12 Valve Engine and Drivetrain Talk about the 12V engine and drivetrain here. This is for 1994-1998.5 engine and drivetrain discussion only.

new timing cover gasket?

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Old Dec 30, 2004 | 01:18 AM
  #1  
mx261's Avatar
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From: wisconsin
new timing cover gasket?

wondering where I could get a new timing cover gasket or if I could use rtv gasket silicone? Planning on hunting down and killing some dowel pin soon.
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Old Dec 30, 2004 | 06:32 AM
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You may get away with using the old one (but I don't recomend it). You can get a new one at your local Cummins shop. Probably not a bad idea to hunt down a Cummins parts supplier near you anyways. It will save you a ton of money in the long run for parts such as your timing cover gasket, filters, etc.

To give you an example, a lift pump from the dealer is about $250. That very same pump from a Cummins part house is about $150.

Also look up international and case dealers. I believe the engine is used in many crossover applications and you can find some parts there as well. Often times a shop that works on some of the big rigs will have parts in a pinch as well.

I suggest you get a new gasket ( about 25 bucks) and you will need a new teflon seal for the crank. Cummins sells a kit with everything you need for the timing cover/kdp. I think around 50 bucks. Hopefully someone will post a part number.

The crank seal is a little tricky, it needs to go on with the crank TOTALLY DRY AND CLEAN! FREE OF ANY DIRT, RUST OR OIL! Make sure your crank is cleaned with brake clean and emery if needed. The seal is a press (tap in) in type deal. You also use loc-tite on the outside of the seal where it's pressed (tapped) in the cover. I wrestled with mine for awhile going thru the front of the cover. Ended up going thru the back of the cover and it seemed easier. Just take note of the position (depth) of the old one in the cover first (thats why god created digital cameras). Don't forget to use the little sleeve that comes with it to protect the seal as you put the cover back on the crank. Then the sleeve gets removed once it's on and in place.

A couple other things, make sure the bolt you use on the tab is hardened. Most hardware store bolts are not. If you can't locate a hardened bolt, then take one from some non critical easy to access part on the outside of the engine (oil dip stick to air plenum bolt? not sure if it's the correct size but you get my train of thought) and use that for the tab bolt. The bolt holding the tab needs to be a little longer than the original, and make sure it and the threads on the timing housing are clean (brake clean) and use loc-tite.

Also it's a good idea to remove (one at a time) and clean and loctite all the bolts that hold the timing housing on. You can see some of them with the cover off. Others are behind the timing gears, and you can locate them by rotating the engine over (use the alterntor nut and rotate engine backwards-go foreward and the belt slips). Although rare, I have heard of a bolt coming out and doing dmage like the kdp. Takes longer to do, but peace of mind.

Here are a few links to keep ya busy for awhile. They include bolt size, seal installation, part numbers, etc. Good luck, Kevin

http://dodgeram.org/tech/dsl/Dowel_Pin/tab.htm

http://www.turbodieselregister.com/f...=77614#newpost

http://www.turbodieselregister.com/f...4&page=1&pp=15

http://www.turbodieselregister.com/f...&threadid=1497

http://www.turbodieselregister.com/f...threadid=19627

http://www.turbodieselregister.com/f...&threadid=1436

http://www.turbodieselregister.com/f...threadid=52152
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Old Dec 30, 2004 | 11:58 AM
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From: Seattle, WA
Cummins gasket p/n 3918673
Dowel pin tab p/n 3958017
You will also need a new crank seal p/n 3804899
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Old Dec 30, 2004 | 01:35 PM
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From: Left Coast, (Right Wing)
Nice post guys!
Also TST sells a KDP kit heres the link http://www.tstproducts.com/index.asp...ProdID=64&HS=1 $48.00 was the route I choose worked well for me. They got it to me real fast too.

Perhaps I was lucky, I left the original seal in place as it was stuck pretty nicely to the cover when I took it off. Added a film of silicone to it after it was cleaned of oil and has not leaked a drop.
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Old Dec 30, 2004 | 09:34 PM
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From: wisconsin
Thanks guys!! I have another post about hard starting and lots of smoke. Just wanted to add that after changing the fuel filter all is good! Anyway ill be getting to the kdp soon so thanks again for the info!!!!


Happy New Year!!!!!!!!!!!!!!!!!!!!!!!!!
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Old Dec 30, 2004 | 10:03 PM
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From: Where water boils at 193.4°
When I did the tab on my 1997, I reused the gasket and the seal. It's still not leaked a drop. But it would be good to have both on hand just in case you can't reuse yours.
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Old Nov 10, 2006 | 12:19 PM
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Originally Posted by MikeR
Cummins gasket p/n 3918673
Dowel pin tab p/n 3958017
You will also need a new crank seal p/n 3804899
Can anyone verify the Cummins crank seal part# I jaut got my Genuine Cummins Part crank seal and the number on it is # 3937111. I ws planning on doing this in the morning but I dont wanna get it tore apart and find I have the wrong part. I live about 20 miles from town. Thanks.
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Old Nov 10, 2006 | 03:49 PM
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The part number 3804899 is for the front crank seal kit, which includes the crank seal, the install tool, and a black dust seal. I just got this kit last month from Cummins and it was correct for my 96 12-valve. The 3937111 part number, may just be for the crank seal itself, without the kit, I don't know.

If you are removing the timing cover, you need the install tool to bottom out the seal correctly, so if I were you I would get the seal kit. Good luck.
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Old May 24, 2007 | 12:51 PM
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cummins makes a KDP kit also? part # anyone?
or does anyone know the part # for piers KDP Kit?
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Old May 24, 2007 | 01:16 PM
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From: Santa Cruz, CA
Originally Posted by MikeR
Cummins gasket p/n 3918673
Dowel pin tab p/n 3958017
You will also need a new crank seal p/n 3804899
Are you saying Cummins makes the tab? Why didn't they install it at the factory if they make the tab?

Do you have a part # for the longer bolt?
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Old May 24, 2007 | 06:48 PM
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infidel's Avatar
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From: Montana
Originally Posted by b.lee
cummins makes a KDP kit also? part # anyone?
or does anyone know the part # for piers KDP Kit?
Don't think Cummins offers a kit but they have all the parts separately including the tab - Dowel pin tab p/n 3958017
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Old May 24, 2007 | 06:55 PM
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b.lee's Avatar
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From: S.E., Michigan
what about the longer bolt needed to install the Tab?
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