I know there is a correct and incorrect valve seal but I don't know what they look like. Could someone be kind enough ton post up some pictures of the right and wrong ones please.

 

Hang tight, Bill! I'm looking through my collection.

Edit: These are the incorrect valve seals that came in the upper engine gasket set that myself and 93flatbed ordered. Well, they were incorrect at least for mine and 93flatbed's motors. They just didn't fit over the valve guide boss. Cummins was good to me and allowed me to return them with a refund of their cost. IIRC, Justin (93flatbed) was able to get the correct ones from Cummins. I looked through some threads that I know had a post from him with the correct part numbers. Hopefully, he'll jump in on this. Otherwise, I'll keep looking.



Most engine builders should have generic seals that will work just fine. That's what the machine shop/engine builder installed on my head after machining and a valve job. I forget the size but 11/32" comes to mind for either the intake or exhaust valves. Not to mention, they were cheap. Something like $0.10 each.

 

The ones I got from Mumua diesel were the correct ones and were orange colored if that helps.

 

Thanks guys

 

Yeah, Jeff will get you what you need!

 

Jim I think its in your thread when you and I were trying to figure out mine, as Jim said my Cummins dealer flipped the bill to over night the correct ones for our heads. This is the number I have 3921640. Good luck with the build, what all you gonna do?