I'm glad you listened to us and not your dealer. Did they find out why it cracked? If they have a way to look into the RAM data in the EECU, it could tell them what and why. Also, ask to have the tailpipe cleaned out so you can tell if it cracks again.

 

How much soot is acceptable? I bought my truck in May with 30 miles on it. Now at 7000 the tailpipes are black on the inside. Nothing real thick and I noticed that they turned darker over the last couple of months. I haven't thought much about it until I read this post. Any comments?

 

Sounds like you have a problem but, from past posts it might save you some time to call your dealer and talk with them about it because there have been reports of dealers saying thats normal, while others are actually looking into the problems. Last guy said they replaced his DPF.

 

i have an 2008 f250 diesel and it goes into regen about every 18 hours and stays in the regen mode for about 20 minutes but it smokes (white smoke) like hell under the hood and even comes between the cab and bed any sugestions

 

Any visible signs of soot are unacceptable. You have a cracked filter and it needs to be replaced. Furthermore, the root cause of it cracking needs to be determined or it will happen again. DON'T let a dealer tell it's normal. Like I said in an earlier post in this thread, I have more experience with these systems than any Ford dealer does right now.

 

The white smoke is from the raw fuel being injected into the cylinders on the exhaust stroke. White smoke is normal from the tail pipe for a short period, however, it sounds like you have some exhaust system leaks ahead of the dpf that needs to be addressed.

 

thanks for the info but i cant hear any exhaust leaks and the smoke comes from the passenger side by the fire wall

 

Points for "rob_nc"

Good work.

-Mike

 

It doesn't take a leak large enough to be audible to cause a huge cloud of white smoke at the leak. One evidence of a leak before the dpf are telltale soot trails. Usually, the joint between the turbo and exhaust system is great for leaks due to thermal cycling, especially if it isn't sealed well with a graphite-type seal. You could also have a leak at the exhaust manifold on the right side of the engine. You have 4 gaskets plus a joint between the manifold and turbo(s).