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
BenK wrote:
Oh, to those who have had failures or hearing sounds of potential and eminent
failure...
Think too late and it's done for
DO NOT let them take the pump
Either DIY with witnesses, or have certified HPFP shop disassemble it paying
special attention to the cam follower and piston mating surface.
Video tape it and with several witnesses would be the best of all situations
Anyone talking or in come sort of communications with the NHTSA ? Suggest getting
them to inspect the follower/piston mating surfaces for tell-tale hammering
Am positive that the root cause is the metering valve and the resultant
is the piston hammering the follower mating surface
What do you folks think?
I think your supposition matches the look of the beat to death internal parts in my Bosch CP4.2 series pump. The bottoms of the pistons, the follower's and the cam lobes show considerable damage with scoring, fretting and material loss indications. The rotators that isolate the return springs are ferrous material. Both rotators also show rotational scoring and fretting. There is also material loss from the both sides of the contact surfaces.This metal had to go someplace...
Regards
