off road fuel
Posting Guru
Joined: Jan 2005
Posts: 1,353
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From: Nothern Indiana
Originally Posted by spikebee
Try this link: http://i130.photobucket.com/albums/p...elted%20engine
Are you saying red fuel caused that ??
Red fuel made the piston melt ??
I'm not saying red fuel is good fuel but how did it cause that.
Senior User
Joined: Nov 2006
Posts: 176
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Red fuel didn't directly melt the piston, a combination of things starting with red fuel did. This engine was so carboned up from using crappy fuel that the EGR stuck wide open and the turbo stuck on high boost. The combination, due to causing a severe lean condition, melts #3 piston and scatters it through the engine. We've had three of them at our dealership and we're not even a really big truck shop. I know there's problems with carbon deposits on all 6.0l's but i've never seen any as bad as when they run that off road fuel.
Former Vendor
Joined: Mar 2004
Posts: 4,362
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From: Hendersonville, NC
Originally Posted by spikebee
Red fuel didn't directly melt the piston, a combination of things starting with red fuel did. This engine was so carboned up from using crappy fuel that the EGR stuck wide open and the turbo stuck on high boost. The combination, due to causing a severe lean condition, melts #3 piston and scatters it through the engine. We've had three of them at our dealership and we're not even a really big truck shop. I know there's problems with carbon deposits on all 6.0l's but i've never seen any as bad as when they run that off road fuel.
I think I'm going to link to this post in a thread I started in the competiton forum however, because the fact that the number 3 cylinder was the one that melted correpsonds with some things I've been working on for a few weeks. You might want to take a look.
Senior User
Joined: Nov 2006
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Originally Posted by PSD 60L Fx4
Even though the stuck VGT will cause an overheat, it is from exhaust backpressure, not a lean condition...You cannot "lean out" a diesel because it is not volumetrically throttled.
I think I'm going to link to this post in a thread I started in the competiton forum however, because the fact that the number 3 cylinder was the one that melted correpsonds with some things I've been working on for a few weeks. You might want to take a look.
I think I'm going to link to this post in a thread I started in the competiton forum however, because the fact that the number 3 cylinder was the one that melted correpsonds with some things I've been working on for a few weeks. You might want to take a look.
Senior User
Joined: Nov 2006
Posts: 176
Likes: 0
Originally Posted by BowTieHatr
what dealer you work at spike?
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Former Vendor
Joined: Mar 2004
Posts: 4,362
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From: Hendersonville, NC
Originally Posted by spikebee
I didn't think it sounded kosher when the tech hotline explained it to me either, but that's how the engineer put it. But I definitely would like to see your theory, because I've got a few of my own about overboost heat and EGR heat and inert gas. I''ll definitely take a peek!
They are probably contracting those guys out of India or China nowdays 
Diesels idle between 80:1 and 100:1 A/F stoich ratio- if "lean burn" was the issue as Hotline said, they would melt down at idle. It's actually appaling considering the source of information, its sad that Ford would provide such low grade information to their own techs 
Between the lack of oxygen due to excessive EGR, and the excessive backpressure from the stuck VGT (which in itself makes the EGR issue even worse) I can only imagine what kind of EGT's were being produced.
Last edited by PSD 60L Fx4; Nov 5, 2006 at 09:15 PM.