Bringing back an old thread as I am doing the dpf tomorrow. I loosened most of the bolts tonight and the exhaust system started to droop. So , a couple of questions:
I assume I start at the tail end. There is no unbolting the hanger by the tailpipes - they are welded. Any trick to getting this section of the pipe off?
I did undo the bolts on the pipe between the tailpipe section and the dpf. There were 3 on each side and I hammered out the studs. This section of pipe fell away.
I loosened the nuts on the outer part of the frame holding the DPF section.
I loosened the easier of the two (toward the center of the truck) nuts on the coupler from the downpipe. I have no idea how I am going to get at the one closer to the framerail. The post above says get at it from the top, but there is no room over the top of te frame. Any suggestions??? Once I get this one, the whole thing will come down.
One thing I did mess up was not unplugging all of the sensors and the def injector... I have to do that first tomorrow.
Any other tips would be greatly appreciated. Oh ... and 30 mins my ***!
glad to know I wasn't the only one who stumbled through it the first time... It's not as bad as it seems, although about 45 minutes into it I was getting irritated... In the end a few beers and deep breaths and it was easy.
You've got a good start. For the tail pipe... I took that off first, lube up the metal hangers that are welded to the section, wd40 works...I ended up using the dielectric grease that I put into the connectors because I forgot to bring some up to the shop that day. Once lubed, the hangers will pop right out. A ratchet strap also helps to pull it towards the tailgate and out of the rubber hanger.
Next part is the pain, undoing to the down pipe clamp. I ended up getting the one against the frame with a long a$$ extension, flex adapter, and a blood drained arm from reaching way up and around the pipe. Took some patience, a few scrapped buckles, and some cuss words but comes out fine...obviously the reverse order when outing the new exhaust on.
Then just as you already did, unbolt all the other hangers directly from the frame rail, don't worry about pulling the hangers out until it's off the truck, much easier. If you haven't done so already, double check that you've disconnected every connector from the DPF befor you attempt to drop. There's quite a few of them but better than ripping a probe or the def line out of the DPF.
If your by yourself, just lay on your back under the truck, support the DPF with your hands and knees and lift the bolts out of the frame. Then just roll it to your chest and off to your side, it's heavy but manageable.... Just don't smash your face or nuts.
From here it's all off, install the new exhaust starting at the downpipe and working back. Depends on what exhaust you have, you may have to play with it to get the tail section and axle dump..I think I had to put the axle dump on with the main section off or loosened, can't remember. I bolted all the hangers back up before installing the new exhaust, it was easier to hang that way then trying to line up the bolts. Again, lube up the bolt/studs before putting them into the rubber hangers, makes it much easier.