Ford's answers to the NHTSA 6.7 Investigation

NewsW wrote:

coolbreeze01 wrote:

And back to my theory. If the very first fuel these engines are fed has the normal water content expected in diesel fuel, then the engine isn't run for some time, isn't it possible enough rust could form internally to cause a problem?

Yes. That has not been ruled out.

The ASTM standard calls for .05% water and sediments by volume in diesel when it is made.

But, in the filling station storage and customer fuel tank, it is hygroscopic and that number can go up quite a bit.

Because fuel is heated as it is used -- that cause more water to be absorbed from the air if a tank is repeatedly used and filled partly.


What bothers me is rust in the pump is a key piece of evidence used to blame customer for fuel contamination.

The question is, can visible rust form from normal fuel as opposed to contaminated fuel?

IMHO, don't think it has to be visible and rephrase the question to
be: '...how large a particle does it take to plow open the DLC coating?...'

Then to take it further...where else in the upstream (heck, since there
is a return...anywhere) system has bare metal that can oxide ?

NewsW wrote:
They jacked up the maximum pressure from 1,600 to 2,000 bar, an increase of 25%!

This also creates a 'better' cavitation environment in addition to
removing the first stage pump, which would have had a higher pressure
in the chamber(s)


p

NewsW wrote:

I need to consult an expert on this, but I can already guess the answer, "it depends" on what is in the H2O. What does H2O have in solution? Ethanol? Methanol? Iron Oxides? Calcium? etc.

Then the possible combo's thereof that might/would be reactive to
iron oxide or whatever other contaminate is in that brew

Heads up diesel folks...most legislative forces are about if not already
mandating in a MINIMUM % bio-diesel soon...what would that witches brew be ?