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They don't. But, what does happen is when the HPFP goes bad, or an injector does, the metal shavings end up in the return line going back to the tank. The shavings in the tank reveal that something is majorily wrong with either the HPFP or an injector.
pulled my primary and secondary filter today. there was a very small amount of metal shavings in the primary filter. the filter was not original so no way of telling if this truck had a fuel system repair in the prior 84K miles.
the truck has just become a local only truck until I can pull the tank.
How does the tank get contaminated? I phoned the guys that are doing mine and they said there weren't pulling tank?
Can anyone help me out here , somethings not adding up?
T hey quoted me 20 hours for labour and around $6000 for parts?
Sound right?
How does the tank get contaminated? I phoned the guys that are doing mine and they said there weren't pulling tank?
Can anyone help me out here , somethings not adding up?
T hey quoted me 20 hours for labour and around $6000 for parts?
Sound right?
what I am being told is that as either the high pressure fuel pump or injectors start to fail...metal shavings are generated which wind up in the tank supposedly because the fuel rails are circulatory and fuel winds up back into the tank.
your primary filter will trap all the metal shavings but the problem is either the high pressure pump or injectors failing and generating the shavings.
OK so I just got off the phone with a friends whos a fairly good mechanic , hes owned lots of equipment and has some good knowledge about diesels.
Hes says he cant understand how the high pressure fuel pump could be gone in my truck when it starts so easily?
It starts right up only turns over about once. He says it should be hard to start because the pump isn't pressuring things up right?
Next thing he made me question was the shavings in the fuel filter means they must have already went all through my system?
The shop says they aren't cleaning the tank , well the shavings had to go through the tank before they got to the filter?
I'm really starting to wonder if I should take it somewhere for a second opinion before I plunk down 10G?
I would be very cautious letting an independent shop work on your truck. There are lots of very specific procedures that have to be followed, and many of them are unique to the application. Screwing this up means it all may have to be redone.
I wouldn't let anyone other than a dealer with a qualified tech to diagnose and fix this.
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