Broken Fuel Pump Torx Bolt

Discussion in 'Mazdaspeed 3 Troubleshooting' started by SavSpeedMS3, Feb 14, 2017.

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  1. SavSpeedMS3

    SavSpeedMS3 JRico32 Greenie Member

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    So everything has been going pretty well with what I have been working on, granted I haven't done any major projects. Well last night when I was going to reinstall my fuel pump after changing out the internals (went well), I snapped one of the fuel pump bolt heads off. The frustrating part is even having over torqued it, it never felt like I was applying that much more pressure than the torq specs (80-97 in/lbs). Either way, I read that this has been an issue occasionally for others and they recommended changing out the bolts anyway, a few people having done that before breaking one.
    I overnighted factory ones as a backup plan but will see if I can find something to replace that are socket heads caps.
     
  2. Theoretics

    Theoretics Greenie Member

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    I did that. Well I fractured the bolt body in the threaded area when the cheap ass harbor freight torque wrench didn't click. Fortunately it didn't come in half just spiraled down the threads. It doesn't take too much extra torque to break them.

    I replaced the one I broke with the Mazda part. I only did it because the local hardware store didn't have anything similar at the time. Now I make sure the torque wrench breaks at a lower torque before I put the full torque to it.
     
    Theoretics, via a Nexus device, Feb 14, 2017
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  3. djohns

    djohns Greenie Member

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    Fuck tightening to "spec" tighten it down until its snug and stop. I've done this with plenty of fuel pumps and nothing has ever happened.
     
    Last edited: Feb 14, 2017
    djohns, via an iPhone, Feb 14, 2017
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  4. SavSpeedMS3

    SavSpeedMS3 JRico32 Greenie Member

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    I'll consider this a lesson learned. I'll get this fixed and then continue on.
     
  5. Littleloogy

    Littleloogy Recovering Speed Addict Platinum Member

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    Yikes. Lesson to be learned, never mix the words harbor freight and torque wrench.
    You sure you didn't have it set on foot lbs?


    Sent from my iPhone using Tapatalk Pro
     
    Littleloogy, via a mobile device, Feb 14, 2017
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  6. SharksInSpace

    SharksInSpace Planets and shit. Silver Member

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    Eat less spinach
     
    SharksInSpace, via a mobile device, Feb 14, 2017
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  7. SavSpeedMS3

    SavSpeedMS3 JRico32 Greenie Member

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    I did but I looked up the conversion from ft. lbs to in. lbs. Checked it a couple times.

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    SavSpeedMS3, via a mobile device, Feb 14, 2017
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  8. connor_cwp

    connor_cwp Greenie Member

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    I broke all three because I'm an idiot sometimes and read the in. lbs. as ft. lbs. :bash:
     
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  9. SavSpeedMS3

    SavSpeedMS3 JRico32 Greenie Member

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    How were you able to get the broken bolts out?
     
  10. connor_cwp

    connor_cwp Greenie Member

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    Well only one of them broke all the way. The other two just had stretched threads so I was able to take them out.

    Luckily the bolts are a lot weaker than the housing threads, and when the bolt tore in half it was protruding outside the threads, so I was able to take the pump portion off, and then grab the end of it with a pair of needle nose and twist it out.
     
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  11. SavSpeedMS3

    SavSpeedMS3 JRico32 Greenie Member

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    That is what I am hoping for. I read somewhere that a couple guys had taken a dremel and sheered the top off, and were able ot remove the pump then full the screws out. I've got factory replacements on the way (delivery set for today) but am going to Fastenal to find a better replacement.
     
  12. Theoretics

    Theoretics Greenie Member

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    If you sheared the bolt flush you should still be able to drill the body and use an extractor. Worst case scenario anyway. Other options include slotting the bolt body and try a screwdriver or weld another bolt to it.

    I'm the drill screw body and extractor type.
     
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  13. Mastermind46

    Mastermind46 Greenie Member

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    I may or may not have overlooked the in/lb and tightened all 3 to ft/lb... snapping all three off. Luckily enough someone had some extras but I was able to grab the broken bolts and hand screw them out. Isn't the norm to replace them with stand hex bolts now?
     
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  14. SavSpeedMS3

    SavSpeedMS3 JRico32 Greenie Member

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    Based on what I have read yeah it is. A lot of people, myself included, are not fans of the reverse torx bolt.
     
  15. SavSpeedMS3

    SavSpeedMS3 JRico32 Greenie Member

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    Replacement bolts arrived today! I will get this fixed after I get off work at 530 tomorrow morning

    Sent from my XT1650 using Tapatalk
     
    Last edited: Feb 18, 2017
    SavSpeedMS3, via a mobile device, Feb 17, 2017
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  16. SavSpeedMS3

    SavSpeedMS3 JRico32 Greenie Member

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    So quick update - Got 2 bolts out but the last one is stripped and I cannot get a good grip on it with pliers or vice grips. I read a few places that some guys used a Dremel to take the screw head off, then were able to remove the fuel pump and then the bolt.
    Obviously trying to avoid doing any damage and causing any further issues, but is it true that would work?
     
  17. Raider

    Raider Administraider Administrator Platinum Member

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    You just need to get a solid grip and unscrew it. Bump for attention
     
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  18. Theoretics

    Theoretics Greenie Member

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    If you've still got meat left on the head battery pliers work really well.

    [​IMG]

    You should be able to cut off the head (or knock of off) then slide the pump off backward which will leave the body of the screw in there then grab it with pliers and unthread. The CDFP pump housing isn't threaded so it'll just slide out.
     
  19. SavSpeedMS3

    SavSpeedMS3 JRico32 Greenie Member

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    I ended up taking to my local shop where they did an excellent job helping me remove the pump. I couldn't get the last bolt (the one on the bottom) out and I didn't want to risk damage. They took care of it about an hour and put everything that I had taken out back in. Lesson learned - be more cautious when torqueing. Never had that issue before but I sure picked a hell of a time to have it.
     
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