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
My summary and hope you folks will add/correct/etc
- It appears that there 'might' be some pressure wave(s) floating around down stream from the injectors, unknown if there is any effect inside the pump
- It appears to have no accumulator in the plenums, which would negate and/or reduce 'enough' any pressure waves
- Timing of the pump PSI cycling has been mentioned...I personally can not see how they could manage to time a 2 piston cyclical waves to an 8 injector cyclical waves
- The pump shaft is driven by a cogged belt and ask if they have a TDC mark or any kind of timing marks on both the drive and driven pulley
- There appears to be no other means indicating 'timing' controls
- The one way valve closure married with the piston reversing direction for the intake stroke is the most likely source of cavitation
- Possible factored by any injector pressure wave...it it is timed to the falling edge
- DLC is selectively plated and most likely only on the cam/follower area
- Possible unplated metal that has possible corrosion to create potential debris that would be loosened by cavitation events
- Organic amines are now known to weaken DLC, once thought to be inert
- How does organic amines attack DLC and the resultant condition of the DLC
- Pump shaft bearing and seal as potential sources of both H2O and debris
- Cam follower alignment, how bullet proof is that alignment...new thought, does a diesel 'back fire' to have the cam follower hiccup?
