repair it.. Thanks




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post #2 of 5 (permalink) Old 04-21-2017, 07:40 AM
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Possible Front Crank Seal Leak

I had the front crank seal replaced on my 05 four or five times before it stopped leaking. I had to take the truck to a second shop before it was done right. It is not easy to line it up and it was pinched. Never leaked again. I took the truck to a shop that worked mostly on Cummins trucks in farm country. The first misaligned seals had also scored the crank. They had to sleeve the crank to get the last seal to work. On my 14 i kept wiping the fluid off and it stopped and was probably assembly lube of sorts. On my 15 only one drop ever formed and i wiped it off and it never came back.
There is a second seal there also. I think it is the timing cover seal, if i am remembering the name correctly. That one requires many parts be removed to replace it. A friend of mine had his done and they had to even pull the cam to get it done. At your mileage i would not want the more difficult seal replaced just yet. There is a possibility it is still assembly lube. Good luck.

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post #3 of 5 (permalink) Old 04-21-2017, 08:18 AM Thread Starter
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Originally Posted by Jared Herzog View Post
I had the front crank seal replaced on my 05 four or five times before it stopped leaking. I had to take the truck to a second shop before it was done right. It is not easy to line it up and it was pinched. Never leaked again. I took the truck to a shop that worked mostly on Cummins trucks in farm country. The first misaligned seals had also scored the crank. They had to sleeve the crank to get the last seal to work. On my 14 i kept wiping the fluid off and it stopped and was probably assembly lube of sorts. On my 15 only one drop ever formed and i wiped it off and it never came back.
There is a second seal there also. I think it is the timing cover seal, if i am remembering the name correctly. That one requires many parts be removed to replace it. A friend of mine had his done and they had to even pull the cam to get it done. At your mileage i would not want the more difficult seal replaced just yet. There is a possibility it is still assembly lube. Good luck.
Thanks

How many miles did your 14 have before it finally stopped?

The fluid is black, so I don't think its assembly lube.

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post #4 of 5 (permalink) Old 04-21-2017, 12:03 PM
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Possible Front Crank Seal Leak

It stopped at the second oil change about 14,000 miles. But it was more clear with dirt than the oil that is from the motor that is black. On my 05 before the first seal replacement it continually got worse.

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post #5 of 5 (permalink) Old 04-21-2017, 01:02 PM Thread Starter
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Ran by my dealer and they looked at it. Said the front crank seal is starting to leak. Not a big job in their eyes... Radiator and a few things come out, and new seal goes in.. Sucks for me, but not the end of the world..

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