Engine/Transmission (1994 - 1998) Front main seal question

[yenga80]

I just tabbed my KDP last night; put it back together reusing the old crank seal that appeared to be original. Today it looks like I still have a small leak developing at the bottom of the timing cover (direct underneath the crank). I probably will wait to replace it until I get a new cam and then do it all at once. My question is where is the best place to source a crank seal. Does cummins make the best or can I get one of equal quality at the local auto parts store? thanks guys. Really enjoying the site again.

 

[ABennin]

I put a new seal in my 2000 when I put in a cam and I used a National(Federal Mogul) 39803. From what I have found it should fit all 5. 9's. I got it from my local mechanic. Also the leak could be from a groove that sometimes forms on the crank over time. If that is the case you will need a speedy sleeve. Mine did not require a sleeve, so I can comment on that part. But I was happy with the seal kit.

 

[ewcmr2]

When I installed my camshaft I seem to recall getting front cover seal kit at the local parts store. Fel-Pro brand, it had the crank seal, PS/Vacuum pump gasket, gasket between timing gear case and block, injection pump gasket.

A quick search didn't find part number though.

 

[Bob4x4]

The Cummins seals are to be installed dry..... so it is never a good idea to try and reuse

 

[hsmith]

And, the seal can be damaged when you install the cover if you don't use the plastic sleeve-guide that comes with a new seal.

 

[MLee]

And to answer your question, I got mine from Napa when I did mine. As stated install DRY on a clean crank.

 

[Matt42]

The Cummins seals are to be installed dry..... so it is never a good idea to try and reuse

I used the Cummins seal. It's bloody simple and easy, if you follow the instructions and use the guide that comes with it, and take your time. To be safe and avoid a leak, it's probably a good idea to use a new seal whenever you have the cover off. BUT . . . it's equally possible that your old seal might stop leaking on its own once it reseats itself to the crank. If the leak isn't bad, you can drive it for a while and give laziness a try.

 

[KRStone]

Also the leak could be from a groove that sometimes forms on the crank over time. If that is the case you will need a speedy sleeve.

No, if the crank has a groove: just install the seal in the timing cover either deeper or more shallow so the new seal doesn't ride on the groove in the crank.



When using the centering plastic sleeve guide, I had some difficulty pulling mine out of the seal/crank gap. I'd recommend a sheet or two of cardboard on the inside of the radiator to prevent any dings/dents in the radiator.

 

[ABennin]

I suppose you could install on a different spot. Just make sure it don't move when you install it. When ever I installed them, the kit came with a tool to set the depth of the seal in the cover.