Exhaust wrapping, DP owners, take a look.

Gents,
First of all, thanks a heap for all the nice comments. I certainly appreciate it. Second, a question was asked about "why" it's done in the first place. Well, we all know any exhaust, on any engine, is HOT, CORRECT? Well, the radiated heat, from that section of the exhaust, is in, sort of a "tunnel" or, semi-confined area that you see in the upper part of the picture.

There is some electrical wiring, rubber hoses, plastic parts, plastic wiring loom and more. Now, most of which is fairly heat tolerant. But, let's face it, coming right off the turbo, that part of the exhaust is SERIOUSLY HOT, especially on long grades, in 100 degree + weather, TOWING A TOAD, etc. So, needless to say, even the heat tolerance of much of those components in that are, need some "extra" protection from that kind of heat. Hence, the exhaust wrap. And, while that fan on the CAT is a direct drive fan, and is turning all the time, there are some areas that do not get all that much air movement. That area is kind of blocked off, so to speak, because of the structures in between it and the fan. So, the fan can draw air from a less obstructive (hope that's the correct word here) area.

Dennis,
If you look closely at that picture, (and as we all know, pictures do not always show true definition and or, perspective) you'll see that the close proximity of many components, i.e. engine block, trans front end, hose-holding bracket, and other parts, would make the movement of hands, holding a roll of wrap, incredibly hindered. And, even when that pipe, was clamped to my work bench so it could not move, doing a TIGHT wrap and, keeping it as tight as possible, was a bit of an effort, but doable. Trying that same feat, in those tight, very awkward conditions, was to me, impossible.

Brett,
Good evening. I'm listing below, what I think was the exact site, on ebay, that I purchased my 4" wrap from. I'll go dig around in my ebay files and make sure. But, I think it's the one.
Scott
4" Fiberglass Exhaust Wrap

I logged into Accessfreightliner.com and dug around and found the exact part, Freightliner calls it a "Heat/sleeve". It has a part number and everything. But, I just simply chose to go this route. Now, again, we'll see just how this particular wrap, will hold up to the intense heat of this section of pipe, just downstream from the turbo. I do have the Arrow 5050XL Stainless Steel straight through muffler so, the back pressure is somewhat down from the stock muffler which, should mean less heat "build up" in the system. That's my theory anyway.
Scott

In general, this little project, in a difficulty scale of 1-5 and 5 being something equivalent to say, pulling a radiator to clean the fins and 1 being something equivalent to say, changing a fuel filter, this is about a 2 in my opinion. The pipe weighs about 6-7 pounds without the wrap, about 7-8 with it. So, it was not heavy or cumbersome to work with. The primary reason I needed two people on the installation of it was because I couldn't hold the pipe flange in place, coupled with the output side of the exhaust brake, and, install the V-band clamp. I need the wife to hold it in place while I tucked this fat, overweight body, into places that I wasn't sure I could get out of, and, be able to manipulate my arms and hands, to install that V-band clamp.

Once the clamp was installed and lightly tightened, the pipe would be self sustaining and, she could vacate the area and I could then finish it all up which, took me no more than about 5-6 minutes total. Hope this answers most questions.
Scott

Just another question, Scott...why couldn't you simply slice the wrap lengthwise and wrap the pipe without removing it? The clamps would still hold it in place. You might have to use a couple more clamps, but it seems it would be easier...you've done an excellent job..Dennis

Cuts radiant heat in that area. That is likely the reason in this application.

Mark

Nice job, Scott.

Please post a link to where you got the 4" wrap.

Dumb question. I know wrapping decreases radiate heating. Why do they wrap it? What damage are they trying to prevent.

Nice neat job!