I have seen in recent posts about the #6 cylinder running hot, why does that run hotter than the others?

 

air flow to that cylinder is not the best

 

It's the last cylinder the coolant gets to.

 

Has anyone rerouted coolant externally to help cool #6? Is it really needed?

 

There is a part (cummins part) that bolts on the back of the block( or maybe head can't remember) in place of the existing freeze plug.

I have it on mine. With a 5/8" heater hose back to one of the other heater hoses. I actually have it routed through a coolant filter. So basically it keeps the coolant from dead heading back there.

If you do some searching you'll be able to find the cummins part number. I don't have it handy.

 

Does you rig run hot? Is there a reason that you are worried about it? Just wondering...Mark

 

Mine does not run hot, i have seen this done in other applications though.