Turbocharger HT3B 3529040 3801939 Cummins NTA855-P

You’ve already removed the intake system, and now you need to remove the exhaust side connection. This can likely be the most difficult part of the entire process. If you have the time, use some penetrating oil on the V-band connection or the bolts that connect the down-pipe leading from the turbine housing to the exhaust. If you need to remove bolts, it may be beneficial to use a blunt chisel and lightly tap the head of each bolt several times to set up vibration to ease the removal. These bolts can be quite difficult to remove because of the high heat environment. With the exhaust removed, the oil inlet and drain connections should be located and removed. The oil inlet will be the easiest and is typically either a threaded pipe-type connection or an inlet pad using two bolts.