MOAGGIE

I started back in the summer drive semi's for a guy and he had been running all '07 Kenworths with 435 Cats in them, he got his new truck in this week and '08 Kenworth with a 475 Cummins! Said KW couldn't make a CAT that could meet KW's emission standards. Man, I can't hardly believe all the new emissions equipment on it. It looks like all the other KW's (on the outside) except for the Cummins and the weird looking stack. I'll try and get some pics of it ,it is something different. Anybody seem one of the new KW's with the Cummins? what do you think? Supposedly it is will get better mpg's once broke in then the smaller CATS he currently runs.

DmaxEter

Its not a stack anymore! Its called a defuser!

94Stepside

my dad works for a Truck reparir shop, from what i hear over there, 07-08 Cummins are a better choice than the cats from a # of problems perspective.

confused89

1. Cat cannot meet the emission requirments for 2007 right now. They are paying $6,000 an engine fine for putting them in trucks and selling them.

2. That weird looking stack, the larger round part is the Diesel particulate filter. This is where all of the chemical reaction takes place that reduces the emissions from the engine and it is also where the soot is caught and also where it is burned off. The very tip of the exhaust is larger because it is trying to disperse the heat and emissions to a larger area instead of keeping it in a tight group as it leaves the truck.

3. I have been driving a 2000 model Kenworth T-2000 with the 2007 emissions on it for research for the past 4 weeks. The truck I drive is beat up and it has a few problems. The engine has a 500 hp calibration in it and it pulls very strong. The engine mechanically has no problems at all. I can't tell you about the rest of the truck.

4. The 07 ISX gets about 1-2% better fuel mileage over previous ISX version.

Please read all of this, if you don't then go to page 28. It shows what you should be talking about.
http://www.cumminsfiltration.com/fil...t_training.pdf

MOAGGIE

WOW..that is some interesting reading. It looks like the boss may not be having us service his truck for some things on it. Thanks for the link, now I will know more about the emissions on the truck than my boss.

confused89

You can service everything on the truck without any special tools. They would just like to sell you the specialty tools. You can blow out the dpf with a air nozzel from the otlet side to the inlet side, not the catlyst itself but the second section in the line. You are only suppose to blow it out at 30 psi. The emission system may look monsterious but there is nothing in there that you can't handle.

I think that your boss will love the engine in that truck.