Hello, I have a question about the KDP. Where I work, we have been installing 4 and 6bt cummins engines in paving equipment since 1985. I was just on a machine that had 15763 hours on it and they swore the motor had never been touched. It seems that all of these 5.9's run forever. Last fall I rebuilt a 6bt for my dad's road grader(87 with VE), and at the time, was oblivious to the KDP. Could it fall out? Untill getting into the dodge pickups I had never heard of it, is it a dodge only problem? Does it have to do with the p7100?
Thanks
Curt

 

Curt, I think that's an interesting question. I don't frankly have a clue as to whether the engines Cummins produced for Dodge for their use in light trucks were a different production run than those for industrial use, or if the industrials have a different timing case setup.

I don't see how the injector pump could have anything to do with that dowel pin, though - my understanding from doing a LOT of research and archive reading is that the KDP problem was with a manufacturing run of the locating pins being very slightly undersized. It's not a numbered part, so not trackable - the 12v engines may or may not exhibit the problem with the pin working out of the timing case. I did the tab on ours and replaced the crank seal at the same time - it was beginning to seep a bit anyhow.

 

I know for sure the 5.9s used in UPS trucks have been plagued with KDP failures.
In fact they even had a campaign to jig fix them all.

 

Just wondering if I should worry about ours?? If it has ran 20 years without falling out maybe it's ok?

 

Maybe is like playing Russian roulette with your motors

 

I'm not sure if the 1st gen 12v's had kdp issues... It's a real easy fix though. So I'd go ahead and tap it anyway.

 

ya man ,its just gonna be in the back of your mind forever until you fix it now anyways.Its nice to clean everything up and put the new front main in anyways

 

if its a 12 valve, I'd check it. Plain & simple