EGR Life span
Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
There was in fact a redesign (pink dot) but it does not account for the huge decline in EGR issues. My belief is something changed in both fuel (mostly) and lubricating oil formulation. Sometime around 2008, the problems started to fade. These days, if you clean the EGR valve, there is not much build a year later.... Unless you are in a high soot / crud climate like I am... even then... I can't wait till the end of the summer to pull teh valve and see what it looks like after a year.
Fleet Owner
Joined: Nov 2003
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Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
Mark,
I think so... but does that in and of itself account for the ending of the EGR clogging?
I thought the pink dot version only strengthened the seals and electro-mechanicals?
Can't as readily see how that helped with soot buildup except for properly operating EGR flow means better combustion.
Something very odd.. I think it is fuel chemistry.
I think so... but does that in and of itself account for the ending of the EGR clogging?
I thought the pink dot version only strengthened the seals and electro-mechanicals?
Can't as readily see how that helped with soot buildup except for properly operating EGR flow means better combustion.
Something very odd.. I think it is fuel chemistry.
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Fleet Owner
Joined: Nov 2003
Posts: 27,897
Likes: 3,615
Mark,
I think so... but does that in and of itself account for the ending of the EGR clogging?
I thought the pink dot version only strengthened the seals and electro-mechanicals?
Can't as readily see how that helped with soot buildup except for properly operating EGR flow means better combustion.
Something very odd.. I think it is fuel chemistry.
I think so... but does that in and of itself account for the ending of the EGR clogging?
I thought the pink dot version only strengthened the seals and electro-mechanicals?
Can't as readily see how that helped with soot buildup except for properly operating EGR flow means better combustion.
Something very odd.. I think it is fuel chemistry.
Ford upgraded the spring also. I kinda figured that it kept the EGR flow in tighter control and eliminated leakage.
Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
That cold be... because the coking is from incomplete combustion.
It is still a big problem in northern climes, with the killer of cold and low cetane.
The more EGR, the lower the combustion temp.
IMHO, until the engine warms completely, there is really no call to introduce EGR.
If it was jammed slightly open, not closing properly, etc... that would really coke it fast.
It is still a big problem in northern climes, with the killer of cold and low cetane.
The more EGR, the lower the combustion temp.
IMHO, until the engine warms completely, there is really no call to introduce EGR.
If it was jammed slightly open, not closing properly, etc... that would really coke it fast.
Elder User
Joined: Feb 2011
Posts: 564
Likes: 0
Did you forget why EGR is present? It's not to make your truck run better.
Oh, one more thing. What do you mean by "high soot / crud climate?" Are you suggesting EGR valves clog up sooner in Los Angeles vs. Cody, Wyoming? I bought my truck in Los Angeles, then immediately moved to Cody. I'm afraid breathing clean air could be too much of a shock for it.
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