Mechanic changed my Focus 2014`s diesel fuel filter, then because he didn't know the correct method to bleed the system, instead he pressurized the fuel tank with compressor. Car ran fine. But the question is can you damage anything with this practice, like fuel pump?

I didn't find any info about this kind of practice. Thanks in advance.

  • Given the pressure the fuel pump is designed to provide, then no, I doubt any damage will happen. Some mechanics use a method to "suck" the fuel through, others pre-fill the new filter first... What do you consider to be the "correct" method?
    – Solar Mike
    Jan 31 '19 at 18:24
  • @SolarMike Thanks for clarifying Mike. I'm certainly not an expert on this topic, but what I mean by "the correct method" is to use the second/electronic fuel pump by cycling ignition for 5 times, each waiting 6 seconds. But if it works by that way and won't cause any problem than it's fine. But finding nearly nothing about this practice in Google worried me at first.
    – user45417
    Jan 31 '19 at 18:34
  • As long as they don't put too much pressure on the tank it is a time proven method to prime the fuel system on gas and diesel vehicles when they wont self prime for some reason.
    – Moab
    Feb 1 '19 at 23:55

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