CARB DPF Retrofit

Seems to me like a retrofitting an older truck would be sooting up the oil really badly and shortening OCI's. And how reliable can an older engine not designed for a dpf be, not just the engine, but as posted above the dpf plugging up? Seems like it would be a maintinence nightmare. Never even heard of anyone retrofitting where's the info comments, complaints, etc out there on anyone who's actually done it?

 

A DPF traps and then burns off the "soot". It doesn't throw it back into the engine in most cases. EGR does that, and quite badly in some cases.
All this is, is an extra exhaust part that filters the gases from the exhaust. At a certain level, it burns them off (regen). This goes out the exhaust not back into the motor.
The only real issues, assuming installed correctly, would be the filter plugging up. The clogged filters are a nightmare on our company trucks' Cat motors. Either the motor is burning too "dirty" and clogging the filters, or there are other issues. I would guess crap sensors myself, but they are under warranty thus I dont hear what was wrong from the drivers I know that are having issues.
I certainly wouldn't entertain the idea myself, but then I don't rely on Ca for my living so it's a no brainer for me.

Martin

 

Extra backpressure on the exhaust is going to load the oil up with soot. I took the plugged up factory original baffled mufflers off my truck long ago, back then I did regular samples on oil changes, and soot levels in oil samples dropped. Oil that looked like honey for 5,000 miles started looking that way for 7,000 miles. For all practical purposes adding a dpf is like adding a muffler....

 

100% agreed with more back pressure etc. I thought you meant an EGR setup, sorry!

Martin

 

Good analogy:

Try sticking a few paper towels up your butt and then farting.



BAD IDEA!

 

Or the EGR analogy....Fart into a container then hold it against your face for a few minutes...

Martin

 

The company I worked at bought 10 new 2008 Petes with Cats when they first came out. The fuel mileage on the best one was almost 5.5, the worst one 3.4, yes 3.4 at any speed, any weight. The trucks were always in the shop, eat all the profits in fuel, and almost bankrupted the company. The only thing that kept them afloat was the 15 or so 2005 model trucks with well over 1 million miles each. They ended up selling those new trucks at a hugh loss and bought used '07 Petes with pre DPF engines.

Cat got most of the bugs worked out, but never did get the fuel mileage up on the '08s.

 

I think if I were contemplating a dpf truck, I'd bite the bullet and go new with scr. Those trucks are getting far better fuel mileage and supposedly are having less issues than the EPA 2007 trucks. A bigger payment is nothing when you are talking 5.5 vs 7mpg. At 2500 miles per week and $4 fuel, that is $390 a week in savings.

 

I would mount the darn DEF tank on the truck and pretend that it's doing it's job...