I got my kdp tabbed and case bolts loctited and advanced my pump a tooth. So I got a new front cover gasket and front crank seal kit # 3804899. The kit was around $50 and it came with the plastic install sleeve the seal and a metal plate you put on the end to get the seal straight. But it also came with another seal that looks like a tapered o ring. On the tst instructions it said to put this seal on the outside of the crank seal after you put it in but it just slides over the crank and it'll spin with the crank right? If ya ask me it seems like just more of a chance to capture dirt and junk and wear into the crank seal. So I was figuring on just leaving it out. The original seal never had this so I was just wonderin if it was necessary or what its purpose was.

 

Sounds like you got a seal without an integrated dust shield.

 

I don't know. The crank seal was just like my old one that was in it with the metal ring and the seal inside/behind it. When it came in the box, this rubber O-ring deal wasn't inside the package, it was just sitting on top of it inside the box. Where would this normally go?

 

Possibly for the oil fill tube?

 

no its not for that. It is this tapered seal at the very bottom of the page, figure #5
http://www.tstproducts.com/DowelPina.pdf

It acts like its just another dust shield but I put my crank seal back in a little farther since I had a slightly grooved crank, and this just slides tightly over the crank, but it fits the crank tight so it would just spin with the crank right? and rub against the metal part of the crank seal? Unless I siliconed it or loctited it to the metal part of the crank seal to keep it from turning with the crank. I'm thinkin about just leavin it out since my old/original seal never had this. Just wanna make sure its okay.

 

"Before you re-install the damper, install the black rubber dust shield that was included in the 3804899 kit. This shield fits snug on the crank with the large diameter side of the shield touching the metal face of the crank seal as shown in Figure 5. Proceed with damper installation."

If it's snug on the crankshaft like they say, I'd agree that it would spin with the crank. I ordered my kit from Geno's and got a Cummins seal with the white dust shield built-in but no rubber dust shield. Must only be from Cummins when ordering the 3804899 seal kit.

 

Well I think I'll just leave it out cuz it will either eat at the seal or if i glue it to the crank seal to keep it from spinning it will be sitting right over the groove and catch more dirt in there and wear the groove even deeper.

 

Your not talking about the clear plastic "guide"?

You put the guide over the end of the crank, Then line the timing cover up to it. The guide prevents damage to the seal. After it's on, you pull the guide out and throw it away.

 

It's a dust ring. I don't have any issues using them on many engines.

 

No I'm not talkin about the plastic guide, I figured that part out and it slipped right on. I just left it out so hopefully it'll be fine.

 

The dust ring I believe is for `heavy duty` applications....I did some reading and have left my last couple off..

 

Found these pics to show where the new seal sits in my front cover. You can see where the original seal rode on the crank which would have put the outer ring of it flush with the cover. It looks like there's a small groove on the crank but I couldn't feel one .