Detroit 12.7 issues, cracked exhaust center sections

I had a Waterpump that broke the impeller, it would still somewhat spin. No play still tight, but had sheared inside. Only got hot on hills. Aside from a stuck thermostat, had a plugged up radiator would do the same. Now new 4 row stays nice and cool. American radiator copper about $950, bought tank separate for another $200. Little bit cheaper that way.

 

Get a ex. temp. gage put in instead of a plug so you can see how hot its getting?

 

Plugged rad will explain temp, but not fuel milage.

 

Excessive black smoke, melting stuff and running hot. Either you've got a boost leak, exhaust/intake restriction or you're getting way too much fuel into a cylinder/cylinders.

How's the valve lash and injector height? Set correctly?

 

There is a 1" rubber line that connects the air compressor inlet to the intake manifold. Make sure it has not ruptured. I have seen that rubber line fail on several engines and it always seems to rupture on the side facing the engine so it is easy to miss.