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Home >> Mazda >> 2021 >> MX-5 Miata Club, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System >> High Pressure Fuel Pump Removal/Installation >> High Pressure Fuel Pipe Installation Note

High Pressure Fuel Pipe Installation Note

CAUTION:
  • Damage or deformation to the end of the high pressure fuel pipe may cause fuel leakage. When installing the high pressure fuel pipe to the high pressure fuel pump, be very careful while handling the end of the high pressure fuel pipe.
  • If parts are exposed to fuel, their function may be decreased or a fire may occur. Always wipe off any leaked fuel using a clean rag.
  • Do not let foreign materials enter into the high pressure fuel pipe.
  • Install a new high pressure fuel pipe because it cannot be reused.
  • To prevent cracking and fuel leakage of the high pressure fuel pipe, do not remove the damper and tape installed to the high pressure fuel pipe. Otherwise, it could cause cracks on the high pressure fuel pipe and fuel leakage.
G13488258Courtesy of MAZDA MOTORS CORP.
  1. Temporarily tighten the nuts on both ends until they are seated to the nipple of the high pressure fuel pipe.
    G11274468Courtesy of MAZDA MOTORS CORP.
  2. Temporarily tighten the high pressure fuel pipe bracket installation bolt.
    CAUTION:
    • Performing the procedure with the tightening nut angled at or away from the SST shaft could cause fuel leakage because the tightening nut cannot be tightened to the specified torque. Perform the procedure with the tightening nut and the SST shaft parallel to each other.
      G11274469Courtesy of MAZDA MOTORS CORP.
    • I pay attention so that a dent and a vice are not put on the plating in the high pressure fuel pipe surface at the time of SST use.
  3. Tighten the nuts on both ends using the SST.
    G11274470Courtesy of MAZDA MOTORS CORP.

    High pressure fuel pipe tightening torque 

    17-23 N.m {1.8-2.3 kgf.m, 13-16 ft.lbf}

  4. Tighten the high pressure fuel pipe bracket installation bolt.

    High pressure fuel pipe bracket installation bolt tightening torque 

    8-11 N.m {82-112 kgf.cm, 71-97 in.lbf}