DPF problems.... Need advice.

[Hennessey]

I have a 2014 Kenworth T660 with a brand new in frame done at Kenworth, ($31000) and now I need some advice on a DPF situation. Reason for the the in frame was due to the old style rings in the ISX15, letting oil go through and clog the DPF filter. Kenworth wants $5000 to either replace or clean the DPF tank and replace the filter. I have a year warranty on the in frame. After a year, Ill delete it but just to ease Kenworth's mind about the DPF, I need to get one.

So, what would yall do in this case? Delete it anyways, or find a used one for now?

 

[Johndeere4020]

@pushbroom

 

[Hennessey]

?

 

[Electric Chicken]

?

That was the bat signal.

 

[Hennessey]

Well I need batman to come out of hiding then lol

 

[ironpony]

Depends on how much value you put on the warranty. If you do the delete, chances are KW will consider the warranty voided.

 

[Mike]

Get the DPF taken care of.

Honestly, after a year, I still wouldn't do a delete.

@mndriver , you have fought through the emissions issues, much of it typically comes down to air leaks, but I think you can provide some insight on things that can be looked at to help prevent future annoying emissions codes and the accompanying fuel economy issues. You got a Volvo, but I think what you have done is likely common with all manufacturers.

 

[pushbroom]

I have a 2014 Kenworth T660 with a brand new in frame done at Kenworth, ($31000) and now I need some advice on a DPF situation. Reason for the the in frame was due to the old style rings in the ISX15, letting oil go through and clog the DPF filter. Kenworth wants $5000 to either replace or clean the DPF tank and replace the filter. I have a year warranty on the in frame. After a year, Ill delete it but just to ease Kenworth's mind about the DPF, I need to get one.

So, what would yall do in this case? Delete it anyways, or find a used one for now?

The burning oil issue is fixed by a different piston/ liner design that has a scraping ring in the liner to remove carbon deposits from the top of the piston and stopping the liner from getting polished by the carbon buildup. Typically the extra oil consumption will cause the dpf to plug prematurely.

You can clean the DPF which is usually 4hrs to remove and install plus the cleaning cost.
A new replacement is usually 3000$ Canadian but a Cummins reman is usually 1500$ Canadian.
No point finding a used one, you will have to clean it anyway and honestly the remans are cheap enough.

I not sure by the phrase "clean the DPF tank and replace the filter"

DPF = diesel particulate filter which traps all the soot and ash in the exhaust and burns it out by doing regens.

DEF = 32.5% Urea/water mixture that is dosed into the SCR to reduce NOX emissions.

Are you saying they want to clean the DEF tank and replace the DPF filter? Not sure why the DEF tank needs to be cleaned.

 

[Electric Chicken]

The burning oil issue is fixed by a different piston/ liner design that has a scraping ring in the liner to remove carbon deposits from the top of the piston and stopping the liner from getting polished by the carbon buildup. Typically the extra oil consumption will cause the dpf to plug prematurely.

You can clean the DPF which is usually 4hrs to remove and install plus the cleaning cost.
A new replacement is usually 3000$ Canadian but a Cummins reman is usually 1500$ Canadian.
No point finding a used one, you will have to clean it anyway and honestly the remans are cheap enough.

I not sure by the phrase "clean the DPF tank and replace the filter"

DPF = diesel particulate filter which traps all the soot and ash in the exhaust and burns it out by doing regens.

DEF = 32.5% Urea/water mixture that is dosed into the SCR to reduce NOX emissions.

Are you saying they want to clean the DEF tank and replace the DPF filter? Not sure why the DEF tank needs to be cleaned.

The DEF tank needs cleaned because it's more billable hours.

Duh.

 

[Hennessey]

They dont know how much oil has gotten to the bottom, where the filter sits. They fear that if i drive it off the lot the oil will heat up and catch fire. This is coming from the Kenworth service department.

 

[Hennessey]

DPF = diesel particulate filter which traps all the soot and ash in the exhaust and burns it out by doing regens.

I'm sorry but you got it . The dpf, is what that wanna clean due to the oil and right now I'm just looking for some cheaper options to get my truck up and running. There was a place in Virginia that does DPF deletes, and I did ask them how much they would charge me to put a "used" one on the truck and the prices were just outstanding. $4700 to delete from them, $5000 to clean from Kenworth.

 

[pushbroom]

They dont know how much oil has gotten to the bottom, where the filter sits. They fear that if i drive it off the lot the oil will heat up and catch fire. This is coming from the Kenworth service department.

How much oil was it burning? It drove in didnt it? How did the rebuild get more oil in the dpf?
Were they so scared they never even started it after the rebuild?


I mean too much oil in the dpf causing a fire is a real thing but its more like when the turbo shaft split in half and it pumps oil directly into the exhaust and 10L are sitting in the dpf.

 

[Hennessey]

I was burning close to 3 gallons every 8 to 9 days. after the rebuild they claimed they took it out on a test drive and everything was ok. I havent drove it yet because they told me the dpf needs to be done.

 

[Mike]

I would get it replaced, as the dealer advised.

 

[pushbroom]

Yes it probably needs replaced but it wont catch on fire or anything.
Very frequent regens is more likely

 

[mndriver]

Get the DPF taken care of.

Honestly, after a year, I still wouldn't do a delete.

@mndriver , you have fought through the emissions issues, much of it typically comes down to air leaks, but I think you can provide some insight on things that can be looked at to help prevent future annoying emissions codes and the accompanying fuel economy issues. You got a Volvo, but I think what you have done is likely common with all manufacturers.

When people start saying delete, I walk away from the conversation.

It means nothing to fix a dpf problem if you haven’t addressed the reason for the oil bath. Even if you delete it.

If the cause has resulted in an an inframe, then it needs to be confirmed the problem is solved.

Not sure why he’s not just replacing the dpf/doc himself. either way it’s still not a cheap fix.

 

[ironpony]

I mean too much oil in the dpf causing a fire is a real thing but its more like when the turbo shaft split in half and it pumps oil directly into the exhaust and 10L are sitting in the dpf.

Its a real concern. I had a truck under warranty blow a turbo, and a significant quantity of oil got back into the DPF. The system cycled the DPF on, and overheated it. Basically it destroyed everything in the can. Warranty covered everything, including the tow. I paid $130 in shop costs to fix it.

 

[mndriver]

The downstream damage of an equipment failure is real.

Makes preventative maintenance that much more valuable.

 

[mndriver]

Its a real concern. I had a truck under warranty blow a turbo, and a significant quantity of oil got back into the DPF. The system cycled the DPF on, and overheated it. Basically it destroyed everything in the can. Warranty covered everything, including the tow. I paid $130 in shop costs to fix it.

Good reasons to buy and pay extra for a warranty that has progressive damage.