I have my engine out and all the lines are real rusty, can you make your own out of copper. and any idea which tubing to buy or where to buy it?

 

I ordered a complete set for my truck about a year ago, but Mopar was showing them as discountinued and for a couple of them I got what was listed in the computer as the last ones existing in the US.

I'm showing the Cummins part numbers for the two long ones going across the top of the engine to be: 3912086 and 3912087

And I'm showing the Cummins part numbers for the other two (running to and from the under-turbo tranny cooler) to be: 3914823 and 3914824

Cummins is unlikely to discontinue parts the way Mopar does.

Good luck.

 

I wouldn't use copper. It will work harden from vibration and crack eventually.

 

If you cant buy them, get thin wall steel tubing from a steel yard. A 30 dollar tubing bender and make them, its not hard but does take a bit of patience. But Dave is right, copper isnt a good option.

 

You could get a set of used ones from out west where they don't have the rust problems. That’s what I did.
Jim