Ford's answers to the NHTSA 6.7 Investigation
There was a request for a link to Ford's answer's to the NHTSA investigation posted on a previous thread, since closed. Here is the link: Ford's NHTSA Answers to the 6.7 investigation This PDF i...
Forum Discussion
Standyne paper
White paper on fuel, lubricity additives from tribology standpoint and HIBOCLE new testing methods for wear from diesel fuel lubricity in relationship to High pressure fuel pumps used in Common rail diesel vehicles.
Fresh data found in SAE papers... Low and behold, Bosch KNEW about testing techniques used by ASTM in the USA for diesel fuel was not an accurate tribological representation testing format for the motions their HPFP internals went through... they developed a new HIBOCLE testing format which closer matched the engineering stresses and conditions of lubricity that their CP4.x pumps generated.
http://www.infineum.com/Documents/Fuels%20Technical%20Papers/SAE/2009-01-0848.pdf
Also note that they run German 5% RAPESEED based biodiesel in their testing, German Fuel, for lubricity... US uses waste vegetable oil, perhaps soy based, or animal fats, or, or... Bosch knew the fuel was a problem and their pump was unsuitable for use on US based fuel.... also noted that the viscosity of the diesel fuel (higher or thicker being better) is also a problem with hydro treated to remove sulfur diesel fuel.
This common position statement confirms the results of the white paper above submitted to the Society of Automotive Engineers.
http://www.stanadyne.com/docs/pubs/FIEM_Common_Position_Statement_2009.pdf
If you read the full paper, (and you should) you can clearly see what the temperature of the fuel running through the HFPF adversely affects the wear rate of the HPFP surfaces... what this means is that since your fuel is used to cool your HPFP, it is damn important to keep at least a 1/4 of a tank of fuel in your truck at all times, as your fuel is also recirculated as coolant. Running your fuel tank low is bad, bad bad for your HPFP, your are running your pump low on fuel as coolant.
White paper on fuel, lubricity additives from tribology standpoint and HIBOCLE new testing methods for wear from diesel fuel lubricity in relationship to High pressure fuel pumps used in Common rail diesel vehicles.
Fresh data found in SAE papers... Low and behold, Bosch KNEW about testing techniques used by ASTM in the USA for diesel fuel was not an accurate tribological representation testing format for the motions their HPFP internals went through... they developed a new HIBOCLE testing format which closer matched the engineering stresses and conditions of lubricity that their CP4.x pumps generated.
http://www.infineum.com/Documents/Fuels%20Technical%20Papers/SAE/2009-01-0848.pdf
Also note that they run German 5% RAPESEED based biodiesel in their testing, German Fuel, for lubricity... US uses waste vegetable oil, perhaps soy based, or animal fats, or, or... Bosch knew the fuel was a problem and their pump was unsuitable for use on US based fuel.... also noted that the viscosity of the diesel fuel (higher or thicker being better) is also a problem with hydro treated to remove sulfur diesel fuel.
This common position statement confirms the results of the white paper above submitted to the Society of Automotive Engineers.
http://www.stanadyne.com/docs/pubs/FIEM_Common_Position_Statement_2009.pdf
If you read the full paper, (and you should) you can clearly see what the temperature of the fuel running through the HFPF adversely affects the wear rate of the HPFP surfaces... what this means is that since your fuel is used to cool your HPFP, it is damn important to keep at least a 1/4 of a tank of fuel in your truck at all times, as your fuel is also recirculated as coolant. Running your fuel tank low is bad, bad bad for your HPFP, your are running your pump low on fuel as coolant.
