CM870 EGR replacement

[trucklogger2]

(05-21-2016 )tree98 Wrote:  Well it has been determined that I need a new EGR valve. So this afternoon I took the old one off and i'm in the process of trying to figure out 1. which tubes are the ones going to the delta pressure sensor? 2. where is the intake manifold temp sensor? 3. Is this picture the exhaust back pressure sensor pipe?(somehow the picture got turned sideways?) if it is does anyone have any idea's how to get the fitting out of the exhaust manifold? Looks like someone tried to get it out before because it's kinda boogered up. I wasn't able to get it loose and I'm pretty sure it's gonna end up rounded off if I keep trying. Should I cut the pipe and try to get it out with a socket then just buy a new pipe from cummins ? maybe heat the manifold with a torch?

As Rawze pointed out before, remove exhaust temp sensor, replug it while it is off, start the engine, put your hand over the sensor hole,feel for exhaust flowing from the pipe and hole. If you feel "air" exiting then your pipe is not plugged, move on.