Jump to content

DEF VS ULSD

Rate this topic


Recommended Posts

DEF wins that battle every time.

 

I gots me a 2012 6.7L that was fed DEF and then driven. Makes a horrible noise when cranking like compression blowing out from under the intake. But, the fuel HPFP appears to be blown apart and seized as fuel is pouring out as fast as it is delivered. To make matters worse we have very low relative compression in 4 cylinders and I am betting the cam gear is not in it's original position.

 

Waiting for an insurance adjuster to appear...

Link to comment
Share on other sites

I'm not buying that. I bought a used 6.7 already, and car-part.com has a bunch of them starting at $6500 complete, A grade (low miles runs good). Putting in a used engine is generally much easier than a long block or running complete, I bet you could have it done in 12 hrs. Even when you add the fuel tank and pump you should be well under 15k. When I bought mine I got EVERYTHING, and I mean everything I wanted- exhaust from front to back, DEF tank, pumps, sensors, aftercooler, etc for not much more than the number above.

 

Why are they talking about totaling it? Is it whipped, beat or high miles already? C/C or P/U?

 

Edit: Do they have to keep the factory warranty intact? Will FMC warranty a used engine? I doubt it.....

 

 

Posted Image

Link to comment
Share on other sites

NO, they aren't totaling it - the adjuster was just yapping. The truck does have high mileage though and that was his basis. Also, the used engine cost came from the same guy... filtered through my service adviser and I agree it makes no sense. At this point it is moot because it was pretty much approved at this point BUT the customer had to agree to some tear down time as the insurance co wants to see the "bad stuff" before cutting a check. In any case, we are all in agreement on the worse case scenario.

 

So I went to car-part.com and you are absolutely right Bruce. Maybe I need to bring this idea up!

Link to comment
Share on other sites

Insurance companys are not the brightest. For example....our pickup that got plowed in the bed forward of the rear wheel by a motorcycle. They quoted replacement of the inner and outer bedsides, respraying the bedliner, fixing the floor and bulkhead, and paint was double or triple what a brand new takeoff bed would have cost. They cut us a check for the repairs and I went out and bought a brand new take off bed for 1100bucks that will be 10times better then any body man can fix the original wrecked bed.

Link to comment
Share on other sites

That's not fraud, he is allowed to spend an insurance check however he likes.....

 

Posted Image

 

I think here in Ontario, if a quote is presented and an insurance company accepts it, and the customer accepts it you have to do the repairs as you put on the quote, if I recall rightly.

 

I seem to remember a big to-do about something like this going on when I worked at a dealership with a bodyshop, but there was also the aspect that the manager was pocketing the difference, so it may have been a combo of both that has me misinformed.

Link to comment
Share on other sites

So to catch up with this one, the final diagnosis is DEF contamination of the fuel resulting in a seized HPFP which caused the gear on the crankshaft to rotate several degrees from its proper position and the engine mechanically lost time. All 16 intake valves contacted the pistons and of course all 16 intake pushrods were nicely mis-shapen. Cylinder #1 rocker carrier was snapped in two as well.

 

And if you are asking how the crankshaft gear was able to spin... the gears are actually shrink fitted onto the crankshafts with no locking key. My FSE happened to be visiting me today and told me that the crankshafts are actually deep frozen and the gears are super heated before being mated. The temperature extremes are amazing however he did not recall the specifics. I just thought that was amusing as I envisioned a "meat locker like" freezer somewhere with crankshafts hanging about like sides of beef.

 

So why is this taking so long? Apparently all the insurance adjusters are still quite busy from hurricane Sandy. Ford, the underwriter from State Farm Insurance and I all agree that this thing should get a long block. This is in the interest of reliability and maintaining the diesel engine warranty status on the vehicle. I should be ordering parts momentarily. I hope. I will be doing a nice write up in this one with some nice pictures. (cause everyone wants to see the carnage!)

Link to comment
Share on other sites

Quote:
DEF contamination of the fuel resulting in a seized HPFP which caused the gear on the crankshaft to rotate several degrees from its proper position and the engine mechanically lost time. All 16 intake valves contacted the pistons and of course all 16 intake pushrods were nicely mis-shapen. Cylinder #1 rocker carrier was snapped in two as well.

Dear Lord in Heaven, that's a huge operator fuck up!
Link to comment
Share on other sites

  • 2 months later...

Keith supplied me this pump about 2 months ago and it's been staring at me sitting on the bench. :blush: I've been messing with personal projects and finally got around to tearing it down and shooting pics. The pictures speak for themselves, as the pump ingested DEF causing massive damage inside. One of the lifter rollers finally dislodged, jammed between the lobe and the aluminum housing causing the housing to split.
 
Posted Image

Posted Image

Posted Image
Posted Image
Posted Image

Here's the plungers, severely discolored.


Posted Image
Even after cleaning, the lifter rollers show their triangular wear and discoloration.
 

Posted Image
This truck ran for several minutes, miles, or hours as the DEF flowed through it. I'm sure the pump was making quite a racket as the rollers decided to quit rolling, sliding across the cam lobes grinding away their last minutes. At this point the engine should have been misfiring severely from ingesting DEF also. It would be nice to have an honest interview with the driver about the last few minutes of the pump's life, but it will never happen.

Thanks, Keith!

:grin:

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...